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// 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/material.dart';
import 'package:flutter/rendering.dart';
import '../flutter_test_alternative.dart';
import 'rendering_tester.dart';
void main() {
test('overflow should not affect baseline', () {
RenderBox root, child, text;
double baseline1, baseline2, height1, height2;
root = RenderPositionedBox(
child: RenderCustomPaint(
child: child = text = RenderParagraph(
const TextSpan(text: 'Hello World'),
textDirection: TextDirection.ltr,
),
painter: TestCallbackPainter(
onPaint: () {
baseline1 = child.getDistanceToBaseline(TextBaseline.alphabetic);
height1 = text.size.height;
},
),
),
);
layout(root, phase: EnginePhase.paint);
root = RenderPositionedBox(
child: RenderCustomPaint(
child: child = RenderConstrainedOverflowBox(
child: text = RenderParagraph(
const TextSpan(text: 'Hello World'),
textDirection: TextDirection.ltr,
),
maxHeight: height1 / 2.0,
alignment: Alignment.topLeft,
),
painter: TestCallbackPainter(
onPaint: () {
baseline2 = child.getDistanceToBaseline(TextBaseline.alphabetic);
height2 = text.size.height;
},
),
),
);
layout(root, phase: EnginePhase.paint);
expect(baseline1, lessThan(height1));
expect(height2, equals(height1 / 2.0));
expect(baseline2, equals(baseline1));
expect(baseline2, greaterThan(height2));
});
}