image_icon_test.dart 2.88 KB
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// Copyright 2015 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/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';

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import '../painting/mocks_for_image_cache.dart';
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const ImageProvider _kImage = const TestImageProvider(21, 42);

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void main() {
  testWidgets('ImageIcon sizing - no theme, default size', (WidgetTester tester) async {
    await tester.pumpWidget(
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      const Center(
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        child: const ImageIcon(_kImage)
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      )
    );

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    final RenderBox renderObject = tester.renderObject(find.byType(ImageIcon));
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    expect(renderObject.size, equals(const Size.square(24.0)));
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    expect(find.byType(Image), findsOneWidget);
  });

  testWidgets('Icon opacity', (WidgetTester tester) async {
    await tester.pumpWidget(
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      const Center(
        child: const IconTheme(
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          data: const IconThemeData(opacity: 0.5),
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          child: const ImageIcon(_kImage),
        ),
      ),
    );

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    final Image image = tester.widget(find.byType(Image));
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    expect(image, isNotNull);
    expect(image.color.alpha, equals(128));
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  });

  testWidgets('ImageIcon sizing - no theme, explicit size', (WidgetTester tester) async {
    await tester.pumpWidget(
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      const Center(
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        child: const ImageIcon(
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          null,
          size: 96.0
        )
      )
    );

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    final RenderBox renderObject = tester.renderObject(find.byType(ImageIcon));
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    expect(renderObject.size, equals(const Size.square(96.0)));
  });

  testWidgets('ImageIcon sizing - sized theme', (WidgetTester tester) async {
    await tester.pumpWidget(
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      const Center(
        child: const IconTheme(
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          data: const IconThemeData(size: 36.0),
          child: const ImageIcon(null)
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        )
      )
    );

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    final RenderBox renderObject = tester.renderObject(find.byType(ImageIcon));
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    expect(renderObject.size, equals(const Size.square(36.0)));
  });

  testWidgets('ImageIcon sizing - sized theme, explicit size', (WidgetTester tester) async {
    await tester.pumpWidget(
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      const Center(
        child: const IconTheme(
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          data: const IconThemeData(size: 36.0),
          child: const ImageIcon(
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            null,
            size: 48.0
          )
        )
      )
    );

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    final RenderBox renderObject = tester.renderObject(find.byType(ImageIcon));
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    expect(renderObject.size, equals(const Size.square(48.0)));
  });

  testWidgets('ImageIcon sizing - sizeless theme, default size', (WidgetTester tester) async {
    await tester.pumpWidget(
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      const Center(
        child: const IconTheme(
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          data: const IconThemeData(),
          child: const ImageIcon(null)
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        )
      )
    );

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    final RenderBox renderObject = tester.renderObject(find.byType(ImageIcon));
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    expect(renderObject.size, equals(const Size.square(24.0)));
  });
}