// 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 'package:flutter_test/flutter_test.dart'; void main() { testWidgets('Custom background color respected', (WidgetTester tester) async { const Color color = Colors.pink; await tester.pumpWidget( MaterialApp( home: MaterialBanner( backgroundColor: color, content: const Text('I am a banner'), actions: <Widget>[ FlatButton( child: const Text('Action'), onPressed: () { }, ), ], ), ), ); final Container container = _getContainerFromBanner(tester); expect(container.color, color); }); testWidgets('Custom content TextStyle respected', (WidgetTester tester) async { const String contentText = 'Content'; const TextStyle contentTextStyle = TextStyle(color: Colors.pink); await tester.pumpWidget( MaterialApp( home: MaterialBanner( contentTextStyle: contentTextStyle, content: const Text(contentText), actions: <Widget>[ FlatButton( child: const Text('Action'), onPressed: () { }, ), ], ), ), ); final RenderParagraph content = _getTextRenderObjectFromDialog(tester, contentText); expect(content.text.style, contentTextStyle); }); testWidgets('Actions laid out below content if more than one action', (WidgetTester tester) async { const String contentText = 'Content'; await tester.pumpWidget( MaterialApp( home: MaterialBanner( content: const Text(contentText), actions: <Widget>[ FlatButton( child: const Text('Action 1'), onPressed: () { }, ), FlatButton( child: const Text('Action 2'), onPressed: () { }, ), ], ), ), ); final Offset contentBottomLeft = tester.getBottomLeft(find.text(contentText)); final Offset actionsTopRight = tester.getTopLeft(find.byType(ButtonBar)); expect(contentBottomLeft.dy, lessThan(actionsTopRight.dy)); expect(contentBottomLeft.dx, greaterThan(actionsTopRight.dx)); }); testWidgets('Actions laid out beside content if only one action', (WidgetTester tester) async { const String contentText = 'Content'; await tester.pumpWidget( MaterialApp( home: MaterialBanner( content: const Text(contentText), actions: <Widget>[ FlatButton( child: const Text('Action'), onPressed: () { }, ), ], ), ), ); final Offset contentBottomLeft = tester.getBottomLeft(find.text(contentText)); final Offset actionsTopRight = tester.getTopRight(find.byType(ButtonBar)); expect(contentBottomLeft.dy, greaterThan(actionsTopRight.dy)); expect(contentBottomLeft.dx, lessThan(actionsTopRight.dx)); }); // Regression test for https://github.com/flutter/flutter/issues/39574 testWidgets('Single action laid out beside content but aligned to the trailing edge', (WidgetTester tester) async { await tester.pumpWidget( MaterialApp( home: MaterialBanner( content: const Text('Content'), actions: <Widget>[ FlatButton( child: const Text('Action'), onPressed: () { }, ), ], ), ), ); final Offset actionsTopRight = tester.getTopRight(find.byType(ButtonBar)); final Offset bannerTopRight = tester.getTopRight(find.byType(MaterialBanner)); expect(actionsTopRight.dx, bannerTopRight.dx); }); // Regression test for https://github.com/flutter/flutter/issues/39574 testWidgets('Single action laid out beside content but aligned to the trailing edge - RTL', (WidgetTester tester) async { await tester.pumpWidget( MaterialApp( home: Directionality( textDirection: TextDirection.rtl, child: MaterialBanner( content: const Text('Content'), actions: <Widget>[ FlatButton( child: const Text('Action'), onPressed: () { }, ), ], ), ), ), ); final Offset actionsTopLeft = tester.getTopLeft(find.byType(ButtonBar)); final Offset bannerTopLeft = tester.getTopLeft(find.byType(MaterialBanner)); expect(actionsTopLeft.dx, bannerTopLeft.dx); }); testWidgets('Actions laid out below content if forced override', (WidgetTester tester) async { const String contentText = 'Content'; await tester.pumpWidget( MaterialApp( home: MaterialBanner( forceActionsBelow: true, content: const Text(contentText), actions: <Widget>[ FlatButton( child: const Text('Action'), onPressed: () { }, ), ], ), ), ); final Offset contentBottomLeft = tester.getBottomLeft(find.text(contentText)); final Offset actionsTopRight = tester.getTopLeft(find.byType(ButtonBar)); expect(contentBottomLeft.dy, lessThan(actionsTopRight.dy)); expect(contentBottomLeft.dx, greaterThan(actionsTopRight.dx)); }); } Container _getContainerFromBanner(WidgetTester tester) { return tester.widget<Container>(find.descendant(of: find.byType(MaterialBanner), matching: find.byType(Container)).first); } RenderParagraph _getTextRenderObjectFromDialog(WidgetTester tester, String text) { return tester.element<StatelessElement>(find.descendant(of: find.byType(MaterialBanner), matching: find.text(text))).renderObject as RenderParagraph; }