// Copyright 2016 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'package:flutter/widgets.dart'; import 'package:flutter_test/flutter_test.dart'; const List<Widget> fooBarTexts = const <Text>[ const Text('foo', textDirection: TextDirection.ltr), const Text('bar', textDirection: TextDirection.ltr), ]; void main() { group('findsOneWidget', () { testWidgets('finds exactly one widget', (WidgetTester tester) async { await tester.pumpWidget(const Text('foo', textDirection: TextDirection.ltr)); expect(find.text('foo'), findsOneWidget); }); testWidgets('fails with a descriptive message', (WidgetTester tester) async { TestFailure failure; try { expect(find.text('foo', skipOffstage: false), findsOneWidget); } catch(e) { failure = e; } expect(failure, isNotNull); final String message = failure.message; expect(message, contains('Expected: exactly one matching node in the widget tree\n')); expect(message, contains('Actual: ?:<zero widgets with text "foo">\n')); expect(message, contains('Which: means none were found but one was expected\n')); }); }); group('findsNothing', () { testWidgets('finds no widgets', (WidgetTester tester) async { expect(find.text('foo'), findsNothing); }); testWidgets('fails with a descriptive message', (WidgetTester tester) async { await tester.pumpWidget(const Text('foo', textDirection: TextDirection.ltr)); TestFailure failure; try { expect(find.text('foo', skipOffstage: false), findsNothing); } catch(e) { failure = e; } expect(failure, isNotNull); final String message = failure.message; expect(message, contains('Expected: no matching nodes in the widget tree\n')); expect(message, contains('Actual: ?:<exactly one widget with text "foo": Text("foo", textDirection: ltr)>\n')); expect(message, contains('Which: means one was found but none were expected\n')); }); testWidgets('fails with a descriptive message when skipping', (WidgetTester tester) async { await tester.pumpWidget(const Text('foo', textDirection: TextDirection.ltr)); TestFailure failure; try { expect(find.text('foo'), findsNothing); } catch(e) { failure = e; } expect(failure, isNotNull); final String message = failure.message; expect(message, contains('Expected: no matching nodes in the widget tree\n')); expect(message, contains('Actual: ?:<exactly one widget with text "foo" (ignoring offstage widgets): Text("foo", textDirection: ltr)>\n')); expect(message, contains('Which: means one was found but none were expected\n')); }); testWidgets('pumping', (WidgetTester tester) async { await tester.pumpWidget(const Text('foo', textDirection: TextDirection.ltr)); int count; final AnimationController test = new AnimationController( duration: const Duration(milliseconds: 5100), vsync: tester, ); count = await tester.pumpAndSettle(const Duration(seconds: 1)); expect(count, 1); // it always pumps at least one frame test.forward(from: 0.0); count = await tester.pumpAndSettle(const Duration(seconds: 1)); // 1 frame at t=0, starting the animation // 1 frame at t=1 // 1 frame at t=2 // 1 frame at t=3 // 1 frame at t=4 // 1 frame at t=5 // 1 frame at t=6, ending the animation expect(count, 7); test.forward(from: 0.0); await tester.pump(); // starts the animation count = await tester.pumpAndSettle(const Duration(seconds: 1)); expect(count, 6); test.forward(from: 0.0); await tester.pump(); // starts the animation await tester.pump(); // has no effect count = await tester.pumpAndSettle(const Duration(seconds: 1)); expect(count, 6); }); }); group('find.byElementPredicate', () { testWidgets('fails with a custom description in the message', (WidgetTester tester) async { await tester.pumpWidget(const Text('foo', textDirection: TextDirection.ltr)); final String customDescription = 'custom description'; TestFailure failure; try { expect(find.byElementPredicate((_) => false, description: customDescription), findsOneWidget); } catch(e) { failure = e; } expect(failure, isNotNull); expect(failure.message, contains('Actual: ?:<zero widgets with $customDescription')); }); }); group('find.byWidgetPredicate', () { testWidgets('fails with a custom description in the message', (WidgetTester tester) async { await tester.pumpWidget(const Text('foo', textDirection: TextDirection.ltr)); final String customDescription = 'custom description'; TestFailure failure; try { expect(find.byWidgetPredicate((_) => false, description: customDescription), findsOneWidget); } catch(e) { failure = e; } expect(failure, isNotNull); expect(failure.message, contains('Actual: ?:<zero widgets with $customDescription')); }); }); group('find.descendant', () { testWidgets('finds one descendant', (WidgetTester tester) async { await tester.pumpWidget(new Row( textDirection: TextDirection.ltr, children: <Widget>[ new Column(children: fooBarTexts), ], )); expect(find.descendant( of: find.widgetWithText(Row, 'foo'), matching: find.text('bar'), ), findsOneWidget); }); testWidgets('finds two descendants with different ancestors', (WidgetTester tester) async { await tester.pumpWidget(new Row( textDirection: TextDirection.ltr, children: <Widget>[ new Column(children: fooBarTexts), new Column(children: fooBarTexts), ], )); expect(find.descendant( of: find.widgetWithText(Column, 'foo'), matching: find.text('bar'), ), findsNWidgets(2)); }); testWidgets('fails with a descriptive message', (WidgetTester tester) async { await tester.pumpWidget(new Row( textDirection: TextDirection.ltr, children: <Widget>[ new Column(children: const <Text>[const Text('foo', textDirection: TextDirection.ltr)]), const Text('bar', textDirection: TextDirection.ltr), ], )); TestFailure failure; try { expect(find.descendant( of: find.widgetWithText(Column, 'foo'), matching: find.text('bar') ), findsOneWidget); } catch (e) { failure = e; } expect(failure, isNotNull); expect( failure.message, contains('Actual: ?:<zero widgets with text "bar" that has ancestor(s) with type Column with text "foo"') ); }); }); group('find.ancestor', () { testWidgets('finds one ancestor', (WidgetTester tester) async { await tester.pumpWidget(new Row( textDirection: TextDirection.ltr, children: <Widget>[ new Column(children: fooBarTexts), ], )); expect(find.ancestor( of: find.text('bar'), matching: find.widgetWithText(Row, 'foo'), ), findsOneWidget); }); testWidgets('finds two matching ancestors, one descendant', (WidgetTester tester) async { await tester.pumpWidget( new Directionality( textDirection: TextDirection.ltr, child: new Row( children: <Widget>[ new Row(children: fooBarTexts), ], ), ), ); expect(find.ancestor( of: find.text('bar'), matching: find.byType(Row), ), findsNWidgets(2)); }); testWidgets('fails with a descriptive message', (WidgetTester tester) async { await tester.pumpWidget(new Row( textDirection: TextDirection.ltr, children: <Widget>[ new Column(children: const <Text>[const Text('foo', textDirection: TextDirection.ltr)]), const Text('bar', textDirection: TextDirection.ltr), ], )); TestFailure failure; try { expect(find.ancestor( of: find.text('bar'), matching: find.widgetWithText(Column, 'foo'), ), findsOneWidget); } catch (e) { failure = e; } expect(failure, isNotNull); expect( failure.message, contains('Actual: ?:<zero widgets with type Column with text "foo" which is an ancestor of text "bar"'), ); }); testWidgets('Root not matched by default', (WidgetTester tester) async { await tester.pumpWidget(new Row( textDirection: TextDirection.ltr, children: <Widget>[ new Column(children: fooBarTexts), ], )); expect(find.ancestor( of: find.byType(Column), matching: find.widgetWithText(Column, 'foo'), ), findsNothing); }); testWidgets('Match the root', (WidgetTester tester) async { await tester.pumpWidget(new Row( textDirection: TextDirection.ltr, children: <Widget>[ new Column(children: fooBarTexts), ], )); expect(find.descendant( of: find.byType(Column), matching: find.widgetWithText(Column, 'foo'), matchRoot: true, ), findsOneWidget); }); }); testWidgets('hasRunningAnimations control test', (WidgetTester tester) async { final AnimationController controller = new AnimationController( duration: const Duration(seconds: 1), vsync: const TestVSync() ); expect(tester.hasRunningAnimations, isFalse); controller.forward(); expect(tester.hasRunningAnimations, isTrue); controller.stop(); expect(tester.hasRunningAnimations, isFalse); controller.forward(); expect(tester.hasRunningAnimations, isTrue); await tester.pumpAndSettle(); expect(tester.hasRunningAnimations, isFalse); }); testWidgets('pumpAndSettle control test', (WidgetTester tester) async { final AnimationController controller = new AnimationController( duration: const Duration(minutes: 525600), vsync: const TestVSync() ); expect(await tester.pumpAndSettle(), 1); controller.forward(); try { await tester.pumpAndSettle(); expect(true, isFalse); } catch (e) { expect(e, isFlutterError); } controller.stop(); expect(await tester.pumpAndSettle(), 1); controller.duration = const Duration(seconds: 1); controller.forward(); expect(await tester.pumpAndSettle(const Duration(milliseconds: 300)), 5); // 0, 300, 600, 900, 1200ms }); }