98 lines
4.9 KiB
Dart
98 lines
4.9 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/rendering.dart';
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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test('list body and paragraph intrinsics', () {
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final paragraph = RenderParagraph(
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const TextSpan(style: TextStyle(height: 1.0), text: 'Hello World'),
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textDirection: TextDirection.ltr,
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);
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final testBlock = RenderListBody(children: <RenderBox>[paragraph]);
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final double textWidth = paragraph.getMaxIntrinsicWidth(double.infinity);
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final double oneLineTextHeight = paragraph.getMinIntrinsicHeight(double.infinity);
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final double constrainedWidth = textWidth * 0.9;
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final double wrappedTextWidth = paragraph.getMinIntrinsicWidth(double.infinity);
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final double twoLinesTextHeight = paragraph.getMinIntrinsicHeight(constrainedWidth);
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final double manyLinesTextHeight = paragraph.getMinIntrinsicHeight(0.0);
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// paragraph
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expect(wrappedTextWidth, greaterThan(0.0));
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expect(wrappedTextWidth, lessThan(textWidth));
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expect(oneLineTextHeight, lessThan(twoLinesTextHeight));
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expect(twoLinesTextHeight, lessThan(oneLineTextHeight * 3.0));
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expect(manyLinesTextHeight, greaterThan(twoLinesTextHeight));
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expect(paragraph.getMaxIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
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expect(paragraph.getMaxIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
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expect(paragraph.getMaxIntrinsicHeight(0.0), equals(manyLinesTextHeight));
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// vertical block (same expectations)
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expect(testBlock.getMinIntrinsicWidth(double.infinity), equals(wrappedTextWidth));
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expect(testBlock.getMaxIntrinsicWidth(double.infinity), equals(textWidth));
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expect(testBlock.getMinIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
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expect(testBlock.getMinIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMinIntrinsicWidth(0.0), equals(wrappedTextWidth));
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expect(testBlock.getMaxIntrinsicWidth(0.0), equals(textWidth));
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expect(testBlock.getMinIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMinIntrinsicHeight(0.0), equals(manyLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(0.0), equals(manyLinesTextHeight));
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// horizontal block (same expectations again)
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testBlock.axisDirection = AxisDirection.right;
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expect(testBlock.getMinIntrinsicWidth(double.infinity), equals(wrappedTextWidth));
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expect(testBlock.getMaxIntrinsicWidth(double.infinity), equals(textWidth));
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expect(testBlock.getMinIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
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expect(testBlock.getMinIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMinIntrinsicWidth(0.0), equals(wrappedTextWidth));
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expect(testBlock.getMaxIntrinsicWidth(0.0), equals(textWidth));
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expect(testBlock.getMinIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
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expect(testBlock.getMinIntrinsicHeight(0.0), equals(manyLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(0.0), equals(manyLinesTextHeight));
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});
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test('textScaler affects intrinsics', () {
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final paragraph = RenderParagraph(
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const TextSpan(style: TextStyle(fontSize: 10), text: 'Hello World'),
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textDirection: TextDirection.ltr,
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);
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expect(paragraph.getMaxIntrinsicWidth(double.infinity), 110);
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paragraph.textScaler = const TextScaler.linear(2);
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expect(paragraph.getMaxIntrinsicWidth(double.infinity), 220);
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});
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test('maxLines affects intrinsics', () {
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final paragraph = RenderParagraph(
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TextSpan(style: const TextStyle(fontSize: 10), text: List<String>.filled(5, 'A').join('\n')),
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textDirection: TextDirection.ltr,
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);
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expect(paragraph.getMaxIntrinsicHeight(double.infinity), 50);
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paragraph.maxLines = 1;
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expect(paragraph.getMaxIntrinsicHeight(double.infinity), 10);
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});
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test('strutStyle affects intrinsics', () {
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final paragraph = RenderParagraph(
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const TextSpan(style: TextStyle(fontSize: 10), text: 'Hello World'),
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textDirection: TextDirection.ltr,
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);
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expect(paragraph.getMaxIntrinsicHeight(double.infinity), 10);
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paragraph.strutStyle = const StrutStyle(fontSize: 100, forceStrutHeight: true);
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expect(paragraph.getMaxIntrinsicHeight(double.infinity), 100);
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});
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}
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