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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 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
test('TextTheme copyWith apply, merge basics with const TextTheme()', () {
expect(const TextTheme(), equals(const TextTheme().copyWith()));
expect(const TextTheme(), equals(const TextTheme().apply()));
expect(const TextTheme(), equals(const TextTheme().merge(null)));
expect(const TextTheme().hashCode, equals(const TextTheme().copyWith().hashCode));
expect(const TextTheme(), equals(const TextTheme().copyWith()));
});
test('TextTheme copyWith apply, merge basics with Typography.black', () {
final Typography typography = Typography.material2018();
expect(typography.black, equals(typography.black.copyWith()));
expect(typography.black, equals(typography.black.apply()));
expect(typography.black, equals(typography.black.merge(null)));
expect(typography.black, equals(const TextTheme().merge(typography.black)));
expect(typography.black, equals(typography.black.merge(typography.black)));
expect(typography.white, equals(typography.black.merge(typography.white)));
expect(typography.black.hashCode, equals(typography.black.copyWith().hashCode));
expect(typography.black, isNot(equals(typography.white)));
});
test('TextTheme copyWith', () {
final Typography typography = Typography.material2018();
final TextTheme whiteCopy = typography.black.copyWith(
displayLarge: typography.white.displayLarge,
displayMedium: typography.white.displayMedium,
displaySmall: typography.white.displaySmall,
headlineLarge: typography.white.headlineLarge,
headlineMedium: typography.white.headlineMedium,
headlineSmall: typography.white.headlineSmall,
titleLarge: typography.white.titleLarge,
titleMedium: typography.white.titleMedium,
titleSmall: typography.white.titleSmall,
bodyLarge: typography.white.bodyLarge,
bodyMedium: typography.white.bodyMedium,
bodySmall: typography.white.bodySmall,
labelLarge: typography.white.labelLarge,
labelMedium: typography.white.labelMedium,
labelSmall: typography.white.labelSmall,
);
expect(typography.white, equals(whiteCopy));
});
test('TextTheme merges properly in the presence of null fields.', () {
const TextTheme partialTheme = TextTheme(headline6: TextStyle(color: Color(0xcafefeed)));
final TextTheme fullTheme = ThemeData.fallback().textTheme.merge(partialTheme);
expect(fullTheme.headline6!.color, equals(partialTheme.headline6!.color));
const TextTheme onlyHeadlineSmallAndTitleLarge = TextTheme(
headlineSmall: TextStyle(color: Color(0xcafefeed)),
titleLarge: TextStyle(color: Color(0xbeefcafe)),
);
const TextTheme onlyBodyMediumAndTitleLarge = TextTheme(
bodyMedium: TextStyle(color: Color(0xfeedfeed)),
titleLarge: TextStyle(color: Color(0xdeadcafe)),
);
TextTheme merged = onlyHeadlineSmallAndTitleLarge.merge(onlyBodyMediumAndTitleLarge);
expect(merged.bodyLarge, isNull);
expect(merged.bodyMedium!.color, equals(onlyBodyMediumAndTitleLarge.bodyMedium!.color));
expect(merged.headlineSmall!.color, equals(onlyHeadlineSmallAndTitleLarge.headlineSmall!.color));
expect(merged.titleLarge!.color, equals(onlyBodyMediumAndTitleLarge.titleLarge!.color));
merged = onlyHeadlineSmallAndTitleLarge.merge(null);
expect(merged, equals(onlyHeadlineSmallAndTitleLarge));
});
test('TextTheme apply', () {
// The `displayColor` is applied to [displayLarge], [displayMedium],
// [displaySmall], [headlineLarge], [headlineMedium], and [bodySmall]. The
// `bodyColor` is applied to the remaining text styles.
const Color displayColor = Color(0x00000001);
const Color bodyColor = Color(0x00000002);
const String fontFamily = 'fontFamily';
const Color decorationColor = Color(0x00000003);
const TextDecorationStyle decorationStyle = TextDecorationStyle.dashed;
final TextDecoration decoration = TextDecoration.combine(<TextDecoration>[
TextDecoration.underline,
TextDecoration.lineThrough,
]);
final Typography typography = Typography.material2018();
final TextTheme theme = typography.black.apply(
fontFamily: fontFamily,
displayColor: displayColor,
bodyColor: bodyColor,
decoration: decoration,
decorationColor: decorationColor,
decorationStyle: decorationStyle,
);
expect(theme.displayLarge!.color, displayColor);
expect(theme.displayMedium!.color, displayColor);
expect(theme.displaySmall!.color, displayColor);
expect(theme.headlineLarge!.color, displayColor);
expect(theme.headlineMedium!.color, displayColor);
expect(theme.headlineSmall!.color, bodyColor);
expect(theme.titleLarge!.color, bodyColor);
expect(theme.titleMedium!.color, bodyColor);
expect(theme.titleSmall!.color, bodyColor);
expect(theme.bodyLarge!.color, bodyColor);
expect(theme.bodyMedium!.color, bodyColor);
expect(theme.bodySmall!.color, displayColor);
expect(theme.labelLarge!.color, bodyColor);
expect(theme.labelMedium!.color, bodyColor);
expect(theme.labelSmall!.color, bodyColor);
final List<TextStyle> themeStyles = <TextStyle>[
theme.displayLarge!,
theme.displayMedium!,
theme.displaySmall!,
theme.headlineLarge!,
theme.headlineMedium!,
theme.headlineSmall!,
theme.titleLarge!,
theme.titleMedium!,
theme.titleSmall!,
theme.bodyLarge!,
theme.bodyMedium!,
theme.bodySmall!,
theme.labelLarge!,
theme.labelMedium!,
theme.labelSmall!,
];
expect(themeStyles.every((TextStyle style) => style.fontFamily == fontFamily), true);
expect(themeStyles.every((TextStyle style) => style.decorationColor == decorationColor), true);
expect(themeStyles.every((TextStyle style) => style.decorationStyle == decorationStyle), true);
expect(themeStyles.every((TextStyle style) => style.decoration == decoration), true);
});
test('TextTheme apply fontSizeFactor fontSizeDelta', () {
final Typography typography = Typography.material2018();
final TextTheme baseTheme = Typography.englishLike2018.merge(typography.black);
final TextTheme sizeTheme = baseTheme.apply(
fontSizeFactor: 2.0,
fontSizeDelta: 5.0,
);
expect(sizeTheme.displayLarge!.fontSize, baseTheme.displayLarge!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.displayMedium!.fontSize, baseTheme.displayMedium!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.displaySmall!.fontSize, baseTheme.displaySmall!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.headlineLarge!.fontSize, baseTheme.headlineLarge!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.headlineMedium!.fontSize, baseTheme.headlineMedium!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.headlineSmall!.fontSize, baseTheme.headlineSmall!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.titleLarge!.fontSize, baseTheme.titleLarge!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.titleMedium!.fontSize, baseTheme.titleMedium!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.titleSmall!.fontSize, baseTheme.titleSmall!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.bodyLarge!.fontSize, baseTheme.bodyLarge!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.bodyMedium!.fontSize, baseTheme.bodyMedium!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.bodySmall!.fontSize, baseTheme.bodySmall!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.labelLarge!.fontSize, baseTheme.labelLarge!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.labelMedium!.fontSize, baseTheme.labelMedium!.fontSize! * 2.0 + 5.0);
expect(sizeTheme.labelSmall!.fontSize, baseTheme.labelSmall!.fontSize! * 2.0 + 5.0);
});
test('TextTheme lerp with second parameter null', () {
final TextTheme theme = Typography.material2018().black;
final TextTheme lerped = TextTheme.lerp(theme, null, 0.25);
expect(lerped.displayLarge, TextStyle.lerp(theme.displayLarge, null, 0.25));
expect(lerped.displayMedium, TextStyle.lerp(theme.displayMedium, null, 0.25));
expect(lerped.displaySmall, TextStyle.lerp(theme.displaySmall, null, 0.25));
expect(lerped.headlineLarge, TextStyle.lerp(theme.headlineLarge, null, 0.25));
expect(lerped.headlineMedium, TextStyle.lerp(theme.headlineMedium, null, 0.25));
expect(lerped.headlineSmall, TextStyle.lerp(theme.headlineSmall, null, 0.25));
expect(lerped.titleLarge, TextStyle.lerp(theme.titleLarge, null, 0.25));
expect(lerped.titleMedium, TextStyle.lerp(theme.titleMedium, null, 0.25));
expect(lerped.titleSmall, TextStyle.lerp(theme.titleSmall, null, 0.25));
expect(lerped.bodyLarge, TextStyle.lerp(theme.bodyLarge, null, 0.25));
expect(lerped.bodyMedium, TextStyle.lerp(theme.bodyMedium, null, 0.25));
expect(lerped.bodySmall, TextStyle.lerp(theme.bodySmall, null, 0.25));
expect(lerped.labelLarge, TextStyle.lerp(theme.labelLarge, null, 0.25));
expect(lerped.labelMedium, TextStyle.lerp(theme.labelMedium, null, 0.25));
expect(lerped.labelSmall, TextStyle.lerp(theme.labelSmall, null, 0.25));
});
test('TextTheme lerp with first parameter null', () {
final TextTheme theme = Typography.material2018().black;
final TextTheme lerped = TextTheme.lerp(null, theme, 0.25);
expect(lerped.displayLarge, TextStyle.lerp(null, theme.displayLarge, 0.25));
expect(lerped.displayMedium, TextStyle.lerp(null, theme.displayMedium, 0.25));
expect(lerped.displaySmall, TextStyle.lerp(null, theme.displaySmall, 0.25));
expect(lerped.headlineLarge, TextStyle.lerp(null, theme.headlineLarge, 0.25));
expect(lerped.headlineMedium, TextStyle.lerp(null, theme.headlineMedium, 0.25));
expect(lerped.headlineSmall, TextStyle.lerp(null, theme.headlineSmall, 0.25));
expect(lerped.titleLarge, TextStyle.lerp(null, theme.titleLarge, 0.25));
expect(lerped.titleMedium, TextStyle.lerp(null, theme.titleMedium, 0.25));
expect(lerped.titleSmall, TextStyle.lerp(null, theme.titleSmall, 0.25));
expect(lerped.bodyLarge, TextStyle.lerp(null, theme.bodyLarge, 0.25));
expect(lerped.bodyMedium, TextStyle.lerp(null, theme.bodyMedium, 0.25));
expect(lerped.bodySmall, TextStyle.lerp(null, theme.bodySmall, 0.25));
expect(lerped.labelLarge, TextStyle.lerp(null, theme.labelLarge, 0.25));
expect(lerped.labelMedium, TextStyle.lerp(null, theme.labelMedium, 0.25));
expect(lerped.labelSmall, TextStyle.lerp(null, theme.labelSmall, 0.25));
});
test('TextTheme lerp with null parameters', () {
final TextTheme lerped = TextTheme.lerp(null, null, 0.25);
expect(lerped.displayLarge, null);
expect(lerped.displayMedium, null);
expect(lerped.displaySmall, null);
expect(lerped.headlineLarge, null);
expect(lerped.headlineMedium, null);
expect(lerped.headlineSmall, null);
expect(lerped.titleLarge, null);
expect(lerped.titleMedium, null);
expect(lerped.titleSmall, null);
expect(lerped.bodyLarge, null);
expect(lerped.bodyMedium, null);
expect(lerped.bodySmall, null);
expect(lerped.labelLarge, null);
expect(lerped.labelMedium, null);
expect(lerped.labelSmall, null);
});
test('VisualDensity.lerp', () {
const VisualDensity a = VisualDensity(horizontal: 1.0, vertical: .5);
const VisualDensity b = VisualDensity(horizontal: 2.0, vertical: 1.0);
final VisualDensity noLerp = VisualDensity.lerp(a, b, 0.0);
expect(noLerp.horizontal, 1.0);
expect(noLerp.vertical, .5);
final VisualDensity quarterLerp = VisualDensity.lerp(a, b, .25);
expect(quarterLerp.horizontal, 1.25);
expect(quarterLerp.vertical, .625);
final VisualDensity fullLerp = VisualDensity.lerp(a, b, 1.0);
expect(fullLerp.horizontal, 2.0);
expect(fullLerp.vertical, 1.0);
});
}