// 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. // @dart = 2.8 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)); }); }