flutter_flutter/packages/flutter/test/widgets/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/material.dart';
import 'package:flutter_test/flutter_test.dart';

import 'semantics_tester.dart';

void main() {
  testWidgets('Can set opacity for an Icon', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: IconTheme(
          data: IconThemeData(
            color: Color(0xFF666666),
            opacity: 0.5,
          ),
          child: Icon(IconData(0xd0a0, fontFamily: 'Arial')),
        ),
      ),
    );
    final RichText text = tester.widget(find.byType(RichText));
    expect(text.text.style!.color, const Color(0xFF666666).withOpacity(0.5));
  });

  testWidgets('Icon sizing - no theme, default size', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: Icon(null),
        ),
      ),
    );

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

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

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

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

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

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

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

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

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


  testWidgets('Icon with custom font', (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: Icon(IconData(0x41, fontFamily: 'Roboto')),
        ),
      ),
    );

    final RichText richText = tester.firstWidget(find.byType(RichText));
    expect(richText.text.style!.fontFamily, equals('Roboto'));
  });

  testWidgets('Icon with semantic label', (WidgetTester tester) async {
    final SemanticsTester semantics = SemanticsTester(tester);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: Icon(
            Icons.title,
            semanticLabel: 'a label',
          ),
        ),
      ),
    );

    expect(semantics, includesNodeWith(label: 'a label'));

    semantics.dispose();
  });

  testWidgets('Null icon with semantic label', (WidgetTester tester) async {
    final SemanticsTester semantics = SemanticsTester(tester);

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: Icon(
            null,
            semanticLabel: 'a label',
          ),
        ),
      ),
    );

    expect(semantics, includesNodeWith(label: 'a label'));

    semantics.dispose();
  });

  testWidgets("Changing semantic label from null doesn't rebuild tree ", (WidgetTester tester) async {
    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: Icon(Icons.time_to_leave),
        ),
      ),
    );

    final Element richText1 = tester.element(find.byType(RichText));

    await tester.pumpWidget(
      const Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: Icon(
            Icons.time_to_leave,
            semanticLabel: 'a label',
          ),
        ),
      ),
    );

    final Element richText2 = tester.element(find.byType(RichText));

    // Compare a leaf Element in the Icon subtree before and after changing the
    // semanticLabel to make sure the subtree was not rebuilt.
    expect(richText2, same(richText1));
  });

  testWidgets('IconData comparison', (WidgetTester tester) async {
    expect(const IconData(123), const IconData(123));
    expect(const IconData(123), isNot(const IconData(123, matchTextDirection: true)));
    expect(const IconData(123), isNot(const IconData(123, fontFamily: 'f')));
    expect(const IconData(123), isNot(const IconData(123, fontPackage: 'p')));
    expect(const IconData(123).hashCode, const IconData(123).hashCode);
    expect(const IconData(123).hashCode, isNot(const IconData(123, matchTextDirection: true).hashCode));
    expect(const IconData(123).hashCode, isNot(const IconData(123, fontFamily: 'f').hashCode));
    expect(const IconData(123).hashCode, isNot(const IconData(123, fontPackage: 'p').hashCode));
    expect(const IconData(123).toString(), 'IconData(U+0007B)');
  });
}