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Add:创建 flutter go web 版

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ryan
2019-08-13 20:38:46 +08:00
parent 64513b59c1
commit da67ccf5a8
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packages/flutter_web/test/engine/paragraph_test.dart Normal file
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// Copyright 2018 The Chromium 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_web_ui/ui.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
void main() {
// Ahem font uses a constant ideographic/alphabetic baseline ratio.
const double kAhemBaselineRatio = 1.25;
test('predictably lays out a single-line paragraph', () {
for (double fontSize in <double>[10.0, 20.0, 30.0, 40.0]) {
final ParagraphBuilder builder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'Ahem',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: fontSize,
));
builder.addText('Test');
final Paragraph paragraph = builder.build();
paragraph.layout(ParagraphConstraints(width: 400.0));
expect(paragraph.height, closeTo(fontSize, 0.001));
expect(paragraph.width, closeTo(400.0, 0.001));
expect(paragraph.minIntrinsicWidth, closeTo(fontSize * 4.0, 0.001));
expect(paragraph.maxIntrinsicWidth, closeTo(fontSize * 4.0, 0.001));
expect(paragraph.alphabeticBaseline, closeTo(fontSize * .8, 0.001));
expect(
paragraph.ideographicBaseline,
closeTo(paragraph.alphabeticBaseline * kAhemBaselineRatio, 3.0),
);
}
});
test('predictably lays out a multi-line paragraph', () {
for (double fontSize in <double>[10.0, 20.0, 30.0, 40.0]) {
final ParagraphBuilder builder = ParagraphBuilder(ParagraphStyle(
fontFamily: 'Ahem',
fontStyle: FontStyle.normal,
fontWeight: FontWeight.normal,
fontSize: fontSize,
));
builder.addText('Test Ahem');
final Paragraph paragraph = builder.build();
paragraph.layout(ParagraphConstraints(width: fontSize * 5.0));
expect(
paragraph.height, closeTo(fontSize * 2.0, 0.001)); // because it wraps
expect(paragraph.width, closeTo(fontSize * 5.0, 0.001));
expect(paragraph.minIntrinsicWidth, closeTo(fontSize * 4.0, 0.001));
// TODO(yjbanov): see https://github.com/flutter/flutter/issues/21965
expect(paragraph.maxIntrinsicWidth, closeTo(fontSize * 9.0, 0.001));
expect(paragraph.alphabeticBaseline, closeTo(fontSize * .8, 0.001));
expect(
paragraph.ideographicBaseline,
closeTo(paragraph.alphabeticBaseline * kAhemBaselineRatio, 3.0),
);
}
});
}