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// 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 'dart:ui' as ui show FontFeature, FontVariation, ParagraphStyle, Shadow, TextStyle;
import 'package:flutter/foundation.dart';
import 'package:flutter/painting.dart';
import 'package:flutter_test/flutter_test.dart';
// This matcher verifies ui.TextStyle.toString (from dart:ui) reports a superset
// of the given TextStyle's (from painting.dart) properties.
class _DartUiTextStyleToStringMatcher extends Matcher {
_DartUiTextStyleToStringMatcher(this.textStyle);
final TextStyle textStyle;
late final List<String> propertiesInOrder = <String>[
_propertyToString('color', textStyle.color),
_propertyToString('decoration', textStyle.decoration),
_propertyToString('decorationColor', textStyle.decorationColor),
_propertyToString('decorationStyle', textStyle.decorationStyle),
_propertyToString('decorationThickness', textStyle.decorationThickness),
_propertyToString('fontWeight', textStyle.fontWeight),
_propertyToString('fontStyle', textStyle.fontStyle),
_propertyToString('textBaseline', textStyle.textBaseline),
_propertyToString('fontFamily', textStyle.fontFamily),
_propertyToString('fontFamilyFallback', textStyle.fontFamilyFallback),
_propertyToString('fontSize', textStyle.fontSize),
_propertyToString('letterSpacing', textStyle.letterSpacing),
_propertyToString('wordSpacing', textStyle.wordSpacing),
_propertyToString('height', textStyle.height),
// TODO(LongCatIsLooong): web support for
// https://github.com/flutter/flutter/issues/72521
if (!kIsWeb) _propertyToString('leadingDistribution', textStyle.leadingDistribution),
_propertyToString('locale', textStyle.locale),
_propertyToString('background', textStyle.background),
_propertyToString('foreground', textStyle.foreground),
_propertyToString('shadows', textStyle.shadows),
_propertyToString('fontFeatures', textStyle.fontFeatures),
_propertyToString('fontVariations', textStyle.fontVariations),
];
static String _propertyToString(String name, Object? property) => '$name: ${property ?? 'unspecified'}';
@override
Description describe(Description description) => description.add('is a superset of $textStyle.');
@override
bool matches(dynamic item, Map<dynamic, dynamic> matchState) {
final String description = item.toString();
const String prefix = 'TextStyle(';
const String suffix = ')';
if (!description.startsWith(prefix) || !description.endsWith(suffix)) {
return false;
}
final String propertyDescription = description.substring(
prefix.length,
description.length - suffix.length,
);
int startIndex = 0;
for (final String property in propertiesInOrder) {
startIndex = propertyDescription.indexOf(property, startIndex);
if (startIndex < 0) {
matchState['missingProperty'] = property;
return false;
}
startIndex += property.length;
}
return true;
}
@override
Description describeMismatch(dynamic item, Description mismatchDescription, Map<dynamic, dynamic> matchState, bool verbose) {
final Description description = super.describeMismatch(item, mismatchDescription, matchState, verbose);
final String? property = matchState['missingProperty'] as String?;
if (property != null) {
description.add("expect property: '$property'");
final int propertyIndex = propertiesInOrder.indexOf(property);
if (propertyIndex > 0) {
description.add(" after: '${propertiesInOrder[propertyIndex - 1]}'");
}
description.add('\n');
}
return description;
}
}
Matcher matchesToStringOf(TextStyle textStyle) => _DartUiTextStyleToStringMatcher(textStyle);
void main() {
test('TextStyle control test', () {
expect(
const TextStyle(inherit: false).toString(),
equals('TextStyle(inherit: false, <no style specified>)'),
);
expect(
const TextStyle().toString(),
equals('TextStyle(<all styles inherited>)'),
);
const TextStyle s1 = TextStyle(
fontSize: 10.0,
fontWeight: FontWeight.w800,
height: 123.0,
);
expect(s1.fontFamily, isNull);
expect(s1.fontSize, 10.0);
expect(s1.fontWeight, FontWeight.w800);
expect(s1.height, 123.0);
expect(s1, equals(s1));
expect(
s1.toString(),
equals('TextStyle(inherit: true, size: 10.0, weight: 800, height: 123.0x)'),
);
// Check that the inherit flag can be set with copyWith().
expect(
s1.copyWith(inherit: false).toString(),
equals('TextStyle(inherit: false, size: 10.0, weight: 800, height: 123.0x)'),
);
final TextStyle s2 = s1.copyWith(
color: const Color(0xFF00FF00),
height: 100.0,
leadingDistribution: TextLeadingDistribution.even,
);
expect(s1.fontFamily, isNull);
expect(s1.fontSize, 10.0);
expect(s1.fontWeight, FontWeight.w800);
expect(s1.height, 123.0);
expect(s1.color, isNull);
expect(s2.fontFamily, isNull);
expect(s2.fontSize, 10.0);
expect(s2.fontWeight, FontWeight.w800);
expect(s2.height, 100.0);
expect(s2.color, const Color(0xFF00FF00));
expect(s2.leadingDistribution, TextLeadingDistribution.even);
expect(s2, isNot(equals(s1)));
expect(
s2.toString(),
equals(
'TextStyle(inherit: true, color: Color(0xff00ff00), size: 10.0, weight: 800, height: 100.0x, leadingDistribution: even)',
),
);
final TextStyle s3 = s1.apply(fontSizeFactor: 2.0, fontSizeDelta: -2.0, fontWeightDelta: -4);
expect(s1.fontFamily, isNull);
expect(s1.fontSize, 10.0);
expect(s1.fontWeight, FontWeight.w800);
expect(s1.height, 123.0);
expect(s1.color, isNull);
expect(s3.fontFamily, isNull);
expect(s3.fontSize, 18.0);
expect(s3.fontWeight, FontWeight.w400);
expect(s3.height, 123.0);
expect(s3.color, isNull);
expect(s3, isNot(equals(s1)));
expect(s1.apply(fontWeightDelta: -10).fontWeight, FontWeight.w100);
expect(s1.apply(fontWeightDelta: 2).fontWeight, FontWeight.w900);
expect(s1.merge(null), equals(s1));
final TextStyle s4 = s2.merge(s1);
expect(s1.fontFamily, isNull);
expect(s1.fontSize, 10.0);
expect(s1.fontWeight, FontWeight.w800);
expect(s1.height, 123.0);
expect(s1.color, isNull);
expect(s2.fontFamily, isNull);
expect(s2.fontSize, 10.0);
expect(s2.fontWeight, FontWeight.w800);
expect(s2.height, 100.0);
expect(s2.color, const Color(0xFF00FF00));
expect(s2.leadingDistribution, TextLeadingDistribution.even);
expect(s2, isNot(equals(s1)));
expect(s2, isNot(equals(s4)));
expect(s4.fontFamily, isNull);
expect(s4.fontSize, 10.0);
expect(s4.fontWeight, FontWeight.w800);
expect(s4.height, 123.0);
expect(s4.color, const Color(0xFF00FF00));
expect(s4.leadingDistribution, TextLeadingDistribution.even);
final TextStyle s5 = TextStyle.lerp(s1, s3, 0.25)!;
expect(s1.fontFamily, isNull);
expect(s1.fontSize, 10.0);
expect(s1.fontWeight, FontWeight.w800);
expect(s1.height, 123.0);
expect(s1.color, isNull);
expect(s3.fontFamily, isNull);
expect(s3.fontSize, 18.0);
expect(s3.fontWeight, FontWeight.w400);
expect(s3.height, 123.0);
expect(s3.color, isNull);
expect(s3, isNot(equals(s1)));
expect(s3, isNot(equals(s5)));
expect(s5.fontFamily, isNull);
expect(s5.fontSize, 12.0);
expect(s5.fontWeight, FontWeight.w700);
expect(s5.height, 123.0);
expect(s5.color, isNull);
expect(TextStyle.lerp(null, null, 0.5), isNull);
final TextStyle s6 = TextStyle.lerp(null, s3, 0.25)!;
expect(s3.fontFamily, isNull);
expect(s3.fontSize, 18.0);
expect(s3.fontWeight, FontWeight.w400);
expect(s3.height, 123.0);
expect(s3.color, isNull);
expect(s3, isNot(equals(s6)));
expect(s6.fontFamily, isNull);
expect(s6.fontSize, isNull);
expect(s6.fontWeight, FontWeight.w400);
expect(s6.height, isNull);
expect(s6.color, isNull);
final TextStyle s7 = TextStyle.lerp(null, s3, 0.75)!;
expect(s3.fontFamily, isNull);
expect(s3.fontSize, 18.0);
expect(s3.fontWeight, FontWeight.w400);
expect(s3.height, 123.0);
expect(s3.color, isNull);
expect(s3, equals(s7));
expect(s7.fontFamily, isNull);
expect(s7.fontSize, 18.0);
expect(s7.fontWeight, FontWeight.w400);
expect(s7.height, 123.0);
expect(s7.color, isNull);
final TextStyle s8 = TextStyle.lerp(s3, null, 0.25)!;
expect(s3.fontFamily, isNull);
expect(s3.fontSize, 18.0);
expect(s3.fontWeight, FontWeight.w400);
expect(s3.height, 123.0);
expect(s3.color, isNull);
expect(s3, equals(s8));
expect(s8.fontFamily, isNull);
expect(s8.fontSize, 18.0);
expect(s8.fontWeight, FontWeight.w400);
expect(s8.height, 123.0);
expect(s8.color, isNull);
final TextStyle s9 = TextStyle.lerp(s3, null, 0.75)!;
expect(s3.fontFamily, isNull);
expect(s3.fontSize, 18.0);
expect(s3.fontWeight, FontWeight.w400);
expect(s3.height, 123.0);
expect(s3.color, isNull);
expect(s3, isNot(equals(s9)));
expect(s9.fontFamily, isNull);
expect(s9.fontSize, isNull);
expect(s9.fontWeight, FontWeight.w400);
expect(s9.height, isNull);
expect(s9.color, isNull);
final ui.TextStyle ts5 = s5.getTextStyle();
expect(ts5, equals(ui.TextStyle(fontWeight: FontWeight.w700, fontSize: 12.0, height: 123.0)));
expect(ts5, matchesToStringOf(s5));
final ui.TextStyle ts2 = s2.getTextStyle();
expect(ts2, equals(ui.TextStyle(color: const Color(0xFF00FF00), fontWeight: FontWeight.w800, fontSize: 10.0, height: 100.0, leadingDistribution: TextLeadingDistribution.even)));
expect(ts2, matchesToStringOf(s2));
final ui.ParagraphStyle ps2 = s2.getParagraphStyle(textAlign: TextAlign.center);
expect(
ps2,
equals(ui.ParagraphStyle(textAlign: TextAlign.center, fontWeight: FontWeight.w800, fontSize: 10.0, height: 100.0, textHeightBehavior: const TextHeightBehavior(leadingDistribution: TextLeadingDistribution.even))),
);
final ui.ParagraphStyle ps5 = s5.getParagraphStyle();
expect(
ps5,
equals(ui.ParagraphStyle(fontWeight: FontWeight.w700, fontSize: 12.0, height: 123.0)),
);
});
test('TextStyle with text direction', () {
final ui.ParagraphStyle ps6 = const TextStyle().getParagraphStyle(textDirection: TextDirection.ltr);
expect(ps6, equals(ui.ParagraphStyle(textDirection: TextDirection.ltr, fontSize: 14.0)));
final ui.ParagraphStyle ps7 = const TextStyle().getParagraphStyle(textDirection: TextDirection.rtl);
expect(ps7, equals(ui.ParagraphStyle(textDirection: TextDirection.rtl, fontSize: 14.0)));
});
test('TextStyle using package font', () {
const TextStyle s6 = TextStyle(fontFamily: 'test');
expect(s6.fontFamily, 'test');
expect(s6.getTextStyle(), matchesToStringOf(s6));
const TextStyle s7 = TextStyle(fontFamily: 'test', package: 'p');
expect(s7.fontFamily, 'packages/p/test');
expect(s7.getTextStyle(), matchesToStringOf(s7));
const TextStyle s8 = TextStyle(fontFamilyFallback: <String>['test', 'test2'], package: 'p');
expect(s8.fontFamilyFallback![0], 'packages/p/test');
expect(s8.fontFamilyFallback![1], 'packages/p/test2');
expect(s8.fontFamilyFallback!.length, 2);
const TextStyle s9 = TextStyle(package: 'p');
expect(s9.fontFamilyFallback, null);
const TextStyle s10 = TextStyle(fontFamilyFallback: <String>[], package: 'p');
expect(s10.fontFamilyFallback, <String>[]);
// Ensure that package prefix is not duplicated after copying.
final TextStyle s11 = s8.copyWith();
expect(s11.fontFamilyFallback![0], 'packages/p/test');
expect(s11.fontFamilyFallback![1], 'packages/p/test2');
expect(s11.fontFamilyFallback!.length, 2);
expect(s8, s11);
// Ensure that package prefix is not duplicated after applying.
final TextStyle s12 = s8.apply();
expect(s12.fontFamilyFallback![0], 'packages/p/test');
expect(s12.fontFamilyFallback![1], 'packages/p/test2');
expect(s12.fontFamilyFallback!.length, 2);
expect(s8, s12);
});
test('TextStyle package font merge', () {
const TextStyle s1 = TextStyle(package: 'p', fontFamily: 'font1', fontFamilyFallback: <String>['fallback1']);
const TextStyle s2 = TextStyle(package: 'p', fontFamily: 'font2', fontFamilyFallback: <String>['fallback2']);
final TextStyle emptyMerge = const TextStyle().merge(s1);
expect(emptyMerge.fontFamily, 'packages/p/font1');
expect(emptyMerge.fontFamilyFallback, <String>['packages/p/fallback1']);
final TextStyle lerp1 = TextStyle.lerp(s1, s2, 0)!;
expect(lerp1.fontFamily, 'packages/p/font1');
expect(lerp1.fontFamilyFallback, <String>['packages/p/fallback1']);
final TextStyle lerp2 = TextStyle.lerp(s1, s2, 1.0)!;
expect(lerp2.fontFamily, 'packages/p/font2');
expect(lerp2.fontFamilyFallback, <String>['packages/p/fallback2']);
});
test('TextStyle font family fallback', () {
const TextStyle s1 = TextStyle(fontFamilyFallback: <String>['Roboto', 'test']);
expect(s1.fontFamilyFallback![0], 'Roboto');
expect(s1.fontFamilyFallback![1], 'test');
expect(s1.fontFamilyFallback!.length, 2);
const TextStyle s2 = TextStyle(fontFamily: 'foo', fontFamilyFallback: <String>['Roboto', 'test']);
expect(s2.fontFamilyFallback![0], 'Roboto');
expect(s2.fontFamilyFallback![1], 'test');
expect(s2.fontFamily, 'foo');
expect(s2.fontFamilyFallback!.length, 2);
const TextStyle s3 = TextStyle(fontFamily: 'foo');
expect(s3.fontFamily, 'foo');
expect(s3.fontFamilyFallback, null);
const TextStyle s4 = TextStyle(fontFamily: 'foo', fontFamilyFallback: <String>[]);
expect(s4.fontFamily, 'foo');
expect(s4.fontFamilyFallback, <String>[]);
expect(s4.fontFamilyFallback!.isEmpty, true);
final ui.TextStyle uis1 = s2.getTextStyle();
expect(uis1, matchesToStringOf(s2));
expect(s2.apply().fontFamily, 'foo');
expect(s2.apply().fontFamilyFallback, const <String>['Roboto', 'test']);
expect(s2.apply(fontFamily: 'bar').fontFamily, 'bar');
expect(s2.apply(fontFamilyFallback: const <String>['Banana']).fontFamilyFallback, const <String>['Banana']);
});
test('TextStyle.debugLabel', () {
const TextStyle unknown = TextStyle();
const TextStyle foo = TextStyle(debugLabel: 'foo', fontSize: 1.0);
const TextStyle bar = TextStyle(debugLabel: 'bar', fontSize: 2.0);
const TextStyle baz = TextStyle(debugLabel: 'baz', fontSize: 3.0);
expect(unknown.debugLabel, null);
expect(unknown.toString(), 'TextStyle(<all styles inherited>)');
expect(unknown.copyWith().debugLabel, null);
expect(unknown.apply().debugLabel, null);
expect(foo.debugLabel, 'foo');
expect(foo.toString(), 'TextStyle(debugLabel: foo, inherit: true, size: 1.0)');
expect(foo.merge(bar).debugLabel, '(foo).merge(bar)');
expect(foo.merge(bar).merge(baz).debugLabel, '((foo).merge(bar)).merge(baz)');
expect(foo.copyWith().debugLabel, '(foo).copyWith');
expect(foo.apply().debugLabel, '(foo).apply');
expect(TextStyle.lerp(foo, bar, 0.5)!.debugLabel, 'lerp(foo ⎯0.5→ bar)');
expect(TextStyle.lerp(foo.merge(bar), baz, 0.51)!.copyWith().debugLabel, '(lerp((foo).merge(bar) ⎯0.5→ baz)).copyWith');
});
test('TextStyle.hashCode', () {
const TextStyle a = TextStyle(
fontFamilyFallback: <String>['Roboto'],
shadows: <ui.Shadow>[ui.Shadow()],
fontFeatures: <ui.FontFeature>[ui.FontFeature('abcd')],
fontVariations: <ui.FontVariation>[ui.FontVariation('wght', 123.0)],
);
const TextStyle b = TextStyle(
fontFamilyFallback: <String>['Noto'],
shadows: <ui.Shadow>[ui.Shadow()],
fontFeatures: <ui.FontFeature>[ui.FontFeature('abcd')],
fontVariations: <ui.FontVariation>[ui.FontVariation('wght', 123.0)],
);
expect(a.hashCode, a.hashCode);
expect(a.hashCode, isNot(equals(b.hashCode)));
const TextStyle c = TextStyle(leadingDistribution: TextLeadingDistribution.even);
const TextStyle d = TextStyle(leadingDistribution: TextLeadingDistribution.proportional);
expect(c.hashCode, c.hashCode);
expect(c.hashCode, isNot(d.hashCode));
});
test('TextStyle foreground and color combos', () {
const Color red = Color.fromARGB(255, 255, 0, 0);
const Color blue = Color.fromARGB(255, 0, 0, 255);
const TextStyle redTextStyle = TextStyle(color: red);
const TextStyle blueTextStyle = TextStyle(color: blue);
final TextStyle redPaintTextStyle = TextStyle(foreground: Paint()..color = red);
final TextStyle bluePaintTextStyle = TextStyle(foreground: Paint()..color = blue);
// merge/copyWith
final TextStyle redBlueBothForegroundMerged = redTextStyle.merge(blueTextStyle);
expect(redBlueBothForegroundMerged.color, blue);
expect(redBlueBothForegroundMerged.foreground, isNull);
final TextStyle redBlueBothPaintMerged = redPaintTextStyle.merge(bluePaintTextStyle);
expect(redBlueBothPaintMerged.color, null);
expect(redBlueBothPaintMerged.foreground, bluePaintTextStyle.foreground);
final TextStyle redPaintBlueColorMerged = redPaintTextStyle.merge(blueTextStyle);
expect(redPaintBlueColorMerged.color, null);
expect(redPaintBlueColorMerged.foreground, redPaintTextStyle.foreground);
final TextStyle blueColorRedPaintMerged = blueTextStyle.merge(redPaintTextStyle);
expect(blueColorRedPaintMerged.color, null);
expect(blueColorRedPaintMerged.foreground, redPaintTextStyle.foreground);
// apply
expect(redPaintTextStyle.apply(color: blue).color, isNull);
expect(redPaintTextStyle.apply(color: blue).foreground!.color, red);
expect(redTextStyle.apply(color: blue).color, blue);
// lerp
expect(TextStyle.lerp(redTextStyle, blueTextStyle, .25)!.color, Color.lerp(red, blue, .25));
expect(TextStyle.lerp(redTextStyle, bluePaintTextStyle, .25)!.color, isNull);
expect(TextStyle.lerp(redTextStyle, bluePaintTextStyle, .25)!.foreground!.color, red);
expect(TextStyle.lerp(redTextStyle, bluePaintTextStyle, .75)!.foreground!.color, blue);
expect(TextStyle.lerp(redPaintTextStyle, bluePaintTextStyle, .25)!.color, isNull);
expect(TextStyle.lerp(redPaintTextStyle, bluePaintTextStyle, .25)!.foreground!.color, red);
expect(TextStyle.lerp(redPaintTextStyle, bluePaintTextStyle, .75)!.foreground!.color, blue);
});
test('backgroundColor', () {
const TextStyle s1 = TextStyle();
expect(s1.backgroundColor, isNull);
expect(s1.toString(), 'TextStyle(<all styles inherited>)');
const TextStyle s2 = TextStyle(backgroundColor: Color(0xFF00FF00));
expect(s2.backgroundColor, const Color(0xFF00FF00));
expect(s2.toString(), 'TextStyle(inherit: true, backgroundColor: Color(0xff00ff00))');
final ui.TextStyle ts2 = s2.getTextStyle();
expect(ts2.toString(), contains('background: Paint(Color(0xff00ff00))'));
});
test('TextStyle background and backgroundColor combos', () {
const Color red = Color.fromARGB(255, 255, 0, 0);
const Color blue = Color.fromARGB(255, 0, 0, 255);
const TextStyle redTextStyle = TextStyle(backgroundColor: red);
const TextStyle blueTextStyle = TextStyle(backgroundColor: blue);
final TextStyle redPaintTextStyle = TextStyle(background: Paint()..color = red);
final TextStyle bluePaintTextStyle = TextStyle(background: Paint()..color = blue);
// merge/copyWith
final TextStyle redBlueBothForegroundMerged = redTextStyle.merge(blueTextStyle);
expect(redBlueBothForegroundMerged.backgroundColor, blue);
expect(redBlueBothForegroundMerged.foreground, isNull);
final TextStyle redBlueBothPaintMerged = redPaintTextStyle.merge(bluePaintTextStyle);
expect(redBlueBothPaintMerged.backgroundColor, null);
expect(redBlueBothPaintMerged.background, bluePaintTextStyle.background);
final TextStyle redPaintBlueColorMerged = redPaintTextStyle.merge(blueTextStyle);
expect(redPaintBlueColorMerged.backgroundColor, null);
expect(redPaintBlueColorMerged.background, redPaintTextStyle.background);
final TextStyle blueColorRedPaintMerged = blueTextStyle.merge(redPaintTextStyle);
expect(blueColorRedPaintMerged.backgroundColor, null);
expect(blueColorRedPaintMerged.background, redPaintTextStyle.background);
// apply
expect(redPaintTextStyle.apply(backgroundColor: blue).backgroundColor, isNull);
expect(redPaintTextStyle.apply(backgroundColor: blue).background!.color, red);
expect(redTextStyle.apply(backgroundColor: blue).backgroundColor, blue);
// lerp
expect(TextStyle.lerp(redTextStyle, blueTextStyle, .25)!.backgroundColor, Color.lerp(red, blue, .25));
expect(TextStyle.lerp(redTextStyle, bluePaintTextStyle, .25)!.backgroundColor, isNull);
expect(TextStyle.lerp(redTextStyle, bluePaintTextStyle, .25)!.background!.color, red);
expect(TextStyle.lerp(redTextStyle, bluePaintTextStyle, .75)!.background!.color, blue);
expect(TextStyle.lerp(redPaintTextStyle, bluePaintTextStyle, .25)!.backgroundColor, isNull);
expect(TextStyle.lerp(redPaintTextStyle, bluePaintTextStyle, .25)!.background!.color, red);
expect(TextStyle.lerp(redPaintTextStyle, bluePaintTextStyle, .75)!.background!.color, blue);
});
test('TextStyle strut textScaleFactor', () {
const TextStyle style0 = TextStyle(fontSize: 10);
final ui.ParagraphStyle paragraphStyle0 = style0.getParagraphStyle(textScaleFactor: 2.5);
const TextStyle style1 = TextStyle(fontSize: 25);
final ui.ParagraphStyle paragraphStyle1 = style1.getParagraphStyle();
expect(paragraphStyle0 == paragraphStyle1, true);
});
test('TextStyle apply', () {
const TextStyle style = TextStyle(
fontSize: 10,
shadows: <ui.Shadow>[],
fontStyle: FontStyle.normal,
fontFeatures: <ui.FontFeature>[],
fontVariations: <ui.FontVariation>[],
textBaseline: TextBaseline.alphabetic,
leadingDistribution: TextLeadingDistribution.even,
);
expect(style.apply().shadows, const <ui.Shadow>[]);
expect(style.apply(shadows: const <ui.Shadow>[ui.Shadow(blurRadius: 2.0)]).shadows, const <ui.Shadow>[ui.Shadow(blurRadius: 2.0)]);
expect(style.apply().fontStyle, FontStyle.normal);
expect(style.apply(fontStyle: FontStyle.italic).fontStyle, FontStyle.italic);
expect(style.apply().locale, isNull);
expect(style.apply(locale: const Locale.fromSubtags(languageCode: 'es')).locale, const Locale.fromSubtags(languageCode: 'es'));
expect(style.apply().fontFeatures, const <ui.FontFeature>[]);
expect(style.apply(fontFeatures: const <ui.FontFeature>[ui.FontFeature.enable('test')]).fontFeatures, const <ui.FontFeature>[ui.FontFeature.enable('test')]);
expect(style.apply().fontVariations, const <ui.FontVariation>[]);
expect(style.apply(fontVariations: const <ui.FontVariation>[ui.FontVariation('test', 100.0)]).fontVariations, const <ui.FontVariation>[ui.FontVariation('test', 100.0)]);
expect(style.apply().textBaseline, TextBaseline.alphabetic);
expect(style.apply(textBaseline: TextBaseline.ideographic).textBaseline, TextBaseline.ideographic);
expect(style.apply().leadingDistribution, TextLeadingDistribution.even);
expect(
style.apply(leadingDistribution: TextLeadingDistribution.proportional).leadingDistribution,
TextLeadingDistribution.proportional,
);
});
test('TextStyle fontFamily and package', () {
expect(const TextStyle(fontFamily: 'fontFamily', package: 'foo') != const TextStyle(fontFamily: 'fontFamily', package: 'bar'), true);
expect(const TextStyle(fontFamily: 'fontFamily', package: 'foo').hashCode != const TextStyle(package: 'bar', fontFamily: 'fontFamily').hashCode, true);
expect(const TextStyle(fontFamily: 'fontFamily').fontFamily, 'fontFamily');
expect(const TextStyle(fontFamily: 'fontFamily').fontFamily, 'fontFamily');
expect(const TextStyle(fontFamily: 'fontFamily').copyWith(package: 'bar').fontFamily, 'packages/bar/fontFamily');
expect(const TextStyle(fontFamily: 'fontFamily', package: 'foo').fontFamily, 'packages/foo/fontFamily');
expect(const TextStyle(fontFamily: 'fontFamily', package: 'foo').copyWith(package: 'bar').fontFamily, 'packages/bar/fontFamily');
expect(const TextStyle().merge(const TextStyle(fontFamily: 'fontFamily', package: 'bar')).fontFamily, 'packages/bar/fontFamily');
expect(const TextStyle().apply(fontFamily: 'fontFamily', package: 'foo').fontFamily, 'packages/foo/fontFamily');
expect(const TextStyle(fontFamily: 'fontFamily', package: 'foo').apply(fontFamily: 'fontFamily', package: 'bar').fontFamily, 'packages/bar/fontFamily');
});
test('TextStyle.lerp identical a,b', () {
expect(TextStyle.lerp(null, null, 0), null);
const TextStyle style = TextStyle();
expect(identical(TextStyle.lerp(style, style, 0.5), style), true);
});
test('Throws when lerping between inherit:true and inherit:false with unspecified fields', () {
const TextStyle fromStyle = TextStyle();
const TextStyle toStyle = TextStyle(inherit: false);
expect(
() => TextStyle.lerp(fromStyle, toStyle, 0.5),
throwsFlutterError,
);
expect(TextStyle.lerp(fromStyle, fromStyle, 0.5), fromStyle);
});
test('Does not throw when lerping between inherit:true and inherit:false but fully specified styles', () {
const TextStyle fromStyle = TextStyle();
const TextStyle toStyle = TextStyle(
inherit: false,
color: Color(0x87654321),
backgroundColor: Color(0x12345678),
fontSize: 20,
letterSpacing: 1,
wordSpacing: 1,
height: 20,
decorationColor: Color(0x11111111),
decorationThickness: 5,
);
expect(TextStyle.lerp(fromStyle, toStyle, 1), toStyle);
});
}