blob: cc3c7a68b6f9cce2f189e29bbc61b2f99fde9426 [file] [log] [blame]
// 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/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
test('list body and paragraph intrinsics', () {
final RenderParagraph paragraph = RenderParagraph(
const TextSpan(
style: TextStyle(height: 1.0),
text: 'Hello World',
),
textDirection: TextDirection.ltr,
);
final RenderListBody testBlock = RenderListBody(
children: <RenderBox>[
paragraph,
],
);
final double textWidth = paragraph.getMaxIntrinsicWidth(double.infinity);
final double oneLineTextHeight = paragraph.getMinIntrinsicHeight(double.infinity);
final double constrainedWidth = textWidth * 0.9;
final double wrappedTextWidth = paragraph.getMinIntrinsicWidth(double.infinity);
final double twoLinesTextHeight = paragraph.getMinIntrinsicHeight(constrainedWidth);
final double manyLinesTextHeight = paragraph.getMinIntrinsicHeight(0.0);
// paragraph
expect(wrappedTextWidth, greaterThan(0.0));
expect(wrappedTextWidth, lessThan(textWidth));
expect(oneLineTextHeight, lessThan(twoLinesTextHeight));
expect(twoLinesTextHeight, lessThan(oneLineTextHeight * 3.0));
expect(manyLinesTextHeight, greaterThan(twoLinesTextHeight));
expect(paragraph.getMaxIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
expect(paragraph.getMaxIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
expect(paragraph.getMaxIntrinsicHeight(0.0), equals(manyLinesTextHeight));
// vertical block (same expectations)
expect(testBlock.getMinIntrinsicWidth(double.infinity), equals(wrappedTextWidth));
expect(testBlock.getMaxIntrinsicWidth(double.infinity), equals(textWidth));
expect(testBlock.getMinIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
expect(testBlock.getMinIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
expect(testBlock.getMaxIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
expect(testBlock.getMaxIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
expect(testBlock.getMinIntrinsicWidth(0.0), equals(wrappedTextWidth));
expect(testBlock.getMaxIntrinsicWidth(0.0), equals(textWidth));
expect(testBlock.getMinIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
expect(testBlock.getMaxIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
expect(testBlock.getMinIntrinsicHeight(0.0), equals(manyLinesTextHeight));
expect(testBlock.getMaxIntrinsicHeight(0.0), equals(manyLinesTextHeight));
// horizontal block (same expectations again)
testBlock.axisDirection = AxisDirection.right;
expect(testBlock.getMinIntrinsicWidth(double.infinity), equals(wrappedTextWidth));
expect(testBlock.getMaxIntrinsicWidth(double.infinity), equals(textWidth));
expect(testBlock.getMinIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
expect(testBlock.getMinIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
expect(testBlock.getMaxIntrinsicHeight(double.infinity), equals(oneLineTextHeight));
expect(testBlock.getMaxIntrinsicHeight(constrainedWidth), equals(twoLinesTextHeight));
expect(testBlock.getMinIntrinsicWidth(0.0), equals(wrappedTextWidth));
expect(testBlock.getMaxIntrinsicWidth(0.0), equals(textWidth));
expect(testBlock.getMinIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
expect(testBlock.getMaxIntrinsicHeight(wrappedTextWidth), equals(twoLinesTextHeight));
expect(testBlock.getMinIntrinsicHeight(0.0), equals(manyLinesTextHeight));
expect(testBlock.getMaxIntrinsicHeight(0.0), equals(manyLinesTextHeight));
});
}