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

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

  testWidgets('WidgetSpan calculate correct intrinsic heights', (WidgetTester tester) async {
    // Regression test for https://github.com/flutter/flutter/issues/48679.
    await tester.pumpWidget(
      Directionality(
        textDirection: TextDirection.ltr,
        child: Center(
          child: Container(
            color: Colors.green,
            child: IntrinsicHeight(
              child: RichText(
                text: TextSpan(
                  children: <InlineSpan>[
                    const TextSpan(text: 'Start\n', style: TextStyle(height: 1.0, fontSize: 16)),
                    WidgetSpan(
                      child: Row(
                        children: const <Widget>[
                          SizedBox(height: 16, width: 16,),
                        ],
                      ),
                    ),
                    const 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(<dynamic>[
      contains('textAlign: center'),
      contains('textDirection: rtl'),
      contains('softWrap: no wrapping except at line break characters'),
      contains('overflow: ellipsis'),
      contains('textScaleFactor: 1.3'),
      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'),
      ),
    ]));
  });
}