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

void main() {
  testWidgets('RichText with recognizers without handlers does not throw', (WidgetTester tester) async {
    final TapGestureRecognizer recognizer1 = TapGestureRecognizer();
    addTearDown(recognizer1.dispose);
    final LongPressGestureRecognizer recognizer2 = LongPressGestureRecognizer();
    addTearDown(recognizer2.dispose);
    final DoubleTapGestureRecognizer recognizer3 = DoubleTapGestureRecognizer();
    addTearDown(recognizer3.dispose);

    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: RichText(
          text: TextSpan(text: 'root', children: <InlineSpan>[
            TextSpan(text: 'one', recognizer: recognizer1),
            TextSpan(text: 'two', recognizer: recognizer2),
            TextSpan(text: 'three', recognizer: recognizer3),
          ]),
        ),
      ),
    );

    expect(tester.getSemantics(find.byType(RichText)), matchesSemantics(
      children: <Matcher>[
        matchesSemantics(
          label: 'root',
        ),
        matchesSemantics(
          label: 'one',
        ),
        matchesSemantics(
          label: 'two',
        ),
        matchesSemantics(
          label: 'three',
        ),
      ],
    ));
  });

  testWidgets('TextSpan Locale works', (WidgetTester tester) async {
    final TapGestureRecognizer recognizer1 = TapGestureRecognizer();
    addTearDown(recognizer1.dispose);
    final DoubleTapGestureRecognizer recognizer2 = DoubleTapGestureRecognizer();
    addTearDown(recognizer2.dispose);

    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: RichText(
          text: TextSpan(
            text: 'root',
            locale: const Locale('es', 'MX'),
            children: <InlineSpan>[
              TextSpan(text: 'one', recognizer: recognizer1),
              const WidgetSpan(
                child: SizedBox(),
              ),
              TextSpan(text: 'three', recognizer: recognizer2),
            ]
          ),
        ),
      ),
    );
    expect(tester.getSemantics(find.byType(RichText)), matchesSemantics(
      children: <Matcher>[
        matchesSemantics(
          attributedLabel: AttributedString(
            'root',
            attributes: <StringAttribute>[
              LocaleStringAttribute(range: const TextRange(start: 0, end: 4), locale: const Locale('es', 'MX')),
            ]
          ),
        ),
        matchesSemantics(
          attributedLabel: AttributedString(
            'one',
            attributes: <StringAttribute>[
              LocaleStringAttribute(range: const TextRange(start: 0, end: 3), locale: const Locale('es', 'MX')),
            ]
          ),
        ),
        matchesSemantics(
          attributedLabel: AttributedString(
            'three',
            attributes: <StringAttribute>[
              LocaleStringAttribute(range: const TextRange(start: 0, end: 5), locale: const Locale('es', 'MX')),
            ]
          ),
        ),
      ],
    ));
  });

  testWidgets('TextSpan spellOut works', (WidgetTester tester) async {
    final TapGestureRecognizer recognizer1 = TapGestureRecognizer();
    addTearDown(recognizer1.dispose);
    final DoubleTapGestureRecognizer recognizer2 = DoubleTapGestureRecognizer();
    addTearDown(recognizer2.dispose);

    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: RichText(
          text: TextSpan(
              text: 'root',
              spellOut: true,
              children: <InlineSpan>[
                TextSpan(text: 'one', recognizer: recognizer1),
                const WidgetSpan(
                  child: SizedBox(),
                ),
                TextSpan(text: 'three', recognizer: recognizer2),
              ]
          ),
        ),
      ),
    );
    expect(tester.getSemantics(find.byType(RichText)), matchesSemantics(
      children: <Matcher>[
        matchesSemantics(
          attributedLabel: AttributedString(
              'root',
              attributes: <StringAttribute>[
                SpellOutStringAttribute(range: const TextRange(start: 0, end: 4)),
              ]
          ),
        ),
        matchesSemantics(
          attributedLabel: AttributedString(
              'one',
              attributes: <StringAttribute>[
                SpellOutStringAttribute(range: const TextRange(start: 0, end: 3)),
              ]
          ),
        ),
        matchesSemantics(
          attributedLabel: AttributedString(
              'three',
              attributes: <StringAttribute>[
                SpellOutStringAttribute(range: const TextRange(start: 0, end: 5)),
              ]
          ),
        ),
      ],
    ));
  });

  testWidgets('WidgetSpan calculate correct intrinsic heights', (WidgetTester tester) async {
    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: ColoredBox(
            color: Colors.green,
            child: IntrinsicHeight(
              child: RichText(
                text: const TextSpan(
                  children: <InlineSpan>[
                    TextSpan(text: 'Start\n', style: TextStyle(height: 1.0, fontSize: 16)),
                    WidgetSpan(
                      child: Row(
                        children: <Widget>[
                          SizedBox(height: 16, width: 16),
                        ],
                      ),
                    ),
                    TextSpan(text: 'End', style: TextStyle(height: 1.0, fontSize: 16)),
                  ],
                ),
              ),
            ),
          ),
        ),
      ),
    );

    expect(tester.getSize(find.byType(IntrinsicHeight)).height, 3 * 16);
  });

  testWidgets('RichText implements debugFillProperties', (WidgetTester tester) async {
    final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
    RichText(
      text: const TextSpan(text: 'rich text'),
      textAlign: TextAlign.center,
      textDirection: TextDirection.rtl,
      softWrap: false,
      overflow: TextOverflow.ellipsis,
      textScaleFactor: 1.3,
      maxLines: 1,
      locale: const Locale('zh', 'HK'),
      strutStyle: const StrutStyle(
        fontSize: 16,
      ),
      textWidthBasis: TextWidthBasis.longestLine,
      textHeightBehavior: const TextHeightBehavior(applyHeightToFirstAscent: false),
    ).debugFillProperties(builder);

    final List<String> description = builder.properties
      .where((DiagnosticsNode node) => !node.isFiltered(DiagnosticLevel.info))
      .map((DiagnosticsNode node) => node.toString())
      .toList();

    expect(description, unorderedMatches(<Matcher>[
      contains('textAlign: center'),
      contains('textDirection: rtl'),
      contains('softWrap: no wrapping except at line break characters'),
      contains('overflow: ellipsis'),
      contains('textScaler: linear (1.3x)'),
      contains('maxLines: 1'),
      contains('textWidthBasis: longestLine'),
      contains('text: "rich text"'),
      contains('locale: zh_HK'),
      allOf(startsWith('strutStyle: StrutStyle('), contains('size: 16.0')),
      allOf(
        startsWith('textHeightBehavior: TextHeightBehavior('),
        contains('applyHeightToFirstAscent: false'),
        contains('applyHeightToLastDescent: true'),
      ),
    ]));
  });
}