status_transitions_test.dart 2.45 KB
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// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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class TestStatusTransitionWidget extends StatusTransitionWidget {
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  const TestStatusTransitionWidget({
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    super.key,
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    required this.builder,
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    required super.animation,
  });
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  final WidgetBuilder builder;

  @override
  Widget build(BuildContext context) => builder(context);
}

void main() {
  testWidgets('Status transition control test', (WidgetTester tester) async {
    bool didBuild = false;
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    final AnimationController controller = AnimationController(
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      duration: const Duration(seconds: 1),
      vsync: const TestVSync(),
    );

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    await tester.pumpWidget(TestStatusTransitionWidget(
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      animation: controller,
      builder: (BuildContext context) {
        expect(didBuild, isFalse);
        didBuild = true;
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        return Container();
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      },
    ));

    expect(didBuild, isTrue);
    didBuild = false;

    controller.forward();

    expect(didBuild, isFalse);
    await tester.pump();
    expect(didBuild, isTrue);
    didBuild = false;
    await tester.pump(const Duration(milliseconds: 100));
    expect(didBuild, isFalse);
    await tester.pump(const Duration(milliseconds: 850));
    expect(didBuild, isFalse);
    await tester.pump(const Duration(milliseconds: 100));
    expect(didBuild, isTrue);
    didBuild = false;
    controller.forward();
    await tester.pump(const Duration(milliseconds: 100));
    expect(didBuild, isFalse);
    controller.stop();
    await tester.pump(const Duration(milliseconds: 100));
    expect(didBuild, isFalse);

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    final AnimationController anotherController = AnimationController(
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      duration: const Duration(seconds: 1),
      vsync: const TestVSync(),
    );

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    await tester.pumpWidget(TestStatusTransitionWidget(
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      animation: anotherController,
      builder: (BuildContext context) {
        expect(didBuild, isFalse);
        didBuild = true;
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        return Container();
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      },
    ));

    expect(didBuild, isTrue);
    didBuild = false;
    controller.reverse();
    await tester.pump(const Duration(milliseconds: 100));
    expect(didBuild, isFalse);
    anotherController.forward();
    await tester.pump(const Duration(milliseconds: 100));
    expect(didBuild, isTrue);
    didBuild = false;

    controller.stop();
    anotherController.stop();
  });
}