// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// @dart = 2.8

import 'dart:async';
import 'dart:ui' as ui show BoxHeightStyle, BoxWidthStyle, Color;

import 'package:flutter/cupertino.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart' show DragStartBehavior, PointerDeviceKind;
import 'package:flutter_test/flutter_test.dart';

import '../rendering/mock_canvas.dart';

class MockClipboard {
  Object _clipboardData = <String, dynamic>{
    'text': null,
  };

  Future<dynamic> handleMethodCall(MethodCall methodCall) async {
    switch (methodCall.method) {
      case 'Clipboard.getData':
        return _clipboardData;
      case 'Clipboard.setData':
        _clipboardData = methodCall.arguments;
        break;
    }
  }
}

class PathBoundsMatcher extends Matcher {
  const PathBoundsMatcher({
    this.rectMatcher,
    this.topMatcher,
    this.leftMatcher,
    this.rightMatcher,
    this.bottomMatcher,
  }) : super();

  final Matcher rectMatcher;
  final Matcher topMatcher;
  final Matcher leftMatcher;
  final Matcher rightMatcher;
  final Matcher bottomMatcher;

  @override
  bool matches(covariant Path item, Map<dynamic, dynamic> matchState) {
    final Rect bounds = item.getBounds();

    final List<Matcher> matchers = <Matcher> [rectMatcher, topMatcher, leftMatcher, rightMatcher, bottomMatcher];
    final List<dynamic> values = <dynamic> [bounds, bounds.top, bounds.left, bounds.right, bounds.bottom];
    final Map<Matcher, dynamic> failedMatcher = <Matcher, dynamic> {};

    for(int idx = 0; idx < matchers.length; idx++) {
      if (!(matchers[idx]?.matches(values[idx], matchState) != false)) {
        failedMatcher[matchers[idx]] = values[idx];
      }
    }

    matchState['failedMatcher'] = failedMatcher;
    return failedMatcher.isEmpty;
  }

  @override
  Description describe(Description description) => description.add('The actual Rect does not match');

  @override
  Description describeMismatch(covariant Path item, Description mismatchDescription, Map<dynamic, dynamic> matchState, bool verbose) {
    final Description description = super.describeMismatch(item, mismatchDescription, matchState, verbose);
    final Map<Matcher, dynamic> map = matchState['failedMatcher'] as Map<Matcher, dynamic>;
    final Iterable<String> descriptions = map.entries
      .map<String>(
        (MapEntry<Matcher, dynamic> entry) => entry.key.describeMismatch(entry.value, StringDescription(), matchState, verbose).toString()
      );

    // description is guaranteed to be non-null.
    return description
        ..add('mismatch Rect: ${item.getBounds()}')
        .addAll(': ', ', ', '. ', descriptions);
  }
}

class PathPointsMatcher extends Matcher {
  const PathPointsMatcher({
    this.includes = const <Offset>[],
    this.excludes = const <Offset>[],
  }) : super();

  final Iterable<Offset> includes;
  final Iterable<Offset> excludes;

  @override
  bool matches(covariant Path item, Map<dynamic, dynamic> matchState) {
    final Offset notIncluded = includes.firstWhere((Offset offset) => !item.contains(offset), orElse: () => null);
    final Offset notExcluded = excludes.firstWhere(item.contains, orElse: () => null);

    matchState['notIncluded'] = notIncluded;
    matchState['notExcluded'] = notExcluded;
    return (notIncluded ?? notExcluded) == null;
  }

  @override
  Description describe(Description description) => description.add('must include these points $includes and must not include $excludes');

  @override
  Description describeMismatch(covariant Path item, Description mismatchDescription, Map<dynamic, dynamic> matchState, bool verbose) {
    final Offset notIncluded = matchState['notIncluded'] as Offset;
    final Offset notExcluded = matchState['notExcluded'] as Offset;
    final Description desc = super.describeMismatch(item, mismatchDescription, matchState, verbose);

    if ((notExcluded ?? notIncluded) != null) {
      desc.add('Within the bounds of the path ${item.getBounds()}: ');
    }

    if (notIncluded != null) {
      desc.add('$notIncluded is not included. ');
    }
    if (notExcluded != null) {
      desc.add('$notExcluded is not excluded. ');
    }
    return desc;
  }
}


void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  final MockClipboard mockClipboard = MockClipboard();
  SystemChannels.platform.setMockMethodCallHandler(mockClipboard.handleMethodCall);

  // Returns the first RenderEditable.
  RenderEditable findRenderEditable(WidgetTester tester) {
    final RenderObject root = tester.renderObject(find.byType(EditableText));
    expect(root, isNotNull);

    RenderEditable renderEditable;
    void recursiveFinder(RenderObject child) {
      if (child is RenderEditable) {
        renderEditable = child;
        return;
      }
      child.visitChildren(recursiveFinder);
    }
    root.visitChildren(recursiveFinder);
    expect(renderEditable, isNotNull);
    return renderEditable;
  }

  List<TextSelectionPoint> globalize(Iterable<TextSelectionPoint> points, RenderBox box) {
    return points.map<TextSelectionPoint>((TextSelectionPoint point) {
      return TextSelectionPoint(
        box.localToGlobal(point.point),
        point.direction,
      );
    }).toList();
  }

  Offset textOffsetToBottomLeftPosition(WidgetTester tester, int offset) {
    final RenderEditable renderEditable = findRenderEditable(tester);
    final List<TextSelectionPoint> endpoints = globalize(
      renderEditable.getEndpointsForSelection(
        TextSelection.collapsed(offset: offset),
      ),
      renderEditable,
    );
    expect(endpoints.length, 1);
    return endpoints[0].point;
  }

  Offset textOffsetToPosition(WidgetTester tester, int offset) => textOffsetToBottomLeftPosition(tester, offset) + const Offset(0, -2);

  setUp(() async {
    EditableText.debugDeterministicCursor = false;
    // Fill the clipboard so that the Paste option is available in the text
    // selection menu.
    await Clipboard.setData(const ClipboardData(text: 'Clipboard data'));
  });

  testWidgets(
    'takes available space horizontally and takes intrinsic space vertically no-strut',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: ConstrainedBox(
              constraints: BoxConstraints.loose(const Size(200, 200)),
              child: const CupertinoTextField(strutStyle: StrutStyle.disabled),
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)),
        const Size(200, 29), // 29 is the height of the default font + padding etc.
      );
    },
  );

  testWidgets(
    'takes available space horizontally and takes intrinsic space vertically',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: ConstrainedBox(
              constraints: BoxConstraints.loose(const Size(200, 200)),
              child: const CupertinoTextField(),
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)),
        const Size(200, 29), // 29 is the height of the default font (17) + decoration (12).
      );
    },
  );

  testWidgets(
    'multi-lined text fields are intrinsically taller no-strut',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: ConstrainedBox(
              constraints: BoxConstraints.loose(const Size(200, 200)),
              child: const CupertinoTextField(
                maxLines: 3,
                strutStyle: StrutStyle.disabled,
              ),
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)),
        const Size(200, 63), // 63 is the height of the default font (17) * maxlines (3) + decoration height (12).
      );
    },
  );

  testWidgets(
    'multi-lined text fields are intrinsically taller',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: ConstrainedBox(
              constraints: BoxConstraints.loose(const Size(200, 200)),
              child: const CupertinoTextField(maxLines: 3),
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)),
        const Size(200, 63),
      );
    },
  );

  testWidgets(
    'strut height override',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: ConstrainedBox(
              constraints: BoxConstraints.loose(const Size(200, 200)),
              child: const CupertinoTextField(
                maxLines: 3,
                strutStyle: StrutStyle(
                  fontSize: 8,
                  forceStrutHeight: true,
                ),
              ),
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)),
        const Size(200, 36),
      );
    },
  );

  testWidgets(
    'strut forces field taller',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: ConstrainedBox(
              constraints: BoxConstraints.loose(const Size(200, 200)),
              child: const CupertinoTextField(
                maxLines: 3,
                style: TextStyle(fontSize: 10),
                strutStyle: StrutStyle(
                  fontSize: 18,
                  forceStrutHeight: true,
                ),
              ),
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)),
        const Size(200, 66),
      );
    },
  );

  testWidgets(
    'default text field has a border',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(),
          ),
        ),
      );

      BoxDecoration decoration = tester.widget<DecoratedBox>(
        find.descendant(
          of: find.byType(CupertinoTextField),
          matching: find.byType(DecoratedBox),
        ),
      ).decoration as BoxDecoration;

      expect(
        decoration.borderRadius,
        BorderRadius.circular(5),
      );
      expect(
        decoration.border.bottom.color.value,
        0x33000000,
      );

      // Dark mode.
      await tester.pumpWidget(
        const CupertinoApp(
          theme: CupertinoThemeData(brightness: Brightness.dark),
          home: Center(
            child: CupertinoTextField(),
          ),
        ),
      );

      decoration = tester.widget<DecoratedBox>(
        find.descendant(
          of: find.byType(CupertinoTextField),
          matching: find.byType(DecoratedBox),
        ),
      ).decoration as BoxDecoration;

      expect(
        decoration.borderRadius,
        BorderRadius.circular(5),
      );
      expect(
        decoration.border.bottom.color.value,
        0x33FFFFFF,
      );
    },
  );

  testWidgets(
    'decoration can be overrriden',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              decoration: null,
            ),
          ),
        ),
      );

      expect(
        find.descendant(
          of: find.byType(CupertinoTextField),
          matching: find.byType(DecoratedBox),
        ),
        findsNothing,
      );
    },
  );

  testWidgets(
    'text entries are padded by default',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: TextEditingController(text: 'initial'),
            ),
          ),
        ),
      );

      expect(
        tester.getTopLeft(find.text('initial')) - tester.getTopLeft(find.byType(CupertinoTextField)),
        const Offset(6.0, 6.0),
      );
    },
  );

  testWidgets('iOS cursor has offset', (WidgetTester tester) async {
    await tester.pumpWidget(
      const CupertinoApp(
        home: CupertinoTextField(),
      ),
    );

    final EditableText editableText = tester.firstWidget(find.byType(EditableText));
    expect(editableText.cursorOffset, const Offset(-2.0 / 3.0, 0));
  });

  testWidgets('Cursor animates', (WidgetTester tester) async {
    await tester.pumpWidget(
      const CupertinoApp(
        home: CupertinoTextField(),
      ),
    );

    final Finder textFinder = find.byType(CupertinoTextField);
    await tester.tap(textFinder);
    await tester.pump();

    final EditableTextState editableTextState = tester.firstState(find.byType(EditableText));
    final RenderEditable renderEditable = editableTextState.renderEditable;

    expect(renderEditable.cursorColor.alpha, 255);

    await tester.pump(const Duration(milliseconds: 100));
    await tester.pump(const Duration(milliseconds: 400));

    expect(renderEditable.cursorColor.alpha, 255);

    await tester.pump(const Duration(milliseconds: 200));
    await tester.pump(const Duration(milliseconds: 100));

    expect(renderEditable.cursorColor.alpha, 110);

    await tester.pump(const Duration(milliseconds: 100));

    expect(renderEditable.cursorColor.alpha, 16);
    await tester.pump(const Duration(milliseconds: 50));

    expect(renderEditable.cursorColor.alpha, 0);
  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS, TargetPlatform.macOS }));

  testWidgets('Cursor radius is 2.0', (WidgetTester tester) async {
    await tester.pumpWidget(
      const CupertinoApp(
        home: CupertinoTextField(),
      ),
    );

    final EditableTextState editableTextState = tester.firstState(find.byType(EditableText));
    final RenderEditable renderEditable = editableTextState.renderEditable;

    expect(renderEditable.cursorRadius, const Radius.circular(2.0));
  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS, TargetPlatform.macOS }));

  testWidgets('Cupertino cursor android golden', (WidgetTester tester) async {
    final Widget widget = CupertinoApp(
      home: Center(
        child: RepaintBoundary(
          key: const ValueKey<int>(1),
          child: ConstrainedBox(
            constraints: BoxConstraints.loose(const Size(400, 400)),
            child: const CupertinoTextField(),
          ),
        ),
      ),
    );
    await tester.pumpWidget(widget);

    const String testValue = 'A short phrase';
    await tester.enterText(find.byType(CupertinoTextField), testValue);
    await tester.pump();

    await tester.tapAt(textOffsetToPosition(tester, testValue.length));
    await tester.pumpAndSettle();

    await expectLater(
      find.byKey(const ValueKey<int>(1)),
      matchesGoldenFile('text_field_cursor_test.cupertino.0.png'),
    );
  });

  testWidgets('Cupertino cursor golden', (WidgetTester tester) async {
    final Widget widget = CupertinoApp(
      home: Center(
        child: RepaintBoundary(
          key: const ValueKey<int>(1),
          child: ConstrainedBox(
            constraints: BoxConstraints.loose(const Size(400, 400)),
            child: const CupertinoTextField(),
          ),
        ),
      ),
    );
    await tester.pumpWidget(widget);

    const String testValue = 'A short phrase';
    await tester.enterText(find.byType(CupertinoTextField), testValue);
    await tester.pump();

    await tester.tapAt(textOffsetToPosition(tester, testValue.length));
    await tester.pumpAndSettle();

    await expectLater(
      find.byKey(const ValueKey<int>(1)),
      matchesGoldenFile(
        'text_field_cursor_test.cupertino_${describeEnum(debugDefaultTargetPlatformOverride).toLowerCase()}.1.png',
      ),
    );
  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS,  TargetPlatform.macOS }));

  testWidgets(
    'can control text content via controller',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController();

      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      controller.text = 'controller text';
      await tester.pump();

      expect(find.text('controller text'), findsOneWidget);

      controller.text = '';
      await tester.pump();

      expect(find.text('controller text'), findsNothing);
    },
  );

  testWidgets(
    'placeholder respects textAlign',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              placeholder: 'placeholder',
              textAlign: TextAlign.right,
            ),
          ),
        ),
      );

      final Text placeholder = tester.widget(find.text('placeholder'));
      expect(placeholder.textAlign, TextAlign.right);

      await tester.enterText(find.byType(CupertinoTextField), 'input');
      await tester.pump();

      final EditableText inputText = tester.widget(find.text('input'));
      expect(placeholder.textAlign, inputText.textAlign);
    },
  );

  testWidgets('placeholder dark mode', (WidgetTester tester) async {
    await tester.pumpWidget(
      const CupertinoApp(
        theme: CupertinoThemeData(brightness: Brightness.dark),
        home: Center(
          child: CupertinoTextField(
            placeholder: 'placeholder',
            textAlign: TextAlign.right,
          ),
        ),
      ),
    );

    final Text placeholder = tester.widget(find.text('placeholder'));
    expect(placeholder.style.color.value, CupertinoColors.placeholderText.darkColor.value);
  });

  testWidgets(
    'placeholders are lightly colored and disappears once typing starts',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              placeholder: 'placeholder',
            ),
          ),
        ),
      );

      final Text placeholder = tester.widget(find.text('placeholder'));
      expect(placeholder.style.color.value, CupertinoColors.placeholderText.color.value);

      await tester.enterText(find.byType(CupertinoTextField), 'input');
      await tester.pump();
      expect(find.text('placeholder'), findsNothing);
    },
  );

  testWidgets(
    "placeholderStyle modifies placeholder's style and doesn't affect text's style",
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              placeholder: 'placeholder',
              style: TextStyle(
                color: Color(0x00FFFFFF),
                fontWeight: FontWeight.w300,
              ),
              placeholderStyle: TextStyle(
                color: Color(0xAAFFFFFF),
                fontWeight: FontWeight.w600,
              ),
            ),
          ),
        ),
      );

      final Text placeholder = tester.widget(find.text('placeholder'));
      expect(placeholder.style.color, const Color(0xAAFFFFFF));
      expect(placeholder.style.fontWeight, FontWeight.w600);

      await tester.enterText(find.byType(CupertinoTextField), 'input');
      await tester.pump();

      final EditableText inputText = tester.widget(find.text('input'));
      expect(inputText.style.color, const Color(0x00FFFFFF));
      expect(inputText.style.fontWeight, FontWeight.w300);
    },
  );

  testWidgets(
    'prefix widget is in front of the text',
    (WidgetTester tester) async {
      final FocusNode focusNode = FocusNode();
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              focusNode: focusNode,
              prefix: const Icon(CupertinoIcons.add),
              controller: TextEditingController(text: 'input'),
            ),
          ),
        ),
      );

      expect(
        tester.getTopRight(find.byIcon(CupertinoIcons.add)).dx + 6.0, // 6px standard padding around input.
        tester.getTopLeft(find.byType(EditableText)).dx,
      );

      expect(
        tester.getTopLeft(find.byType(EditableText)).dx,
        tester.getTopLeft(find.byType(CupertinoTextField)).dx
            + tester.getSize(find.byIcon(CupertinoIcons.add)).width
            + 6.0,
      );
    },
  );

  testWidgets(
    'prefix widget respects visibility mode',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              prefix: Icon(CupertinoIcons.add),
              prefixMode: OverlayVisibilityMode.editing,
            ),
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.add), findsNothing);
      // The position should just be the edge of the whole text field plus padding.
      expect(
        tester.getTopLeft(find.byType(EditableText)).dx,
        tester.getTopLeft(find.byType(CupertinoTextField)).dx + 6.0,
      );

      await tester.enterText(find.byType(CupertinoTextField), 'text input');
      await tester.pump();

      expect(find.text('text input'), findsOneWidget);
      expect(find.byIcon(CupertinoIcons.add), findsOneWidget);

      // Text is now moved to the right.
      expect(
        tester.getTopLeft(find.byType(EditableText)).dx,
        tester.getTopLeft(find.byType(CupertinoTextField)).dx
            + tester.getSize(find.byIcon(CupertinoIcons.add)).width
            + 6.0,
      );
    },
  );

  testWidgets(
    'suffix widget is after the text',
    (WidgetTester tester) async {
      final FocusNode focusNode = FocusNode();
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              focusNode: focusNode,
              suffix: const Icon(CupertinoIcons.add),
            ),
          ),
        ),
      );

      expect(
        tester.getTopRight(find.byType(EditableText)).dx + 6.0,
        tester.getTopLeft(find.byIcon(CupertinoIcons.add)).dx, // 6px standard padding around input.
      );

      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        tester.getTopRight(find.byType(CupertinoTextField)).dx
            - tester.getSize(find.byIcon(CupertinoIcons.add)).width
            - 6.0,
      );
    },
  );

  testWidgets(
    'suffix widget respects visibility mode',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              suffix: Icon(CupertinoIcons.add),
              suffixMode: OverlayVisibilityMode.notEditing,
            ),
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.add), findsOneWidget);

      await tester.enterText(find.byType(CupertinoTextField), 'text input');
      await tester.pump();

      expect(find.text('text input'), findsOneWidget);
      expect(find.byIcon(CupertinoIcons.add), findsNothing);
    },
  );

  testWidgets(
    'can customize padding',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              padding: EdgeInsets.zero,
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(EditableText)),
        tester.getSize(find.byType(CupertinoTextField)),
      );
    },
  );

  testWidgets(
    'padding is in between prefix and suffix no-strut',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              padding: EdgeInsets.all(20.0),
              prefix: SizedBox(height: 100.0, width: 100.0),
              suffix: SizedBox(height: 50.0, width: 50.0),
              strutStyle: StrutStyle.disabled,
            ),
          ),
        ),
      );

      expect(
        tester.getTopLeft(find.byType(EditableText)).dx,
        // Size of prefix + padding.
        100.0 + 20.0,
      );

      expect(tester.getTopLeft(find.byType(EditableText)).dy, 291.5);

      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 50.0 - 20.0,
      );

      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              padding: EdgeInsets.all(30.0),
              prefix: SizedBox(height: 100.0, width: 100.0),
              suffix: SizedBox(height: 50.0, width: 50.0),
              strutStyle: StrutStyle.disabled,
            ),
          ),
        ),
      );

      expect(
        tester.getTopLeft(find.byType(EditableText)).dx,
        100.0 + 30.0,
      );

      // Since the highest component, the prefix box, is higher than
      // the text + paddings, the text's vertical position isn't affected.
      expect(tester.getTopLeft(find.byType(EditableText)).dy, 291.5);

      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 50.0 - 30.0,
      );
    },
  );

  testWidgets(
    'padding is in between prefix and suffix',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              padding: EdgeInsets.all(20.0),
              prefix: SizedBox(height: 100.0, width: 100.0),
              suffix: SizedBox(height: 50.0, width: 50.0),
            ),
          ),
        ),
      );

      expect(
        tester.getTopLeft(find.byType(EditableText)).dx,
        // Size of prefix + padding.
        100.0 + 20.0,
      );

      expect(tester.getTopLeft(find.byType(EditableText)).dy, 291.5);

      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 50.0 - 20.0,
      );

      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              padding: EdgeInsets.all(30.0),
              prefix: SizedBox(height: 100.0, width: 100.0),
              suffix: SizedBox(height: 50.0, width: 50.0),
            ),
          ),
        ),
      );

      expect(
        tester.getTopLeft(find.byType(EditableText)).dx,
        100.0 + 30.0,
      );

      // Since the highest component, the prefix box, is higher than
      // the text + paddings, the text's vertical position isn't affected.
      expect(tester.getTopLeft(find.byType(EditableText)).dy, 291.5);

      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 50.0 - 30.0,
      );
    },
  );

  testWidgets(
    'clear button shows with right visibility mode',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController();
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              placeholder: 'placeholder does not affect clear button',
              clearButtonMode: OverlayVisibilityMode.always,
            ),
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsOneWidget);

      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 30.0  /* size of button */ - 6.0 /* padding */,
      );

      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              placeholder: 'placeholder does not affect clear button',
              clearButtonMode: OverlayVisibilityMode.editing,
            ),
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsNothing);
      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 6.0 /* padding */,
      );

      await tester.enterText(find.byType(CupertinoTextField), 'text input');
      await tester.pump();

      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsOneWidget);
      expect(find.text('text input'), findsOneWidget);
      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 30.0 - 6.0,
      );

      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              placeholder: 'placeholder does not affect clear button',
              clearButtonMode: OverlayVisibilityMode.notEditing,
            ),
          ),
        ),
      );
      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsNothing);

      controller.text = '';
      await tester.pump();

      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsOneWidget);
    },
  );

  testWidgets(
    'clear button removes text',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController();
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              placeholder: 'placeholder',
              clearButtonMode: OverlayVisibilityMode.editing,
            ),
          ),
        ),
      );

      controller.text = 'text entry';
      await tester.pump();

      await tester.tap(find.byIcon(CupertinoIcons.clear_thick_circled));
      await tester.pump();

      expect(controller.text, '');
      expect(find.text('placeholder'), findsOneWidget);
      expect(find.text('text entry'), findsNothing);
      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsNothing);
    },
  );

  testWidgets(
    'tapping clear button also calls onChanged when text not empty',
    (WidgetTester tester) async {
      String value = 'text entry';
      final TextEditingController controller = TextEditingController();
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              placeholder: 'placeholder',
              onChanged: (String newValue) => value = newValue,
              clearButtonMode: OverlayVisibilityMode.always,
            ),
          ),
        ),
      );

      controller.text = value;
      await tester.pump();

      await tester.tap(find.byIcon(CupertinoIcons.clear_thick_circled));
      await tester.pump();

      expect(controller.text, isEmpty);
      expect(find.text('text entry'), findsNothing);
      expect(value, isEmpty);
    },
  );

  testWidgets(
    'clear button yields precedence to suffix',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController();
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              clearButtonMode: OverlayVisibilityMode.always,
              suffix: const Icon(CupertinoIcons.add_circled_solid),
              suffixMode: OverlayVisibilityMode.editing,
            ),
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsOneWidget);
      expect(find.byIcon(CupertinoIcons.add_circled_solid), findsNothing);

      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 30.0  /* size of button */ - 6.0 /* padding */,
      );

      controller.text = 'non empty text';
      await tester.pump();

      expect(find.byIcon(CupertinoIcons.clear_thick_circled), findsNothing);
      expect(find.byIcon(CupertinoIcons.add_circled_solid), findsOneWidget);

      // Still just takes the space of one widget.
      expect(
        tester.getTopRight(find.byType(EditableText)).dx,
        800.0 - 24.0  /* size of button */ - 6.0 /* padding */,
      );
    },
  );

  testWidgets(
    'font style controls intrinsic height no-strut',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              strutStyle: StrutStyle.disabled,
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        29.0,
      );

      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              style: TextStyle(
                // A larger font.
                fontSize: 50.0,
              ),
              strutStyle: StrutStyle.disabled,
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        62.0,
      );
    },
  );

  testWidgets(
    'font style controls intrinsic height',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        29.0,
      );

      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              style: TextStyle(
                // A larger font.
                fontSize: 50.0,
              ),
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        62.0,
      );
    },
  );

  testWidgets(
    'RTL puts attachments to the right places',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Directionality(
            textDirection: TextDirection.rtl,
            child: Center(
              child: CupertinoTextField(
                padding: EdgeInsets.all(20.0),
                prefix: Icon(CupertinoIcons.book),
                clearButtonMode: OverlayVisibilityMode.always,
              ),
            ),
          ),
        ),
      );

      expect(
        tester.getTopLeft(find.byIcon(CupertinoIcons.book)).dx,
        800.0 - 24.0,
      );

      expect(
        tester.getTopRight(find.byIcon(CupertinoIcons.clear_thick_circled)).dx,
        24.0,
      );
    },
  );

  testWidgets(
    'text fields with no max lines can grow no-strut',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              maxLines: null,
              strutStyle: StrutStyle.disabled,
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        29.0, // Initially one line high.
      );

      await tester.enterText(find.byType(CupertinoTextField), '\n');
      await tester.pump();

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        46.0, // Initially one line high.
      );
    },
  );

  testWidgets(
    'text fields with no max lines can grow',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              maxLines: null,
            ),
          ),
        ),
      );

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        29.0, // Initially one line high.
      );

      await tester.enterText(find.byType(CupertinoTextField), '\n');
      await tester.pump();

      expect(
        tester.getSize(find.byType(CupertinoTextField)).height,
        46.0, // Initially one line high.
      );
    },
  );

  testWidgets('cannot enter new lines onto single line TextField', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController();

    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            controller: controller,
          ),
        ),
      ),
    );

    await tester.enterText(find.byType(CupertinoTextField), 'abc\ndef');

    expect(controller.text, 'abcdef');
  });

  testWidgets('toolbar has the same visual regardless of theming', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: "j'aime la poutine",
    );

    await tester.pumpWidget(
      CupertinoApp(
        home: Column(
          children: <Widget>[
            CupertinoTextField(
              controller: controller,
            ),
          ],
        ),
      ),
    );

    await tester.longPressAt(
      tester.getTopRight(find.text("j'aime la poutine"))
    );
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 200));

    Text text = tester.widget<Text>(find.text('Paste'));
    expect(text.style.color, CupertinoColors.white);
    expect(text.style.fontSize, 14);
    expect(text.style.letterSpacing, -0.15);
    expect(text.style.fontWeight, FontWeight.w400);

    // Change the theme.
    await tester.pumpWidget(
      CupertinoApp(
        theme: const CupertinoThemeData(
          brightness: Brightness.dark,
          textTheme: CupertinoTextThemeData(
            textStyle: TextStyle(fontSize: 100, fontWeight: FontWeight.w800),
          ),
        ),
        home: Column(
          children: <Widget>[
            CupertinoTextField(
              controller: controller,
            ),
          ],
        ),
      ),
    );

    await tester.longPressAt(
      tester.getTopRight(find.text("j'aime la poutine"))
    );
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 200));

    text = tester.widget<Text>(find.text('Paste'));
    // The toolbar buttons' text are still the same style.
    expect(text.style.color, CupertinoColors.white);
    expect(text.style.fontSize, 14);
    expect(text.style.letterSpacing, -0.15);
    expect(text.style.fontWeight, FontWeight.w400);
  });


  testWidgets('text field toolbar options correctly changes options', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'Atwater Peel Sherbrooke Bonaventure',
    );
    await tester.pumpWidget(
      CupertinoApp(
        home: Column(
          children: <Widget>[
            CupertinoTextField(
              controller: controller,
              toolbarOptions: const ToolbarOptions(copy: true),
            ),
          ],
        ),
      ),
    );

      // Long press to put the cursor after the "w".
      const int index = 3;
      await tester.longPressAt(textOffsetToPosition(tester, index));
      await tester.pump();
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: index),
      );

      // Double tap on the same location to select the word around the cursor.
      await tester.tapAt(textOffsetToPosition(tester, index));
      await tester.pump(const Duration(milliseconds: 50));
      await tester.tapAt(textOffsetToPosition(tester, index));
      await tester.pump();
      expect(
        controller.selection,
        const TextSelection(baseOffset: 0, extentOffset: 7),
      );

      // Selected text shows 'Copy'.
      expect(find.text('Paste'), findsNothing);
      expect(find.text('Copy'), findsOneWidget);
      expect(find.text('Cut'), findsNothing);
      expect(find.text('Select All'), findsNothing);
  });
  testWidgets('Read only text field', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(text: 'readonly');

    await tester.pumpWidget(
      CupertinoApp(
        home: Column(
          children: <Widget>[
            CupertinoTextField(
              controller: controller,
              readOnly: true,
            ),
          ],
        ),
      ),
    );
    // Read only text field cannot open keyboard.
    await tester.showKeyboard(find.byType(CupertinoTextField));
    expect(tester.testTextInput.hasAnyClients, false);

    await tester.longPressAt(
        tester.getTopRight(find.text('readonly'))
    );

    await tester.pump();

    expect(find.text('Paste'), findsNothing);
    expect(find.text('Cut'), findsNothing);
    expect(find.text('Select All'), findsOneWidget);

    await tester.tap(find.text('Select All'));
    await tester.pump();

    expect(find.text('Copy'), findsOneWidget);
    expect(find.text('Paste'), findsNothing);
    expect(find.text('Cut'), findsNothing);
  });

  testWidgets('copy paste', (WidgetTester tester) async {
    await tester.pumpWidget(
      CupertinoApp(
        home: Column(
          children: const <Widget>[
            CupertinoTextField(
              placeholder: 'field 1',
            ),
            CupertinoTextField(
              placeholder: 'field 2',
            ),
          ],
        ),
      ),
    );

    await tester.enterText(
      find.widgetWithText(CupertinoTextField, 'field 1'),
      "j'aime la poutine",
    );
    await tester.pump();

    // Tap an area inside the EditableText but with no text.
    await tester.longPressAt(
      tester.getTopRight(find.text("j'aime la poutine"))
    );
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 200));

    await tester.tap(find.text('Select All'));
    await tester.pump();

    await tester.tap(find.text('Cut'));
    await tester.pump();

    // Placeholder 1 is back since the text is cut.
    expect(find.text('field 1'), findsOneWidget);
    expect(find.text('field 2'), findsOneWidget);

    await tester.longPress(find.text('field 2'));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 200));

    await tester.tap(find.text('Paste'));
    await tester.pump();

    expect(find.text('field 1'), findsOneWidget);
    expect(find.text("j'aime la poutine"), findsOneWidget);
    expect(find.text('field 2'), findsNothing);
  });

  testWidgets(
    'tap moves cursor to the edge of the word it tapped on',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump();

      // We moved the cursor.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 7, affinity: TextAffinity.upstream),
      );

      // But don't trigger the toolbar.
      expect(find.byType(CupertinoButton), findsNothing);
    },
  );

  testWidgets(
    'slow double tap does not trigger double tap',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump(const Duration(milliseconds: 500));
      await tester.tapAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump();

      // Plain collapsed selection.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 7, affinity: TextAffinity.upstream),
      );

      // No toolbar.
      expect(find.byType(CupertinoButton), findsNothing);
    },
  );

  testWidgets(
    'double tap selects word and first tap of double tap moves cursor',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      // Long press to put the cursor after the "w".
      const int index = 3;
      await tester.longPressAt(textOffsetToPosition(tester, index));
      await tester.pump();
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: index),
      );

      // Double tap on the same location to select the word around the cursor.
      await tester.tapAt(textOffsetToPosition(tester, index));
      await tester.pump(const Duration(milliseconds: 50));
      await tester.tapAt(textOffsetToPosition(tester, index));
      await tester.pumpAndSettle();
      expect(
        controller.selection,
        const TextSelection(baseOffset: 0, extentOffset: 7),
      );

      // Selected text shows 3 toolbar buttons.
      expect(find.byType(CupertinoButton), findsNWidgets(3));
    },
  );

  testWidgets(
    'double tap selects word and first tap of double tap moves cursor',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump(const Duration(milliseconds: 500));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      // First tap moved the cursor.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 8, affinity: TextAffinity.downstream),
      );
      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pumpAndSettle();

      // Second tap selects the word around the cursor.
      expect(
        controller.selection,
        const TextSelection(baseOffset: 8, extentOffset: 12),
      );

      // Selected text shows 3 toolbar buttons.
      expect(find.byType(CupertinoButton), findsNWidgets(3));
    },
  );

  testWidgets(
    'double tap hold selects word',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      final TestGesture gesture =
         await tester.startGesture(textfieldStart + const Offset(150.0, 5.0));
      // Hold the press.
      await tester.pumpAndSettle();

      expect(
        controller.selection,
        const TextSelection(baseOffset: 8, extentOffset: 12),
      );

      // Selected text shows 3 toolbar buttons.
      expect(find.byType(CupertinoButton), findsNWidgets(3));

      await gesture.up();
      await tester.pump();

      // Still selected.
      expect(
        controller.selection,
        const TextSelection(baseOffset: 8, extentOffset: 12),
      );
      expect(find.byType(CupertinoButton), findsNWidgets(3));
    },
  );

  testWidgets(
    'tap after a double tap select is not affected',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      // First tap moved the cursor.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 8, affinity: TextAffinity.downstream),
      );
      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 500));

      await tester.tapAt(textfieldStart + const Offset(100.0, 5.0));
      await tester.pump();

      // Plain collapsed selection at the edge of first word. In iOS 12, the
      // first tap after a double tap ends up putting the cursor at where
      // you tapped instead of the edge like every other single tap. This is
      // likely a bug in iOS 12 and not present in other versions.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 7, affinity: TextAffinity.upstream),
      );

      // No toolbar.
      expect(find.byType(CupertinoButton), findsNothing);
    },
  );

  testWidgets(
    'An obscured CupertinoTextField is not selectable when disabled',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              obscureText: true,
              enableInteractiveSelection: false,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      final TestGesture gesture =
         await tester.startGesture(textfieldStart + const Offset(150.0, 5.0));
      // Hold the press.
      await tester.pump(const Duration(milliseconds: 500));

      // Nothing is selected despite the double tap long press gesture.
      expect(
        controller.selection,
        const TextSelection(baseOffset: 35, extentOffset: 35),
      );

      // The selection menu is not present.
      expect(find.byType(CupertinoButton), findsNWidgets(0));

      await gesture.up();
      await tester.pump();

      // Still nothing selected and no selection menu.
      expect(
        controller.selection,
        const TextSelection(baseOffset: 35, extentOffset: 35),
      );
      expect(find.byType(CupertinoButton), findsNWidgets(0));
    },
  );

  testWidgets(
    'An obscured CupertinoTextField is selectable by default',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
              obscureText: true,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      final TestGesture gesture =
         await tester.startGesture(textfieldStart + const Offset(150.0, 5.0));
      // Hold the press.
      await tester.pumpAndSettle();

      // The obscured text is treated as one word, should select all
      expect(
        controller.selection,
        const TextSelection(baseOffset: 0, extentOffset: 35),
      );

      // Selected text shows paste toolbar buttons.
      expect(find.byType(CupertinoButton), findsNWidgets(1));

      await gesture.up();
      await tester.pump();

      // Still selected.
      expect(
        controller.selection,
        const TextSelection(baseOffset: 0, extentOffset: 35),
      );
      expect(find.byType(CupertinoButton), findsNWidgets(1));
    },
  );

  testWidgets('An obscured TextField has correct default context menu', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'Atwater Peel Sherbrooke Bonaventure',
    );

    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            controller: controller,
            obscureText: true,
          ),
        ),
      ),
    );

    final Offset textfieldStart = tester.getCenter(find.byType(CupertinoTextField));

    await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
    await tester.pump(const Duration(milliseconds: 50));
    await tester.longPressAt(textfieldStart + const Offset(150.0, 5.0));
    await tester.pump();

    // Should only have paste option when whole obscure text is selected.
    expect(find.text('Paste'), findsOneWidget);
    expect(find.text('Copy'), findsNothing);
    expect(find.text('Cut'), findsNothing);
    expect(find.text('Select All'), findsNothing);

    // Tap to cancel selection.
    final Offset textfieldEnd = tester.getTopRight(find.byType(CupertinoTextField));
    await tester.tapAt(textfieldEnd + const Offset(-10.0, 5.0));
    await tester.pump(const Duration(milliseconds: 50));
    // Long tap at the end.
    await tester.longPressAt(textfieldEnd + const Offset(-10.0, 5.0));
    await tester.pump();

    // Should have paste and select all options when collapse.
    expect(find.text('Paste'), findsOneWidget);
    expect(find.text('Select All'), findsOneWidget);
    expect(find.text('Copy'), findsNothing);
    expect(find.text('Cut'), findsNothing);
  });

  testWidgets(
    'long press moves cursor to the exact long press position and shows toolbar',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.longPressAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pumpAndSettle();

      // Collapsed cursor for iOS long press.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 3, affinity: TextAffinity.upstream),
      );

      // Collapsed toolbar shows 2 buttons.
      expect(find.byType(CupertinoButton), findsNWidgets(2));
    },
  );

  testWidgets(
    'long press tap cannot initiate a double tap',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.longPressAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));

      await tester.tapAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump();

      // We ended up moving the cursor to the edge of the same word and dismissed
      // the toolbar.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 7, affinity: TextAffinity.upstream),
      );

      // The toolbar from the long press is now dismissed by the second tap.
      expect(find.byType(CupertinoButton), findsNothing);
    },
  );

  testWidgets(
    'long press drag moves the cursor under the drag and shows toolbar on lift',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      final TestGesture gesture =
          await tester.startGesture(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump(const Duration(milliseconds: 500));

      // Long press on iOS shows collapsed selection cursor.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 3, affinity: TextAffinity.upstream),
      );
      // Toolbar only shows up on long press up.
      expect(find.byType(CupertinoButton), findsNothing);

      await gesture.moveBy(const Offset(50, 0));
      await tester.pump();

      // The selection position is now moved with the drag.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 6, affinity: TextAffinity.upstream),
      );
      expect(find.byType(CupertinoButton), findsNothing);

      await gesture.moveBy(const Offset(50, 0));
      await tester.pump();

      // The selection position is now moved with the drag.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 9, affinity: TextAffinity.upstream),
      );
      expect(find.byType(CupertinoButton), findsNothing);

      await gesture.up();
      await tester.pumpAndSettle();

      // The selection isn't affected by the gesture lift.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 9, affinity: TextAffinity.upstream),
      );
      // The toolbar now shows up.
      expect(find.byType(CupertinoButton), findsNWidgets(2));
    },
  );

  testWidgets('long press drag can edge scroll', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'Atwater Peel Sherbrooke Bonaventure Angrignon Peel Côte-des-Neiges',
    );
    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            controller: controller,
            maxLines: 1,
          ),
        ),
      ),
    );

    final RenderEditable renderEditable = tester.renderObject<RenderEditable>(
      find.byElementPredicate((Element element) => element.renderObject is RenderEditable)
    );

    List<TextSelectionPoint> lastCharEndpoint = renderEditable.getEndpointsForSelection(
      const TextSelection.collapsed(offset: 66), // Last character's position.
    );

    expect(lastCharEndpoint.length, 1);
    // Just testing the test and making sure that the last character is off
    // the right side of the screen.
    expect(lastCharEndpoint[0].point.dx, moreOrLessEquals(1094.73486328125));

    final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

    final TestGesture gesture =
        await tester.startGesture(textfieldStart + const Offset(300, 5));
    await tester.pump(const Duration(milliseconds: 500));

    expect(
      controller.selection,
      const TextSelection.collapsed(offset: 18, affinity: TextAffinity.upstream),
    );
    expect(find.byType(CupertinoButton), findsNothing);

    await gesture.moveBy(const Offset(600, 0));
    // To the edge of the screen basically.
    await tester.pump();
    expect(
      controller.selection,
      const TextSelection.collapsed(offset: 54, affinity: TextAffinity.upstream),
    );
    // Keep moving out.
    await gesture.moveBy(const Offset(1, 0));
    await tester.pump();
    expect(
      controller.selection,
      const TextSelection.collapsed(offset: 61, affinity: TextAffinity.upstream),
    );
    await gesture.moveBy(const Offset(1, 0));
    await tester.pump();
    expect(
      controller.selection,
      const TextSelection.collapsed(offset: 66, affinity: TextAffinity.upstream),
    ); // We're at the edge now.
    expect(find.byType(CupertinoButton), findsNothing);

    await gesture.up();
    await tester.pumpAndSettle();

    // The selection isn't affected by the gesture lift.
    expect(
      controller.selection,
      const TextSelection.collapsed(offset: 66, affinity: TextAffinity.upstream),
    );
    // The toolbar now shows up.
    expect(find.byType(CupertinoButton), findsNWidgets(2));

    lastCharEndpoint = renderEditable.getEndpointsForSelection(
      const TextSelection.collapsed(offset: 66), // Last character's position.
    );

    expect(lastCharEndpoint.length, 1);
    // The last character is now on screen.
    expect(lastCharEndpoint[0].point.dx, moreOrLessEquals(786.73486328125));

    final List<TextSelectionPoint> firstCharEndpoint = renderEditable.getEndpointsForSelection(
      const TextSelection.collapsed(offset: 0), // First character's position.
    );
    expect(firstCharEndpoint.length, 1);
    // The first character is now offscreen to the left.
    expect(firstCharEndpoint[0].point.dx, moreOrLessEquals(-308.20499999821186));
  });

  testWidgets(
    'long tap after a double tap select is not affected',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      // First tap moved the cursor to the beginning of the second word.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 8, affinity: TextAffinity.downstream),
      );
      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 500));

      await tester.longPressAt(textfieldStart + const Offset(100.0, 5.0));
      await tester.pumpAndSettle();

      // Plain collapsed selection at the exact tap position.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 6, affinity: TextAffinity.upstream),
      );

      // Long press toolbar.
      expect(find.byType(CupertinoButton), findsNWidgets(2));
    },
  );

  testWidgets(
    'double tap after a long tap is not affected',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.longPressAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      // First tap moved the cursor.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 8, affinity: TextAffinity.downstream),
      );
      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pumpAndSettle();

      // Double tap selection.
      expect(
        controller.selection,
        const TextSelection(baseOffset: 8, extentOffset: 12),
      );
      // Shows toolbar.
      expect(find.byType(CupertinoButton), findsNWidgets(3));
    },
  );

  testWidgets(
    'double tap chains work',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'Atwater Peel Sherbrooke Bonaventure',
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

      await tester.tapAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 7, affinity: TextAffinity.upstream),
      );
      await tester.tapAt(textfieldStart + const Offset(50.0, 5.0));
      await tester.pumpAndSettle();
      expect(
        controller.selection,
        const TextSelection(baseOffset: 0, extentOffset: 7),
      );
      expect(find.byType(CupertinoButton), findsNWidgets(3));

      // Double tap selecting the same word somewhere else is fine.
      await tester.tapAt(textfieldStart + const Offset(100.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      // First tap moved the cursor.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 7, affinity: TextAffinity.upstream),
      );
      await tester.tapAt(textfieldStart + const Offset(100.0, 5.0));
      await tester.pumpAndSettle();
      expect(
        controller.selection,
        const TextSelection(baseOffset: 0, extentOffset: 7),
      );
      expect(find.byType(CupertinoButton), findsNWidgets(3));

      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pump(const Duration(milliseconds: 50));
      // First tap moved the cursor.
      expect(
        controller.selection,
        const TextSelection.collapsed(offset: 8, affinity: TextAffinity.downstream),
      );
      await tester.tapAt(textfieldStart + const Offset(150.0, 5.0));
      await tester.pumpAndSettle();
      expect(
        controller.selection,
        const TextSelection(baseOffset: 8, extentOffset: 12),
      );
      expect(find.byType(CupertinoButton), findsNWidgets(3));
    },
  );

  testWidgets('force press selects word', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'Atwater Peel Sherbrooke Bonaventure',
    );
    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            controller: controller,
          ),
        ),
      ),
    );

    final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

    const int pointerValue = 1;
    final TestGesture gesture = await tester.createGesture();
    await gesture.downWithCustomEvent(
      textfieldStart + const Offset(150.0, 5.0),
      PointerDownEvent(
        pointer: pointerValue,
        position: textfieldStart + const Offset(150.0, 5.0),
        pressure: 3.0,
        pressureMax: 6.0,
        pressureMin: 0.0,
      ),
    );
    // We expect the force press to select a word at the given location.
    expect(
      controller.selection,
      const TextSelection(baseOffset: 8, extentOffset: 12),
    );

    await gesture.up();
    await tester.pumpAndSettle();
    // Shows toolbar.
    expect(find.byType(CupertinoButton), findsNWidgets(3));
  });

  testWidgets('force press on unsupported devices falls back to tap', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'Atwater Peel Sherbrooke Bonaventure',
    );
    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            controller: controller,
          ),
        ),
      ),
    );

    final Offset textfieldStart = tester.getTopLeft(find.byType(CupertinoTextField));

    const int pointerValue = 1;
    final TestGesture gesture = await tester.createGesture();
    await gesture.downWithCustomEvent(
      textfieldStart + const Offset(150.0, 5.0),
      PointerDownEvent(
        pointer: pointerValue,
        position: textfieldStart + const Offset(150.0, 5.0),
        // iPhone 6 and below report 0 across the board.
        pressure: 0,
        pressureMax: 0,
        pressureMin: 0,
      ),
    );
    await gesture.up();
    // Fall back to a single tap which selects the edge of the word.
    expect(
      controller.selection,
      const TextSelection.collapsed(offset: 8),
    );

    await tester.pump();
    // Falling back to a single tap doesn't trigger a toolbar.
    expect(find.byType(CupertinoButton), findsNothing);
  });

  testWidgets('Cannot drag one handle past the other', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'abc def ghi',
    );

    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            dragStartBehavior: DragStartBehavior.down,
            controller: controller,
            style: const TextStyle(
              fontFamily: 'Ahem',
              fontSize: 10.0,
            ),
          ),
        ),
      ),
    );

    // Double tap on 'e' to select 'def'.
    final Offset ePos = textOffsetToPosition(tester, 5);
    await tester.tapAt(ePos, pointer: 7);
    await tester.pump(const Duration(milliseconds: 50));
    expect(controller.selection.isCollapsed, isTrue);
    expect(controller.selection.baseOffset, 4);
    await tester.tapAt(ePos, pointer: 7);
    await tester.pumpAndSettle();
    expect(controller.selection.baseOffset, 4);
    expect(controller.selection.extentOffset, 7);

    final RenderEditable renderEditable = findRenderEditable(tester);
    final List<TextSelectionPoint> endpoints = globalize(
      renderEditable.getEndpointsForSelection(controller.selection),
      renderEditable,
    );
    expect(endpoints.length, 2);

    // Drag the right handle until there's only 1 char selected.
    // We use a small offset because the endpoint is on the very corner
    // of the handle.
    final Offset handlePos = endpoints[1].point;
    Offset newHandlePos = textOffsetToPosition(tester, 5); // Position of 'e'.
    final TestGesture gesture = await tester.startGesture(handlePos, pointer: 7);
    await tester.pump();
    await gesture.moveTo(newHandlePos);
    await tester.pump();
    expect(controller.selection.baseOffset, 4);
    expect(controller.selection.extentOffset, 5);

    newHandlePos = textOffsetToPosition(tester, 2); // Position of 'c'.
    await gesture.moveTo(newHandlePos);
    await tester.pump();
    await gesture.up();
    await tester.pump();

    expect(controller.selection.baseOffset, 4);
    // The selection doesn't move beyond the left handle. There's always at
    // least 1 char selected.
    expect(controller.selection.extentOffset, 5);
  });

  testWidgets('Can select text by dragging with a mouse', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController();

    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            dragStartBehavior: DragStartBehavior.down,
            controller: controller,
            style: const TextStyle(
              fontFamily: 'Ahem',
              fontSize: 10.0,
            ),
          ),
        ),
      ),
    );

    const String testValue = 'abc def ghi';
    await tester.enterText(find.byType(CupertinoTextField), testValue);
    // Skip past scrolling animation.
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 200));

    final Offset ePos = textOffsetToPosition(tester, testValue.indexOf('e'));
    final Offset gPos = textOffsetToPosition(tester, testValue.indexOf('g'));

    final TestGesture gesture = await tester.startGesture(ePos, kind: PointerDeviceKind.mouse);
    addTearDown(gesture.removePointer);
    await tester.pump();
    await gesture.moveTo(gPos);
    await tester.pump();
    await gesture.up();
    await tester.pumpAndSettle();

    expect(controller.selection.baseOffset, testValue.indexOf('e'));
    expect(controller.selection.extentOffset, testValue.indexOf('g'));
  });

  testWidgets('Continuous dragging does not cause flickering', (WidgetTester tester) async {
    int selectionChangedCount = 0;
    const String testValue = 'abc def ghi';
    final TextEditingController controller = TextEditingController(text: testValue);

    controller.addListener(() {
      selectionChangedCount++;
    });

    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            dragStartBehavior: DragStartBehavior.down,
            controller: controller,
            style: const TextStyle(
              fontFamily: 'Ahem',
              fontSize: 10.0,
            ),
          ),
        ),
      ),
    );

    final Offset cPos = textOffsetToPosition(tester, 2); // Index of 'c'.
    final Offset gPos = textOffsetToPosition(tester, 8); // Index of 'g'.
    final Offset hPos = textOffsetToPosition(tester, 9); // Index of 'h'.

    // Drag from 'c' to 'g'.
    final TestGesture gesture = await tester.startGesture(cPos, kind: PointerDeviceKind.mouse);
    addTearDown(gesture.removePointer);
    await tester.pump();
    await gesture.moveTo(gPos);
    await tester.pumpAndSettle();

    expect(selectionChangedCount, isNonZero);
    selectionChangedCount = 0;
    expect(controller.selection.baseOffset, 2);
    expect(controller.selection.extentOffset, 8);

    // Tiny movement shouldn't cause text selection to change.
    await gesture.moveTo(gPos + const Offset(4.0, 0.0));
    await tester.pumpAndSettle();
    expect(selectionChangedCount, 0);

    // Now a text selection change will occur after a significant movement.
    await gesture.moveTo(hPos);
    await tester.pump();
    await gesture.up();
    await tester.pumpAndSettle();

    expect(selectionChangedCount, 1);
    expect(controller.selection.baseOffset, 2);
    expect(controller.selection.extentOffset, 9);
  });

  testWidgets('Tap does not show handles nor toolbar', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'abc def ghi',
    );

    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(controller: controller),
        ),
      ),
    );

    // Tap to trigger the text field.
    await tester.tap(find.byType(CupertinoTextField));
    await tester.pump();

    final EditableTextState editableText = tester.state(find.byType(EditableText));
    expect(editableText.selectionOverlay.handlesAreVisible, isFalse);
    expect(editableText.selectionOverlay.toolbarIsVisible, isFalse);
  });

  testWidgets('Long press shows toolbar but not handles', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'abc def ghi',
    );

    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(controller: controller),
        ),
      ),
    );

    // Long press to trigger the text field.
    await tester.longPress(find.byType(CupertinoTextField));
    await tester.pump();
    // A long press in Cupertino should position the cursor without any selection.
    expect(controller.selection.isCollapsed, isTrue);

    final EditableTextState editableText = tester.state(find.byType(EditableText));
    expect(editableText.selectionOverlay.handlesAreVisible, isFalse);
    expect(editableText.selectionOverlay.toolbarIsVisible, isTrue);
  });

  testWidgets(
    'Double tap shows handles and toolbar if selection is not collapsed',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'abc def ghi',
      );

      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(controller: controller),
          ),
        ),
      );

      final Offset hPos = textOffsetToPosition(tester, 9); // Position of 'h'.

      // Double tap on 'h' to select 'ghi'.
      await tester.tapAt(hPos);
      await tester.pump(const Duration(milliseconds: 50));
      await tester.tapAt(hPos);
      await tester.pump();

      final EditableTextState editableText = tester.state(find.byType(EditableText));
      expect(editableText.selectionOverlay.handlesAreVisible, isTrue);
      expect(editableText.selectionOverlay.toolbarIsVisible, isTrue);
    },
  );

  testWidgets(
    'Double tap shows toolbar but not handles if selection is collapsed',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'abc def ghi',
      );

      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(controller: controller),
          ),
        ),
      );

      final Offset textEndPos = textOffsetToPosition(tester, 11); // Position at the end of text.

      // Double tap to place the cursor at the end.
      await tester.tapAt(textEndPos);
      await tester.pump(const Duration(milliseconds: 50));
      await tester.tapAt(textEndPos);
      await tester.pump();

      final EditableTextState editableText = tester.state(find.byType(EditableText));
      expect(editableText.selectionOverlay.handlesAreVisible, isFalse);
      expect(editableText.selectionOverlay.toolbarIsVisible, isTrue);
    },
  );

  testWidgets(
    'Mouse long press does not show handles nor toolbar',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'abc def ghi',
      );

      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(controller: controller),
          ),
        ),
      );

      // Long press to trigger the text field.
      final Offset textFieldPos = tester.getCenter(find.byType(CupertinoTextField));
      final TestGesture gesture = await tester.startGesture(
        textFieldPos,
        kind: PointerDeviceKind.mouse,
      );
      addTearDown(gesture.removePointer);
      await tester.pump(const Duration(seconds: 2));
      await gesture.up();
      await tester.pump();

      final EditableTextState editableText = tester.state(find.byType(EditableText));
      expect(editableText.selectionOverlay.toolbarIsVisible, isFalse);
      expect(editableText.selectionOverlay.handlesAreVisible, isFalse);
    },
  );

  testWidgets(
    'Mouse double tap does not show handles nor toolbar',
    (WidgetTester tester) async {
      final TextEditingController controller = TextEditingController(
        text: 'abc def ghi',
      );

      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(controller: controller),
          ),
        ),
      );

      final EditableTextState editableText = tester.state(find.byType(EditableText));

      // Double tap at the end of text.
      final Offset textEndPos = textOffsetToPosition(tester, 11); // Position at the end of text.
      final TestGesture gesture = await tester.startGesture(
        textEndPos,
        kind: PointerDeviceKind.mouse,
      );
      addTearDown(gesture.removePointer);
      await tester.pump(const Duration(milliseconds: 50));
      await gesture.up();
      await tester.pump();
      await gesture.down(textEndPos);
      await tester.pump();
      await gesture.up();
      await tester.pump();

      expect(editableText.selectionOverlay.toolbarIsVisible, isFalse);
      expect(editableText.selectionOverlay.handlesAreVisible, isFalse);

      final Offset hPos = textOffsetToPosition(tester, 9); // Position of 'h'.

      // Double tap on 'h' to select 'ghi'.
      await gesture.down(hPos);
      await tester.pump(const Duration(milliseconds: 50));
      await gesture.up();
      await tester.pump();
      await gesture.down(hPos);
      await tester.pump();
      await gesture.up();
      await tester.pump();

      expect(editableText.selectionOverlay.handlesAreVisible, isFalse);
      expect(editableText.selectionOverlay.toolbarIsVisible, isFalse);
    },
  );

  testWidgets('onTap is called upon tap', (WidgetTester tester) async {
    int tapCount = 0;
    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: CupertinoTextField(
            onTap: () => tapCount++,
          ),
        ),
      ),
    );

    expect(tapCount, 0);
    await tester.tap(find.byType(CupertinoTextField));
    await tester.pump();
    expect(tapCount, 1);

    // Wait out the double tap interval so the next tap doesn't end up being
    // recognized as a double tap.
    await tester.pump(const Duration(seconds: 1));

    // Double tap count as one single tap.
    await tester.tap(find.byType(CupertinoTextField));
    await tester.pump(const Duration(milliseconds: 100));
    await tester.tap(find.byType(CupertinoTextField));
    await tester.pump();
    expect(tapCount, 2);
  });

  testWidgets('onTap does not work when the text field is disabled',
    (WidgetTester tester) async {
      int tapCount = 0;
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              enabled: false,
              onTap: () => tapCount++,
            ),
          ),
        ),
      );

      expect(tapCount, 0);
      await tester.tap(find.byType(CupertinoTextField));
      await tester.pump();
      expect(tapCount, 0);

      // Wait out the double tap interval so the next tap doesn't end up being
      // recognized as a double tap.
      await tester.pump(const Duration(seconds: 1));

      // Enabling the text field, now it should accept taps.
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              onTap: () => tapCount++,
            ),
          ),
        ),
      );

      await tester.tap(find.byType(CupertinoTextField));
      expect(tapCount, 1);

      await tester.pump(const Duration(seconds: 1));

      // Disable it again.
      await tester.pumpWidget(
        CupertinoApp(
          home: Center(
            child: CupertinoTextField(
              enabled: false,
              onTap: () => tapCount++,
            ),
          ),
        ),
      );
      await tester.tap(find.byType(CupertinoTextField));
      await tester.pump();
      expect(tapCount, 1);
  });

  testWidgets(
    'text field respects theme',
    (WidgetTester tester) async {
      await tester.pumpWidget(
        const CupertinoApp(
          theme: CupertinoThemeData(
            brightness: Brightness.dark,
          ),
          home: Center(
            child: CupertinoTextField(),
          ),
        ),
      );

      final BoxDecoration decoration = tester.widget<DecoratedBox>(
        find.descendant(
          of: find.byType(CupertinoTextField),
          matching: find.byType(DecoratedBox),
        ),
      ).decoration as BoxDecoration;

      expect(
        decoration.border.bottom.color.value,
        0x33FFFFFF,
      );

      await tester.enterText(find.byType(CupertinoTextField), 'smoked meat');
      await tester.pump();

      expect(
        tester.renderObject<RenderEditable>(
          find.byElementPredicate((Element element) => element.renderObject is RenderEditable)
        ).text.style.color,
        isSameColorAs(CupertinoColors.white),
      );
    },
  );

  testWidgets(
    'Check the toolbar appears below the TextField when there is not enough space above the TextField to show it',
    (WidgetTester tester) async {
      // This is a regression test for
      // https://github.com/flutter/flutter/issues/29808
      const String testValue = 'abc def ghi';
      final TextEditingController controller = TextEditingController();

      await tester.pumpWidget(
        CupertinoApp(
          home: Container(
            padding: const EdgeInsets.all(30),
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      await tester.enterText(find.byType(CupertinoTextField), testValue);
      // Tap the selection handle to bring up the "paste / select all" menu.
      await tester.tapAt(textOffsetToPosition(tester, testValue.indexOf('e')));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 200)); // skip past the frame where the opacity is zero
      RenderEditable renderEditable = findRenderEditable(tester);
      List<TextSelectionPoint> endpoints = globalize(
        renderEditable.getEndpointsForSelection(controller.selection),
        renderEditable,
      );
      await tester.tapAt(endpoints[0].point + const Offset(1.0, 1.0));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 200)); // skip past the frame where the opacity is zero

      // Verify the selection toolbar position
      Offset toolbarTopLeft = tester.getTopLeft(find.text('Paste'));
      Offset textFieldTopLeft = tester.getTopLeft(find.byType(CupertinoTextField));
      expect(textFieldTopLeft.dy, lessThan(toolbarTopLeft.dy));

      await tester.pumpWidget(
        CupertinoApp(
          home: Container(
            padding: const EdgeInsets.all(150),
            child: CupertinoTextField(
              controller: controller,
            ),
          ),
        ),
      );

      await tester.enterText(find.byType(CupertinoTextField), testValue);
      // Tap the selection handle to bring up the "paste / select all" menu.
      await tester.tapAt(textOffsetToPosition(tester, testValue.indexOf('e')));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 200)); // skip past the frame where the opacity is zero
      renderEditable = findRenderEditable(tester);
      endpoints = globalize(
        renderEditable.getEndpointsForSelection(controller.selection),
        renderEditable,
      );
      await tester.tapAt(endpoints[0].point + const Offset(1.0, 1.0));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 200)); // skip past the frame where the opacity is zero

      // Verify the selection toolbar position
      toolbarTopLeft = tester.getTopLeft(find.text('Paste'));
      textFieldTopLeft = tester.getTopLeft(find.byType(CupertinoTextField));
      expect(toolbarTopLeft.dy, lessThan(textFieldTopLeft.dy));
    },
  );

  testWidgets('text field respects keyboardAppearance from theme', (WidgetTester tester) async {
    final List<MethodCall> log = <MethodCall>[];
    SystemChannels.textInput.setMockMethodCallHandler((MethodCall methodCall) async {
      log.add(methodCall);
    });

    await tester.pumpWidget(
      const CupertinoApp(
        theme: CupertinoThemeData(
          brightness: Brightness.dark,
        ),
        home: Center(
          child: CupertinoTextField(),
        ),
      ),
    );

    await tester.showKeyboard(find.byType(EditableText));
    final MethodCall setClient = log.first;
    expect(setClient.method, 'TextInput.setClient');
    expect(setClient.arguments.last['keyboardAppearance'], 'Brightness.dark');
  });

  testWidgets('text field can override keyboardAppearance from theme', (WidgetTester tester) async {
    final List<MethodCall> log = <MethodCall>[];
    SystemChannels.textInput.setMockMethodCallHandler((MethodCall methodCall) async {
      log.add(methodCall);
    });

    await tester.pumpWidget(
      const CupertinoApp(
        theme: CupertinoThemeData(
          brightness: Brightness.dark,
        ),
        home: Center(
          child: CupertinoTextField(
            keyboardAppearance: Brightness.light,
          ),
        ),
      ),
    );

    await tester.showKeyboard(find.byType(EditableText));
    final MethodCall setClient = log.first;
    expect(setClient.method, 'TextInput.setClient');
    expect(setClient.arguments.last['keyboardAppearance'], 'Brightness.light');
  });

  testWidgets('cursorColor respects theme', (WidgetTester tester) async {
    await tester.pumpWidget(
      const CupertinoApp(
        home: CupertinoTextField(),
      ),
    );

    final Finder textFinder = find.byType(CupertinoTextField);
    await tester.tap(textFinder);
    await tester.pump();

    final EditableTextState editableTextState =
    tester.firstState(find.byType(EditableText));
    final RenderEditable renderEditable = editableTextState.renderEditable;

    expect(renderEditable.cursorColor, CupertinoColors.activeBlue.color);

    await tester.pumpWidget(
      const CupertinoApp(
        home: CupertinoTextField(),
        theme: CupertinoThemeData(
          brightness: Brightness.dark,
        ),
      ),
    );

    await tester.pump();
    expect(renderEditable.cursorColor, CupertinoColors.activeBlue.darkColor);

    await tester.pumpWidget(
      const CupertinoApp(
        home: CupertinoTextField(),
        theme: CupertinoThemeData(
          primaryColor: Color(0xFFF44336),
        ),
      ),
    );

    await tester.pump();
    expect(renderEditable.cursorColor, const Color(0xFFF44336));
  });

  testWidgets('cursor can override color from theme', (WidgetTester tester) async {
    const CupertinoDynamicColor cursorColor = CupertinoDynamicColor.withBrightness(
      color: Color(0x12345678),
      darkColor: Color(0x87654321),
    );

    await tester.pumpWidget(
      const CupertinoApp(
        theme: CupertinoThemeData(),
        home: Center(
          child: CupertinoTextField(
            cursorColor: cursorColor,
          ),
        ),
      ),
    );

    EditableText editableText = tester.firstWidget(find.byType(EditableText));
    expect(editableText.cursorColor.value, 0x12345678);

    await tester.pumpWidget(
      const CupertinoApp(
        theme: CupertinoThemeData(brightness: Brightness.dark),
        home: Center(
          child: CupertinoTextField(
            cursorColor: cursorColor,
          ),
        ),
      ),
    );

    editableText = tester.firstWidget(find.byType(EditableText));
    expect(editableText.cursorColor.value, 0x87654321);
  });

  testWidgets('shows selection handles', (WidgetTester tester) async {
    const String testText = 'lorem ipsum';
    final TextEditingController controller = TextEditingController(text: testText);

    await tester.pumpWidget(
      CupertinoApp(
        theme: const CupertinoThemeData(),
        home: Center(
          child: CupertinoTextField(
            controller: controller,
          ),
        ),
      ),
    );

    final RenderEditable renderEditable =
      tester.state<EditableTextState>(find.byType(EditableText)).renderEditable;

    await tester.tapAt(textOffsetToPosition(tester, 5));
    renderEditable.selectWord(cause: SelectionChangedCause.longPress);
    await tester.pumpAndSettle();

    final List<Widget> transitions =
      find.byType(FadeTransition).evaluate().map((Element e) => e.widget).toList();
    expect(transitions.length, 2);
    final FadeTransition left = transitions[0] as FadeTransition;
    final FadeTransition right = transitions[1] as FadeTransition;

    expect(left.opacity.value, equals(1.0));
    expect(right.opacity.value, equals(1.0));
  }, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS,  TargetPlatform.macOS }));

  testWidgets('when CupertinoTextField would be blocked by keyboard, it is shown with enough space for the selection handle', (WidgetTester tester) async {
    final ScrollController scrollController = ScrollController();
    final TextEditingController controller = TextEditingController();

    await tester.pumpWidget(CupertinoApp(
      theme: const CupertinoThemeData(),
      home: Center(
        child: ListView(
          controller: scrollController,
          children: <Widget>[
            Container(height: 585), // Push field almost off screen.
            CupertinoTextField(controller: controller),
            Container(height: 1000),
          ],
        ),
      ),
    ));

    // Tap the TextField to put the cursor into it and bring it into view.
    expect(scrollController.offset, 0.0);
    await tester.tap(find.byType(CupertinoTextField));
    await tester.pumpAndSettle();

    // The ListView has scrolled to keep the TextField and cursor handle
    // visible.
    expect(scrollController.offset, 26.0);
  });

  testWidgets('disabled state golden', (WidgetTester tester) async {
    await tester.pumpWidget(
      CupertinoApp(
        home: DecoratedBox(
          decoration: const BoxDecoration(color: Color(0xFFFFFFFF)),
          child: Center(
            child: SizedBox(
              width: 200,
              height: 200,
              child: RepaintBoundary(
                key: const ValueKey<int>(1),
                child: CupertinoTextField(
                  controller: TextEditingController(text: 'lorem'),
                  enabled: false,
                ),
              ),
            ),
          ),
        ),
      ),
    );

    await expectLater(
      find.byKey(const ValueKey<int>(1)),
      matchesGoldenFile('text_field_test.disabled.png'),
    );
  });

  group('Text selection toolbar', () {
    testWidgets('Collapsed selection works', (WidgetTester tester) async {
      EditableText.debugDeterministicCursor = true;
      tester.binding.window.physicalSizeTestValue = const Size(400, 400);
      tester.binding.window.devicePixelRatioTestValue = 1;
      TextEditingController controller;
      EditableTextState state;
      Offset bottomLeftSelectionPosition;

      controller = TextEditingController(text: 'a');
      // Top left collapsed selection. The toolbar should flip vertically, and
      // the arrow should not point exactly to the caret because the caret is
      // too close to the left.
      await tester.pumpWidget(
        CupertinoApp(
          debugShowCheckedModeBanner: false,
          home: CupertinoPageScaffold(
            child: Align(
              alignment: Alignment.topLeft,
              child: SizedBox(
                width: 200,
                height: 200,
                child: CupertinoTextField(
                  controller: controller,
                  maxLines: null,
                ),
              ),
            ),
          ),
        ),
      );

      state = tester.state<EditableTextState>(find.byType(EditableText));
      final double lineHeight = state.renderEditable.preferredLineHeight;

      state.renderEditable.selectPositionAt(from: textOffsetToPosition(tester, 0), cause: SelectionChangedCause.tap);
      expect(state.showToolbar(), true);
      await tester.pumpAndSettle();

      bottomLeftSelectionPosition = textOffsetToBottomLeftPosition(tester, 0);
      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathPointsMatcher(
            excludes: <Offset> [
              // Arrow should not point to the selection handle.
              bottomLeftSelectionPosition.translate(0, 8 + 0.1),
            ],
            includes: <Offset> [
              // Expected center of the arrow.
              Offset(26.0, bottomLeftSelectionPosition.dy + 8 + 0.1),
            ],
          ),
        ),
      );

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathBoundsMatcher(
            topMatcher: moreOrLessEquals(bottomLeftSelectionPosition.dy + 8, epsilon: 0.01),
            leftMatcher: moreOrLessEquals(8),
            rightMatcher: lessThanOrEqualTo(400 - 8),
            bottomMatcher: moreOrLessEquals(bottomLeftSelectionPosition.dy + 8 + 43, epsilon: 0.01),
          ),
        ),
      );

      // Top Right collapsed selection. The toolbar should flip vertically, and
      // the arrow should not point exactly to the caret because the caret is
      // too close to the right.
      controller = TextEditingController(text: List<String>.filled(200, 'a').join());
      await tester.pumpWidget(
        CupertinoApp(
          debugShowCheckedModeBanner: false,
          home: CupertinoPageScaffold(
            child: Align(
              alignment: Alignment.topRight,
              child: SizedBox(
                width: 200,
                height: 200,
                child: CupertinoTextField(
                  controller: controller,
                  maxLines: null,
                ),
              ),
            ),
          ),
        ),
      );

      state = tester.state<EditableTextState>(find.byType(EditableText));
      state.renderEditable.selectPositionAt(
        from: tester.getTopRight(find.byType(CupertinoApp)),
        cause: SelectionChangedCause.tap,
      );
      expect(state.showToolbar(), true);
      await tester.pumpAndSettle();

      // -1 because we want to reach the end of the line, not the start of a new line.
      bottomLeftSelectionPosition = textOffsetToBottomLeftPosition(tester, state.renderEditable.selection.baseOffset - 1);

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathPointsMatcher(
            excludes: <Offset> [
              // Arrow should not point to the selection handle.
              bottomLeftSelectionPosition.translate(0, 8 + 0.1),
            ],
            includes: <Offset> [
              // Expected center of the arrow.
              Offset(400 - 26.0, bottomLeftSelectionPosition.dy + 8 + 0.1),
            ],
          ),
        ),
      );

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathBoundsMatcher(
            topMatcher: moreOrLessEquals(bottomLeftSelectionPosition.dy + 8, epsilon: 0.01),
            rightMatcher: moreOrLessEquals(400.0 - 8),
            bottomMatcher: moreOrLessEquals(bottomLeftSelectionPosition.dy + 8 + 43, epsilon: 0.01),
            leftMatcher: greaterThanOrEqualTo(8),
          ),
        ),
      );

      // Normal centered collapsed selection. The toolbar arrow should point down, and
      // it should point exactly to the caret.
      controller = TextEditingController(text: List<String>.filled(200, 'a').join());
      await tester.pumpWidget(
        CupertinoApp(
          debugShowCheckedModeBanner: false,
          home: CupertinoPageScaffold(
            child: Align(
              alignment: Alignment.center,
              child: SizedBox(
                width: 200,
                height: 200,
                child: CupertinoTextField(
                  controller: controller,
                  maxLines: null,
                ),
              ),
            ),
          ),
        ),
      );

      state = tester.state<EditableTextState>(find.byType(EditableText));
      state.renderEditable.selectPositionAt(
        from: tester.getCenter(find.byType(EditableText)),
        cause: SelectionChangedCause.tap,
      );
      expect(state.showToolbar(), true);
      await tester.pumpAndSettle();

      bottomLeftSelectionPosition = textOffsetToBottomLeftPosition(tester, state.renderEditable.selection.baseOffset);

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathPointsMatcher(
            includes: <Offset> [
              // Expected center of the arrow.
              bottomLeftSelectionPosition.translate(0, -lineHeight - 8 - 0.1),
            ],
          ),
        ),
      );

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathBoundsMatcher(
            bottomMatcher: moreOrLessEquals(bottomLeftSelectionPosition.dy - 8 - lineHeight, epsilon: 0.01),
            topMatcher: moreOrLessEquals(bottomLeftSelectionPosition.dy - 8 - lineHeight - 43, epsilon: 0.01),
            rightMatcher: lessThanOrEqualTo(400 - 8),
            leftMatcher: greaterThanOrEqualTo(8),
          ),
        ),
      );

      tester.binding.window.physicalSizeTestValue = null;
      tester.binding.window.devicePixelRatioTestValue = null;
    });

    testWidgets('selecting multiple words works', (WidgetTester tester) async {
      EditableText.debugDeterministicCursor = true;
      tester.binding.window.physicalSizeTestValue = const Size(400, 400);
      tester.binding.window.devicePixelRatioTestValue = 1;
      TextEditingController controller;
      EditableTextState state;

      // Normal multiword collapsed selection. The toolbar arrow should point down, and
      // it should point exactly to the caret.
      controller = TextEditingController(text: List<String>.filled(20, 'a').join('  '));
      await tester.pumpWidget(
        CupertinoApp(
          debugShowCheckedModeBanner: false,
          home: CupertinoPageScaffold(
            child: Align(
              alignment: Alignment.center,
              child: SizedBox(
                width: 200,
                height: 200,
                child: CupertinoTextField(
                  controller: controller,
                  maxLines: null,
                ),
              ),
            ),
          ),
        ),
      );

      state = tester.state<EditableTextState>(find.byType(EditableText));
      final double lineHeight = state.renderEditable.preferredLineHeight;

      // Select the first 2 words.
      state.renderEditable.selectPositionAt(
        from: textOffsetToPosition(tester, 0),
        to: textOffsetToPosition(tester, 4),
        cause: SelectionChangedCause.tap,
      );
      expect(state.showToolbar(), true);
      await tester.pumpAndSettle();

      final Offset selectionPosition = (textOffsetToBottomLeftPosition(tester, 0) + textOffsetToBottomLeftPosition(tester, 4)) / 2;

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathPointsMatcher(
            includes: <Offset> [
              // Expected center of the arrow.
              selectionPosition.translate(0, -lineHeight - 8 - 0.1),
            ],
          ),
        ),
      );

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathBoundsMatcher(
            bottomMatcher: moreOrLessEquals(selectionPosition.dy - 8 - lineHeight, epsilon: 0.01),
            topMatcher: moreOrLessEquals(selectionPosition.dy - 8 - lineHeight - 43, epsilon: 0.01),
            rightMatcher: lessThanOrEqualTo(400 - 8),
            leftMatcher: greaterThanOrEqualTo(8),
          ),
        ),
      );

      tester.binding.window.physicalSizeTestValue = null;
      tester.binding.window.devicePixelRatioTestValue = null;
    });

    testWidgets('selecting multiline works', (WidgetTester tester) async {
      EditableText.debugDeterministicCursor = true;
      tester.binding.window.physicalSizeTestValue = const Size(400, 400);
      tester.binding.window.devicePixelRatioTestValue = 1;
      TextEditingController controller;
      EditableTextState state;

      // Normal multiline collapsed selection. The toolbar arrow should point down, and
      // it should point exactly to the horizontal center of the text field.
      controller = TextEditingController(text: List<String>.filled(20, 'a  a  ').join('\n'));
      await tester.pumpWidget(
        CupertinoApp(
          debugShowCheckedModeBanner: false,
          home: CupertinoPageScaffold(
            child: Align(
              alignment: Alignment.center,
              child: SizedBox(
                width: 200,
                height: 200,
                child: CupertinoTextField(
                  controller: controller,
                  maxLines: null,
                ),
              ),
            ),
          ),
        ),
      );

      state = tester.state<EditableTextState>(find.byType(EditableText));
      final double lineHeight = state.renderEditable.preferredLineHeight;

      // Select the first 2 words.
      state.renderEditable.selectPositionAt(
        from: textOffsetToPosition(tester, 0),
        to: textOffsetToPosition(tester, 10),
        cause: SelectionChangedCause.tap,
      );
      expect(state.showToolbar(), true);
      await tester.pumpAndSettle();

      final Offset selectionPosition = Offset(
        // Toolbar should be centered.
        200,
        textOffsetToBottomLeftPosition(tester, 0).dy,
      );

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathPointsMatcher(
            includes: <Offset> [
              // Expected center of the arrow.
              selectionPosition.translate(0, -lineHeight - 8 - 0.1),
            ],
          ),
        ),
      );

      expect(
        find.byType(CupertinoTextSelectionToolbar),
        paints..clipPath(
          pathMatcher: PathBoundsMatcher(
            bottomMatcher: moreOrLessEquals(selectionPosition.dy - 8 - lineHeight, epsilon: 0.01),
            topMatcher: moreOrLessEquals(selectionPosition.dy - 8 - lineHeight - 43, epsilon: 0.01),
            rightMatcher: lessThanOrEqualTo(400 - 8),
            leftMatcher: greaterThanOrEqualTo(8),
          ),
        ),
      );

      tester.binding.window.physicalSizeTestValue = null;
      tester.binding.window.devicePixelRatioTestValue = null;
    });

    // This is a regression test for
    // https://github.com/flutter/flutter/issues/37046.
    testWidgets('No exceptions when showing selection menu inside of nested Navigators', (WidgetTester tester) async {
      const String testValue = '123456';
      final TextEditingController controller = TextEditingController(
        text: testValue,
      );
      await tester.pumpWidget(
        CupertinoApp(
          home: CupertinoPageScaffold(
            child: Center(
              child: Column(
                children: <Widget>[
                  Container(
                    height: 100,
                    color: CupertinoColors.black,
                  ),
                  Expanded(
                    child: Navigator(
                      onGenerateRoute: (_) =>
                        CupertinoPageRoute<void>(builder: (_) => Container(
                          child: CupertinoTextField(
                            controller: controller,
                          ),
                        )),
                    ),
                  ),
                ],
              ),
            ),
          ),
        ),
      );

      // No text selection toolbar.
      expect(find.byType(CupertinoTextSelectionToolbar), findsNothing);

      // Double tap on the text in the input.
      await tester.pumpAndSettle();
      await tester.tapAt(textOffsetToPosition(tester, testValue.length ~/ 2));
      await tester.pump(const Duration(milliseconds: 100));
      await tester.tapAt(textOffsetToPosition(tester, testValue.length ~/ 2));
      await tester.pumpAndSettle();

      // Now the text selection toolbar is showing and there were no exceptions.
      expect(find.byType(CupertinoTextSelectionToolbar), findsOneWidget);
      expect(tester.takeException(), null);
    });
  });

  group('textAlignVertical position', () {
    group('simple case', () {
      testWidgets('align top (default)', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The EditableText is at the top.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(206.0, .0001));
      });

      testWidgets('align center', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    textAlignVertical: TextAlignVertical.center,
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The EditableText is at the center.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(291.5, .0001));
      });

      testWidgets('align bottom', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    textAlignVertical: TextAlignVertical.bottom,
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The EditableText is at the bottom.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(377.0, .0001));
      });

      testWidgets('align as a double', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    textAlignVertical: const TextAlignVertical(y: 0.75),
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The EditableText is near the bottom.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(355.625, .0001));
      });
    });

    group('tall prefix', () {
      testWidgets('align center (default when prefix)', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                    prefix: const SizedBox(
                      height: 100,
                      width: 10,
                    ),
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it. This includes tapping on the
        // prefix, because in this case it is transparent.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The EditableText is at the center. Same as without prefix.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(291.5, .0001));
      });

      testWidgets('align top', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    textAlignVertical: TextAlignVertical.top,
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                    prefix: const SizedBox(
                      height: 100,
                      width: 10,
                    ),
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it. This includes tapping on the
        // prefix, because in this case it is transparent.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The prefix is at the top, and the EditableText is centered within its
        // height.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(241.5, .0001));
      });

      testWidgets('align bottom', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    textAlignVertical: TextAlignVertical.bottom,
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                    prefix: const SizedBox(
                      height: 100,
                      width: 10,
                    ),
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it. This includes tapping on the
        // prefix, because in this case it is transparent.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The prefix is at the bottom, and the EditableText is centered within
        // its height.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(341.5, .0001));
      });

      testWidgets('align as a double', (WidgetTester tester) async {
        final FocusNode focusNode = FocusNode();
        const Size size = Size(200.0, 200.0);
        await tester.pumpWidget(
          CupertinoApp(
            debugShowCheckedModeBanner: false,
            home: CupertinoPageScaffold(
              child: Align(
                alignment: Alignment.center,
                child: SizedBox(
                  width: size.width,
                  height: size.height,
                  child: CupertinoTextField(
                    textAlignVertical: const TextAlignVertical(y: 0.75),
                    focusNode: focusNode,
                    expands: true,
                    maxLines: null,
                    prefix: const SizedBox(
                      height: 100,
                      width: 10,
                    ),
                  ),
                ),
              ),
            ),
          ),
        );

        // Fills the whole container since expands is true.
        expect(tester.getSize(find.byType(CupertinoTextField)), size);

        // Tapping anywhere inside focuses it. This includes tapping on the
        // prefix, because in this case it is transparent.
        expect(focusNode.hasFocus, false);
        await tester.tapAt(tester.getTopLeft(find.byType(CupertinoTextField)));
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, true);
        focusNode.unfocus();
        await tester.pumpAndSettle();
        expect(focusNode.hasFocus, false);
        final Offset justInside = tester
          .getBottomLeft(find.byType(CupertinoTextField))
          .translate(0.0, -1.0);
        await tester.tapAt(justInside);
        await tester.pumpAndSettle();
        await tester.pump(const Duration(milliseconds: 300));
        expect(focusNode.hasFocus, true);

        // The EditableText is near the bottom.
        expect(tester.getTopLeft(find.byType(CupertinoTextField)).dy, closeTo(size.height, .0001));
        expect(tester.getTopLeft(find.byType(EditableText)).dy, closeTo(329.0, .0001));
      });
    });

    testWidgets(
      'Long press on an autofocused field shows the selection menu',
      (WidgetTester tester) async {
        await tester.pumpWidget(
          CupertinoApp(
            home: Center(
              child: ConstrainedBox(
                constraints: BoxConstraints.loose(const Size(200, 200)),
                child: const CupertinoTextField(
                  autofocus: true,
                ),
              ),
            ),
          ),
        );
        // This extra pump allows the selection set by autofocus to propagate to
        // the RenderEditable.
        await tester.pump();

        // Long press shows the selection menu.
        await tester.longPressAt(textOffsetToPosition(tester, 0));
        await tester.pumpAndSettle();
        expect(find.text('Paste'), findsOneWidget);
      },
    );
  });
  testWidgets("Arrow keys don't move input focus", (WidgetTester tester) async {
    final TextEditingController controller1 = TextEditingController();
    final TextEditingController controller2 = TextEditingController();
    final TextEditingController controller3 = TextEditingController();
    final TextEditingController controller4 = TextEditingController();
    final TextEditingController controller5 = TextEditingController();
    final FocusNode focusNode1 = FocusNode(debugLabel: 'Field 1');
    final FocusNode focusNode2 = FocusNode(debugLabel: 'Field 2');
    final FocusNode focusNode3 = FocusNode(debugLabel: 'Field 3');
    final FocusNode focusNode4 = FocusNode(debugLabel: 'Field 4');
    final FocusNode focusNode5 = FocusNode(debugLabel: 'Field 5');

    // Lay out text fields in a "+" formation, and focus the center one.
    await tester.pumpWidget(CupertinoApp(
      home: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Container(
                width: 100.0,
                child: CupertinoTextField(
                  controller: controller1,
                  focusNode: focusNode1,
                ),
              ),
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  Container(
                    width: 100.0,
                    child: CupertinoTextField(
                      controller: controller2,
                      focusNode: focusNode2,
                    ),
                  ),
                  Container(
                    width: 100.0,
                    child: CupertinoTextField(
                      controller: controller3,
                      focusNode: focusNode3,
                    ),
                  ),
                  Container(
                    width: 100.0,
                    child: CupertinoTextField(
                      controller: controller4,
                      focusNode: focusNode4,
                    ),
                  ),
                ],
              ),
              Container(
                width: 100.0,
                child: CupertinoTextField(
                  controller: controller5,
                  focusNode: focusNode5,
                ),
              ),
            ],
          ),
        ),
      ),
    );

    focusNode3.requestFocus();
    await tester.pump();
    expect(focusNode3.hasPrimaryFocus, isTrue);

    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
    await tester.pump();
    expect(focusNode3.hasPrimaryFocus, isTrue);

    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
    await tester.pump();
    expect(focusNode3.hasPrimaryFocus, isTrue);

    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
    await tester.pump();
    expect(focusNode3.hasPrimaryFocus, isTrue);

    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
    await tester.pump();
    expect(focusNode3.hasPrimaryFocus, isTrue);
  });

  testWidgets('Cupertino text field semantics', (WidgetTester tester) async {
    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: ConstrainedBox(
            constraints: BoxConstraints.loose(const Size(200, 200)),
            child: const CupertinoTextField(),
          ),
        ),
      ),
    );

    expect(
      tester.getSemantics(
        find.descendant(
          of: find.byType(CupertinoTextField),
          matching: find.byType(Semantics),
        ).first,
      ),
      matchesSemantics(
        isTextField: true,
        isEnabled: true,
        hasEnabledState: true,
        hasTapAction: true,
      ),
    );
  });

  testWidgets('Disabled Cupertino text field semantics', (WidgetTester tester) async {
    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: ConstrainedBox(
            constraints: BoxConstraints.loose(const Size(200, 200)),
            child: const CupertinoTextField(
              enabled: false,
            ),
          ),
        ),
      ),
    );

    expect(
      tester.getSemantics(
        find.descendant(
          of: find.byType(CupertinoTextField),
          matching: find.byType(Semantics),
        ).first,
      ),
      matchesSemantics(
        isEnabled: false,
        hasEnabledState: true,
        hasTapAction: false,
      ),
    );
  });

  testWidgets('text selection style 1', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'Atwater Peel Sherbrooke Bonaventure\nhi\nwassssup!',
    );
    await tester.pumpWidget(
       CupertinoApp(
        home: Center(
          child: RepaintBoundary(
            child: Container(
              width: 650.0,
              height: 600.0,
              decoration: const BoxDecoration(
                color: Color(0xff00ff00),
              ),
              child: Column(
                children: <Widget>[
                  CupertinoTextField(
                    key: const Key('field0'),
                    controller: controller,
                    style: const TextStyle(height: 4, color: ui.Color.fromARGB(100, 0, 0, 0)),
                    toolbarOptions: const ToolbarOptions(selectAll: true),
                    selectionHeightStyle: ui.BoxHeightStyle.includeLineSpacingTop,
                    selectionWidthStyle: ui.BoxWidthStyle.max,
                    maxLines: 3,
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );

    final Offset textfieldStart = tester.getTopLeft(find.byKey(const Key('field0')));

    await tester.longPressAt(textfieldStart + const Offset(50.0, 2.0));
    await tester.pump(const Duration(milliseconds: 150));
    // Tap the Select All button.
    await tester.tapAt(textfieldStart + const Offset(20.0, 100.0));
    await tester.pump(const Duration(milliseconds: 300));

    await expectLater(
      find.byType(CupertinoApp),
      matchesGoldenFile('text_field_golden.TextSelectionStyle.1.png'),
    );
  });

  testWidgets('text selection style 2', (WidgetTester tester) async {
    final TextEditingController controller = TextEditingController(
      text: 'Atwater Peel Sherbrooke Bonaventure\nhi\nwassssup!',
    );
    await tester.pumpWidget(
      CupertinoApp(
        home: Center(
          child: RepaintBoundary(
            child: Container(
              width: 650.0,
              height: 600.0,
              decoration: const BoxDecoration(
                color: Color(0xff00ff00),
              ),
              child: Column(
                children: <Widget>[
                  CupertinoTextField(
                    key: const Key('field0'),
                    controller: controller,
                    style: const TextStyle(height: 4, color: ui.Color.fromARGB(100, 0, 0, 0)),
                    toolbarOptions: const ToolbarOptions(selectAll: true),
                    selectionHeightStyle: ui.BoxHeightStyle.includeLineSpacingBottom,
                    selectionWidthStyle: ui.BoxWidthStyle.tight,
                    maxLines: 3,
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );

    final Offset textfieldStart = tester.getTopLeft(find.byKey(const Key('field0')));

    await tester.longPressAt(textfieldStart + const Offset(50.0, 2.0));
    await tester.pump(const Duration(milliseconds: 150));
    // Tap the Select All button.
    await tester.tapAt(textfieldStart + const Offset(20.0, 100.0));
    await tester.pump(const Duration(milliseconds: 300));

    await expectLater(
      find.byType(CupertinoApp),
      matchesGoldenFile('text_field_golden.TextSelectionStyle.2.png'),
    );
  });
}
