f38743593d
This adds a simple spacer widget first suggested by Scott Stoll (@ScottS2017) in the abandoned PR #15802 This PR replaces that one, cleans it up, and adds a test.
56 lines
2.2 KiB
Dart
56 lines
2.2 KiB
Dart
// Copyright 2018 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_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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void main() {
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testWidgets('Spacer takes up space.', (WidgetTester tester) async {
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await tester.pumpWidget(new Column(
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children: const <Widget>[
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const SizedBox(width: 10.0, height: 10.0),
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const Spacer(),
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const SizedBox(width: 10.0, height: 10.0),
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],
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));
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final Rect spacerRect = tester.getRect(find.byType(Spacer));
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expect(spacerRect.size, const Size(800.0, 580.0));
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expect(spacerRect.topLeft, const Offset(0.0, 10.0));
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});
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testWidgets('Spacer takes up space proportional to flex.', (WidgetTester tester) async {
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const Spacer spacer1 = const Spacer();
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const Spacer spacer2 = const Spacer(flex: 1);
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const Spacer spacer3 = const Spacer(flex: 2);
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const Spacer spacer4 = const Spacer(flex: 4);
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await tester.pumpWidget(new Row(
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textDirection: TextDirection.rtl,
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children: const <Widget>[
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const SizedBox(width: 10.0, height: 10.0),
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spacer1,
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const SizedBox(width: 10.0, height: 10.0),
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spacer2,
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const SizedBox(width: 10.0, height: 10.0),
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spacer3,
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const SizedBox(width: 10.0, height: 10.0),
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spacer4,
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const SizedBox(width: 10.0, height: 10.0),
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],
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));
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final Rect spacer1Rect = tester.getRect(find.byType(Spacer).at(0));
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final Rect spacer2Rect = tester.getRect(find.byType(Spacer).at(1));
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final Rect spacer3Rect = tester.getRect(find.byType(Spacer).at(2));
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final Rect spacer4Rect = tester.getRect(find.byType(Spacer).at(3));
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expect(spacer1Rect.size.height, 600.0);
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expect(spacer1Rect.size.width, closeTo(93.8, 0.1));
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expect(spacer1Rect.left, closeTo(696.3, 0.1));
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expect(spacer2Rect.size.width, closeTo(93.8, 0.1));
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expect(spacer2Rect.left, closeTo(592.5, 0.1));
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expect(spacer3Rect.size.width, spacer2Rect.size.width * 2.0);
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expect(spacer3Rect.left, closeTo(395.0, 0.1));
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expect(spacer4Rect.size.width, spacer3Rect.size.width * 2.0);
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expect(spacer4Rect.left, closeTo(10.0, 0.1));
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});
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}
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