flutter_flutter/packages/flutter/test/widgets/image_icon_test.dart

// 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.

import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';

import '../painting/mocks_for_image_cache.dart';

void main() {
  late ImageProvider image;

  setUpAll(() async {
    image = TestImageProvider(21, 42, image: await createTestImage(width: 10, height: 10));
  });

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

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

    imageCache.clear();
  });

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

    expect(tester.widget<Image>(find.byType(Image)).color!.alpha, equals(128));

    imageCache.clear();
  });

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

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

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

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

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

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

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

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

  testWidgets('ImageIcon has semantics data', (WidgetTester tester) async {
    final SemanticsHandle handle = tester.ensureSemantics();
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: IconTheme(
            data: IconThemeData(),
            child: ImageIcon(null, semanticLabel: 'test'),
          ),
        ),
      ),
    );

    expect(
      tester.getSemantics(find.byType(ImageIcon)),
      matchesSemantics(label: 'test', textDirection: TextDirection.ltr),
    );
    handle.dispose();
  });
}