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// Copyright 2013 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.
// This is testing some of the named constants.
// ignore_for_file: use_named_constants
import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
import 'dart:ui';
import 'package:litetest/litetest.dart';
import 'package:path/path.dart' as path;
Future<Uint8List> readFile(String fileName) async {
final File file = File(path.join('flutter', 'testing', 'resources', fileName));
return file.readAsBytes();
}
void testFontWeight() {
test('FontWeight.lerp works with non-null values', () {
expect(FontWeight.lerp(FontWeight.w400, FontWeight.w600, .5), equals(FontWeight.w500));
});
test('FontWeight.lerp returns null if a and b are null', () {
expect(FontWeight.lerp(null, null, 0), isNull);
});
test('FontWeight.lerp returns FontWeight.w400 if a is null', () {
expect(FontWeight.lerp(null, FontWeight.w400, 0), equals(FontWeight.w400));
});
test('FontWeight.lerp returns FontWeight.w400 if b is null', () {
expect(FontWeight.lerp(FontWeight.w400, null, 1), equals(FontWeight.w400));
});
test('FontWeights have the correct value', () {
expect(FontWeight.w100.value, 100);
expect(FontWeight.w200.value, 200);
expect(FontWeight.w300.value, 300);
expect(FontWeight.w400.value, 400);
expect(FontWeight.w500.value, 500);
expect(FontWeight.w600.value, 600);
expect(FontWeight.w700.value, 700);
expect(FontWeight.w800.value, 800);
expect(FontWeight.w900.value, 900);
});
}
void testParagraphStyle() {
final ParagraphStyle ps0 = ParagraphStyle(textDirection: TextDirection.ltr, fontSize: 14.0);
final ParagraphStyle ps1 = ParagraphStyle(textDirection: TextDirection.rtl, fontSize: 14.0);
final ParagraphStyle ps2 = ParagraphStyle(textAlign: TextAlign.center, fontWeight: FontWeight.w800, fontSize: 10.0, height: 100.0);
final ParagraphStyle ps3 = ParagraphStyle(fontWeight: FontWeight.w700, fontSize: 12.0, height: 123.0);
test('ParagraphStyle toString works', () {
expect(ps0.toString(), equals('ParagraphStyle(textAlign: unspecified, textDirection: TextDirection.ltr, fontWeight: unspecified, fontStyle: unspecified, maxLines: unspecified, textHeightBehavior: unspecified, fontFamily: unspecified, fontSize: 14.0, height: unspecified, strutStyle: unspecified, ellipsis: unspecified, locale: unspecified)'));
expect(ps1.toString(), equals('ParagraphStyle(textAlign: unspecified, textDirection: TextDirection.rtl, fontWeight: unspecified, fontStyle: unspecified, maxLines: unspecified, textHeightBehavior: unspecified, fontFamily: unspecified, fontSize: 14.0, height: unspecified, strutStyle: unspecified, ellipsis: unspecified, locale: unspecified)'));
expect(ps2.toString(), equals('ParagraphStyle(textAlign: TextAlign.center, textDirection: unspecified, fontWeight: FontWeight.w800, fontStyle: unspecified, maxLines: unspecified, textHeightBehavior: unspecified, fontFamily: unspecified, fontSize: 10.0, height: 100.0x, strutStyle: unspecified, ellipsis: unspecified, locale: unspecified)'));
expect(ps3.toString(), equals('ParagraphStyle(textAlign: unspecified, textDirection: unspecified, fontWeight: FontWeight.w700, fontStyle: unspecified, maxLines: unspecified, textHeightBehavior: unspecified, fontFamily: unspecified, fontSize: 12.0, height: 123.0x, strutStyle: unspecified, ellipsis: unspecified, locale: unspecified)'));
});
}
void testTextStyle() {
final TextStyle ts0 = TextStyle(fontWeight: FontWeight.w700, fontSize: 12.0, height: 123.0);
final TextStyle ts1 = TextStyle(color: const Color(0xFF00FF00), fontWeight: FontWeight.w800, fontSize: 10.0, height: 100.0);
final TextStyle ts2 = TextStyle(fontFamily: 'test');
final TextStyle ts3 = TextStyle(fontFamily: 'foo', fontFamilyFallback: <String>['Roboto', 'test']);
final TextStyle ts4 = TextStyle(leadingDistribution: TextLeadingDistribution.even);
test('TextStyle toString works', () {
expect(
ts0.toString(),
equals('TextStyle(color: unspecified, decoration: unspecified, decorationColor: unspecified, decorationStyle: unspecified, decorationThickness: unspecified, fontWeight: FontWeight.w700, fontStyle: unspecified, textBaseline: unspecified, fontFamily: unspecified, fontFamilyFallback: unspecified, fontSize: 12.0, letterSpacing: unspecified, wordSpacing: unspecified, height: 123.0x, leadingDistribution: unspecified, locale: unspecified, background: unspecified, foreground: unspecified, shadows: unspecified, fontFeatures: unspecified, fontVariations: unspecified)'),
);
expect(
ts1.toString(),
equals('TextStyle(color: Color(0xff00ff00), decoration: unspecified, decorationColor: unspecified, decorationStyle: unspecified, decorationThickness: unspecified, fontWeight: FontWeight.w800, fontStyle: unspecified, textBaseline: unspecified, fontFamily: unspecified, fontFamilyFallback: unspecified, fontSize: 10.0, letterSpacing: unspecified, wordSpacing: unspecified, height: 100.0x, leadingDistribution: unspecified, locale: unspecified, background: unspecified, foreground: unspecified, shadows: unspecified, fontFeatures: unspecified, fontVariations: unspecified)'),
);
expect(
ts2.toString(),
equals('TextStyle(color: unspecified, decoration: unspecified, decorationColor: unspecified, decorationStyle: unspecified, decorationThickness: unspecified, fontWeight: unspecified, fontStyle: unspecified, textBaseline: unspecified, fontFamily: test, fontFamilyFallback: unspecified, fontSize: unspecified, letterSpacing: unspecified, wordSpacing: unspecified, height: unspecified, leadingDistribution: unspecified, locale: unspecified, background: unspecified, foreground: unspecified, shadows: unspecified, fontFeatures: unspecified, fontVariations: unspecified)'),
);
expect(
ts3.toString(),
equals('TextStyle(color: unspecified, decoration: unspecified, decorationColor: unspecified, decorationStyle: unspecified, decorationThickness: unspecified, fontWeight: unspecified, fontStyle: unspecified, textBaseline: unspecified, fontFamily: foo, fontFamilyFallback: [Roboto, test], fontSize: unspecified, letterSpacing: unspecified, wordSpacing: unspecified, height: unspecified, leadingDistribution: unspecified, locale: unspecified, background: unspecified, foreground: unspecified, shadows: unspecified, fontFeatures: unspecified, fontVariations: unspecified)'),
);
expect(
ts4.toString(),
equals('TextStyle(color: unspecified, decoration: unspecified, decorationColor: unspecified, decorationStyle: unspecified, decorationThickness: unspecified, fontWeight: unspecified, fontStyle: unspecified, textBaseline: unspecified, fontFamily: unspecified, fontFamilyFallback: unspecified, fontSize: unspecified, letterSpacing: unspecified, wordSpacing: unspecified, height: unspecified, leadingDistribution: TextLeadingDistribution.even, locale: unspecified, background: unspecified, foreground: unspecified, shadows: unspecified, fontFeatures: unspecified, fontVariations: unspecified)'),
);
});
}
void testTextHeightBehavior() {
const TextHeightBehavior behavior0 = TextHeightBehavior();
const TextHeightBehavior behavior1 = TextHeightBehavior(
applyHeightToFirstAscent: false,
applyHeightToLastDescent: false
);
const TextHeightBehavior behavior2 = TextHeightBehavior(
applyHeightToFirstAscent: false,
);
const TextHeightBehavior behavior3 = TextHeightBehavior(
applyHeightToLastDescent: false
);
const TextHeightBehavior behavior4 = TextHeightBehavior(
applyHeightToLastDescent: false,
leadingDistribution: TextLeadingDistribution.even,
);
test('TextHeightBehavior default constructor works', () {
expect(behavior0.applyHeightToFirstAscent, equals(true));
expect(behavior0.applyHeightToLastDescent, equals(true));
expect(behavior1.applyHeightToFirstAscent, equals(false));
expect(behavior1.applyHeightToLastDescent, equals(false));
expect(behavior2.applyHeightToFirstAscent, equals(false));
expect(behavior2.applyHeightToLastDescent, equals(true));
expect(behavior3.applyHeightToFirstAscent, equals(true));
expect(behavior3.applyHeightToLastDescent, equals(false));
expect(behavior4.applyHeightToLastDescent, equals(false));
expect(behavior4.leadingDistribution, equals(TextLeadingDistribution.even));
});
test('TextHeightBehavior toString works', () {
expect(behavior0.toString(), equals('TextHeightBehavior(applyHeightToFirstAscent: true, applyHeightToLastDescent: true, leadingDistribution: TextLeadingDistribution.proportional)'));
expect(behavior1.toString(), equals('TextHeightBehavior(applyHeightToFirstAscent: false, applyHeightToLastDescent: false, leadingDistribution: TextLeadingDistribution.proportional)'));
expect(behavior2.toString(), equals('TextHeightBehavior(applyHeightToFirstAscent: false, applyHeightToLastDescent: true, leadingDistribution: TextLeadingDistribution.proportional)'));
expect(behavior3.toString(), equals('TextHeightBehavior(applyHeightToFirstAscent: true, applyHeightToLastDescent: false, leadingDistribution: TextLeadingDistribution.proportional)'));
expect(behavior4.toString(), equals('TextHeightBehavior(applyHeightToFirstAscent: true, applyHeightToLastDescent: false, leadingDistribution: TextLeadingDistribution.even)'));
});
}
void testTextRange() {
test('TextRange empty ranges are correct', () {
const TextRange range = TextRange(start: -1, end: -1);
expect(range, equals(const TextRange.collapsed(-1)));
expect(range, equals(TextRange.empty));
});
test('TextRange isValid works', () {
expect(TextRange.empty.isValid, isFalse);
expect(const TextRange(start: 0, end: 0).isValid, isTrue);
expect(const TextRange(start: 0, end: 10).isValid, isTrue);
expect(const TextRange(start: 10, end: 10).isValid, isTrue);
expect(const TextRange(start: -1, end: 10).isValid, isFalse);
expect(const TextRange(start: 10, end: 0).isValid, isTrue);
expect(const TextRange(start: 10, end: -1).isValid, isFalse);
});
test('TextRange isCollapsed works', () {
expect(TextRange.empty.isCollapsed, isTrue);
expect(const TextRange(start: 0, end: 0).isCollapsed, isTrue);
expect(const TextRange(start: 0, end: 10).isCollapsed, isFalse);
expect(const TextRange(start: 10, end: 10).isCollapsed, isTrue);
expect(const TextRange(start: -1, end: 10).isCollapsed, isFalse);
expect(const TextRange(start: 10, end: 0).isCollapsed, isFalse);
expect(const TextRange(start: 10, end: -1).isCollapsed, isFalse);
});
test('TextRange isNormalized works', () {
expect(TextRange.empty.isNormalized, isTrue);
expect(const TextRange(start: 0, end: 0).isNormalized, isTrue);
expect(const TextRange(start: 0, end: 10).isNormalized, isTrue);
expect(const TextRange(start: 10, end: 10).isNormalized, isTrue);
expect(const TextRange(start: -1, end: 10).isNormalized, isTrue);
expect(const TextRange(start: 10, end: 0).isNormalized, isFalse);
expect(const TextRange(start: 10, end: -1).isNormalized, isFalse);
});
test('TextRange textBefore works', () {
expect(const TextRange(start: 0, end: 0).textBefore('hello'), isEmpty);
expect(const TextRange(start: 1, end: 1).textBefore('hello'), equals('h'));
expect(const TextRange(start: 1, end: 2).textBefore('hello'), equals('h'));
expect(const TextRange(start: 5, end: 5).textBefore('hello'), equals('hello'));
expect(const TextRange(start: 0, end: 5).textBefore('hello'), isEmpty);
});
test('TextRange textAfter works', () {
expect(const TextRange(start: 0, end: 0).textAfter('hello'), equals('hello'));
expect(const TextRange(start: 1, end: 1).textAfter('hello'), equals('ello'));
expect(const TextRange(start: 1, end: 2).textAfter('hello'), equals('llo'));
expect(const TextRange(start: 5, end: 5).textAfter('hello'), isEmpty);
expect(const TextRange(start: 0, end: 5).textAfter('hello'), isEmpty);
});
test('TextRange textInside works', () {
expect(const TextRange(start: 0, end: 0).textInside('hello'), isEmpty);
expect(const TextRange(start: 1, end: 1).textInside('hello'), isEmpty);
expect(const TextRange(start: 1, end: 2).textInside('hello'), equals('e'));
expect(const TextRange(start: 5, end: 5).textInside('hello'), isEmpty);
expect(const TextRange(start: 0, end: 5).textInside('hello'), equals('hello'));
});
}
void testGlyphInfo() {
test('constructor', () {
const Rect testRect = Rect.fromLTWH(1, 2, 3, 4);
const TextRange testRange = TextRange(start: 5, end: 6);
const TextDirection testDirection = TextDirection.ltr;
final GlyphInfo info = GlyphInfo(testRect, testRange, testDirection);
expect(info.graphemeClusterLayoutBounds, testRect);
expect(info.graphemeClusterCodeUnitRange, testRange);
expect(info.writingDirection, testDirection);
});
}
void testLoadFontFromList() {
test('loadFontFromList will send platform message after font is loaded', () async {
late String message;
channelBuffers.setListener(
'flutter/system',
(ByteData? data, PlatformMessageResponseCallback? callback) {
assert(data != null);
final Uint8List list = data!.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
message = utf8.decode(list);
},
);
final Uint8List fontData = Uint8List(0);
await loadFontFromList(fontData, fontFamily: 'fake');
expect(message, '{"type":"fontsChange"}');
channelBuffers.clearListener('flutter/system');
});
}
void testFontFeatureClass() {
test('FontFeature class', () {
expect(const FontFeature.alternative(1), const FontFeature('aalt'));
expect(const FontFeature.alternative(5), const FontFeature('aalt', 5));
expect(const FontFeature.alternativeFractions(), const FontFeature('afrc'));
expect(const FontFeature.contextualAlternates(), const FontFeature('calt'));
expect(const FontFeature.caseSensitiveForms(), const FontFeature('case'));
expect( FontFeature.characterVariant(1), const FontFeature('cv01'));
expect( FontFeature.characterVariant(18), const FontFeature('cv18'));
expect( FontFeature.characterVariant(99), const FontFeature('cv99'));
expect(const FontFeature.denominator(), const FontFeature('dnom'));
expect(const FontFeature.fractions(), const FontFeature('frac'));
expect(const FontFeature.historicalForms(), const FontFeature('hist'));
expect(const FontFeature.historicalLigatures(), const FontFeature('hlig'));
expect(const FontFeature.liningFigures(), const FontFeature('lnum'));
expect(const FontFeature.localeAware(), const FontFeature('locl'));
expect(const FontFeature.localeAware(), const FontFeature('locl'));
expect(const FontFeature.localeAware(enable: false), const FontFeature('locl', 0));
expect(const FontFeature.notationalForms(), const FontFeature('nalt'));
expect(const FontFeature.notationalForms(5), const FontFeature('nalt', 5));
expect(const FontFeature.numerators(), const FontFeature('numr'));
expect(const FontFeature.oldstyleFigures(), const FontFeature('onum'));
expect(const FontFeature.ordinalForms(), const FontFeature('ordn'));
expect(const FontFeature.proportionalFigures(), const FontFeature('pnum'));
expect(const FontFeature.randomize(), const FontFeature('rand'));
expect(const FontFeature.stylisticAlternates(), const FontFeature('salt'));
expect(const FontFeature.scientificInferiors(), const FontFeature('sinf'));
expect( FontFeature.stylisticSet(1), const FontFeature('ss01'));
expect( FontFeature.stylisticSet(18), const FontFeature('ss18'));
expect(const FontFeature.subscripts(), const FontFeature('subs'));
expect(const FontFeature.superscripts(), const FontFeature('sups'));
expect(const FontFeature.swash(), const FontFeature('swsh'));
expect(const FontFeature.swash(0), const FontFeature('swsh', 0));
expect(const FontFeature.swash(5), const FontFeature('swsh', 5));
expect(const FontFeature.tabularFigures(), const FontFeature('tnum'));
expect(const FontFeature.slashedZero(), const FontFeature('zero'));
expect(const FontFeature.enable('TEST'), const FontFeature('TEST'));
expect(const FontFeature.disable('TEST'), const FontFeature('TEST', 0));
expect(const FontFeature('FEAT', 1000).feature, 'FEAT');
expect(const FontFeature('FEAT', 1000).value, 1000);
expect(const FontFeature('FEAT', 1000).toString(), "FontFeature('FEAT', 1000)");
});
}
void testFontVariation() {
test('FontVariation', () async {
final Uint8List fontData = await readFile('RobotoSlab-VariableFont_wght.ttf');
await loadFontFromList(fontData, fontFamily: 'RobotoSerif');
final ParagraphBuilder baseBuilder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'RobotoSerif',
fontSize: 40.0,
));
baseBuilder.addText('Hello');
final Paragraph baseParagraph = baseBuilder.build();
baseParagraph.layout(const ParagraphConstraints(width: double.infinity));
final double baseWidth = baseParagraph.minIntrinsicWidth;
final ParagraphBuilder wideBuilder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'RobotoSerif',
fontSize: 40.0,
));
wideBuilder.pushStyle(TextStyle(
fontFamily: 'RobotoSerif',
fontSize: 40.0,
fontVariations: <FontVariation>[const FontVariation('wght', 900.0)],
));
wideBuilder.addText('Hello');
final Paragraph wideParagraph = wideBuilder.build();
wideParagraph.layout(const ParagraphConstraints(width: double.infinity));
final double wideWidth = wideParagraph.minIntrinsicWidth;
expect(wideWidth, greaterThan(baseWidth));
});
test('FontVariation constructors', () async {
expect(const FontVariation.weight(123.0).axis, 'wght');
expect(const FontVariation.weight(123.0).value, 123.0);
expect(const FontVariation.width(123.0).axis, 'wdth');
expect(const FontVariation.width(123.0).value, 123.0);
expect(const FontVariation.slant(45.0).axis, 'slnt');
expect(const FontVariation.slant(45.0).value, 45.0);
expect(const FontVariation.opticalSize(67.0).axis, 'opsz');
expect(const FontVariation.opticalSize(67.0).value, 67.0);
expect(const FontVariation.italic(0.8).axis, 'ital');
expect(const FontVariation.italic(0.8).value, 0.8);
});
test('FontVariation.lerp', () async {
expect(FontVariation.lerp(const FontVariation.weight(100.0), const FontVariation.weight(300.0), 0.5), const FontVariation.weight(200.0));
expect(FontVariation.lerp(const FontVariation.slant(0.0), const FontVariation.slant(-80.0), 0.25), const FontVariation.slant(-20.0));
expect(FontVariation.lerp(const FontVariation.width(90.0), const FontVariation.italic(0.2), 0.1), const FontVariation.width(90.0));
expect(FontVariation.lerp(const FontVariation.width(90.0), const FontVariation.italic(0.2), 0.9), const FontVariation.italic(0.2));
});
}
void testGetWordBoundary() {
test('GetWordBoundary', () async {
final Uint8List fontData = await readFile('RobotoSlab-VariableFont_wght.ttf');
await loadFontFromList(fontData, fontFamily: 'RobotoSerif');
final ParagraphBuilder builder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'RobotoSerif',
fontSize: 40.0,
));
builder.addText('Hello team');
final Paragraph paragraph = builder.build();
paragraph.layout(const ParagraphConstraints(width: double.infinity));
TextRange range = paragraph.getWordBoundary(const TextPosition(offset: 5, affinity: TextAffinity.upstream));
expect(range.start, 0);
expect(range.end, 5);
range = paragraph.getWordBoundary(const TextPosition(offset: 5));
expect(range.start, 5);
expect(range.end, 6);
});
}
void main() {
testFontWeight();
testParagraphStyle();
testTextStyle();
testTextHeightBehavior();
testTextRange();
testGlyphInfo();
testLoadFontFromList();
testFontFeatureClass();
testFontVariation();
testGetWordBoundary();
}