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1e207c0150
Previously this was used by MixedViewport, but now we don't need it because LazyBlockViewport has replaced MixedViewport. I've also taken this opportunity to modernize RenderBlock.
54 lines
2.5 KiB
Dart
54 lines
2.5 KiB
Dart
// Copyright 2015 The Chromium 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:test/test.dart';
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void main() {
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test('block intrinsics', () {
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RenderParagraph paragraph = new RenderParagraph(
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new TextSpan(
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style: new TextStyle(height: 1.0),
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text: 'Hello World'
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)
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);
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const BoxConstraints unconstrained = const BoxConstraints();
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double textWidth = paragraph.getMaxIntrinsicWidth(unconstrained);
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double oneLineTextHeight = paragraph.getMinIntrinsicHeight(unconstrained);
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final BoxConstraints constrained = new BoxConstraints(maxWidth: textWidth * 0.9);
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double wrappedTextWidth = paragraph.getMinIntrinsicWidth(unconstrained);
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double twoLinesTextHeight = paragraph.getMinIntrinsicHeight(constrained);
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// controls
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expect(wrappedTextWidth, lessThan(textWidth));
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expect(paragraph.getMinIntrinsicWidth(unconstrained), equals(wrappedTextWidth));
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expect(paragraph.getMaxIntrinsicWidth(constrained), equals(constrained.maxWidth));
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expect(oneLineTextHeight, lessThan(twoLinesTextHeight));
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expect(twoLinesTextHeight, lessThan(oneLineTextHeight * 3.0));
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expect(paragraph.getMaxIntrinsicHeight(unconstrained), equals(oneLineTextHeight));
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expect(paragraph.getMaxIntrinsicHeight(constrained), equals(twoLinesTextHeight));
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RenderBox testBlock = new RenderBlock(
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children: <RenderBox>[
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paragraph,
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]
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);
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expect(testBlock.getMinIntrinsicWidth(unconstrained), equals(wrappedTextWidth));
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expect(testBlock.getMinIntrinsicWidth(constrained), equals(wrappedTextWidth));
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expect(testBlock.getMaxIntrinsicWidth(unconstrained), equals(textWidth));
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expect(testBlock.getMaxIntrinsicWidth(constrained), equals(constrained.maxWidth));
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expect(testBlock.getMinIntrinsicHeight(unconstrained), equals(oneLineTextHeight));
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expect(testBlock.getMinIntrinsicHeight(constrained), equals(twoLinesTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(unconstrained), equals(oneLineTextHeight));
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expect(testBlock.getMaxIntrinsicHeight(constrained), equals(twoLinesTextHeight));
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final BoxConstraints empty = new BoxConstraints.tight(Size.zero);
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expect(testBlock.getMinIntrinsicWidth(empty), equals(0.0));
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expect(testBlock.getMaxIntrinsicWidth(empty), equals(0.0));
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expect(testBlock.getMinIntrinsicHeight(empty), equals(0.0));
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expect(testBlock.getMaxIntrinsicHeight(empty), equals(0.0));
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});
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}
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