animation_controller_test.dart 7.46 KB
Newer Older
1 2 3 4
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

5
import 'package:flutter_test/flutter_test.dart';
6 7 8 9
import 'package:flutter/animation.dart';
import 'package:flutter/widgets.dart';

void main() {
10
  setUp(() {
11
    WidgetsFlutterBinding.ensureInitialized();
12 13 14 15
    WidgetsBinding.instance.resetEpoch();
  });

  test('Can set value during status callback', () {
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
    AnimationController controller = new AnimationController(
      duration: const Duration(milliseconds: 100)
    );
    bool didComplete = false;
    bool didDismiss = false;
    controller.addStatusListener((AnimationStatus status) {
      if (status == AnimationStatus.completed) {
        didComplete = true;
        controller.value = 0.0;
        controller.forward();
      } else if (status == AnimationStatus.dismissed) {
        didDismiss = true;
        controller.value = 0.0;
        controller.forward();
      }
    });

    controller.forward();
    expect(didComplete, isFalse);
    expect(didDismiss, isFalse);
36
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 1));
37 38
    expect(didComplete, isFalse);
    expect(didDismiss, isFalse);
39
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 2));
40 41
    expect(didComplete, isTrue);
    expect(didDismiss, isTrue);
42 43 44 45

    controller.stop();
  });

46
  test('Receives status callbacks for forward and reverse', () {
47 48 49 50 51 52 53 54 55 56 57 58 59
    AnimationController controller = new AnimationController(
      duration: const Duration(milliseconds: 100)
    );
    List<double> valueLog = <double>[];
    List<AnimationStatus> log = <AnimationStatus>[];
    controller
      ..addStatusListener((AnimationStatus status) {
        log.add(status);
      })
      ..addListener(() {
        valueLog.add(controller.value);
      });

60 61
    expect(log, equals(<AnimationStatus>[]));
    expect(valueLog, equals(<AnimationStatus>[]));
62 63 64

    controller.forward();

65 66
    expect(log, equals(<AnimationStatus>[AnimationStatus.forward]));
    expect(valueLog, equals(<AnimationStatus>[]));
67 68 69

    controller.reverse();

70 71
    expect(log, equals(<AnimationStatus>[AnimationStatus.forward, AnimationStatus.dismissed]));
    expect(valueLog, equals(<AnimationStatus>[]));
72 73 74

    controller.reverse();

75 76
    expect(log, equals(<AnimationStatus>[AnimationStatus.forward, AnimationStatus.dismissed]));
    expect(valueLog, equals(<AnimationStatus>[]));
77 78 79 80

    log.clear();
    controller.forward();

81 82
    expect(log, equals(<AnimationStatus>[AnimationStatus.forward]));
    expect(valueLog, equals(<AnimationStatus>[]));
83 84 85

    controller.forward();

86 87
    expect(log, equals(<AnimationStatus>[AnimationStatus.forward]));
    expect(valueLog, equals(<AnimationStatus>[]));
88 89 90 91

    controller.reverse();
    log.clear();

92
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 10));
93 94
    expect(log, equals(<AnimationStatus>[]));
    expect(valueLog, equals(<AnimationStatus>[]));
95
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 20));
96 97
    expect(log, equals(<AnimationStatus>[]));
    expect(valueLog, equals(<AnimationStatus>[]));
98
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 30));
99 100
    expect(log, equals(<AnimationStatus>[]));
    expect(valueLog, equals(<AnimationStatus>[]));
101
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 40));
102 103
    expect(log, equals(<AnimationStatus>[]));
    expect(valueLog, equals(<AnimationStatus>[]));
104 105

    controller.stop();
106
  });
107

108
  test('Forward and reverse from values', () {
109 110 111 112 113 114 115 116 117 118 119 120 121 122
    AnimationController controller = new AnimationController(
      duration: const Duration(milliseconds: 100)
    );
    List<double> valueLog = <double>[];
    List<AnimationStatus> statusLog = <AnimationStatus>[];
    controller
      ..addStatusListener((AnimationStatus status) {
        statusLog.add(status);
      })
      ..addListener(() {
        valueLog.add(controller.value);
      });

    controller.reverse(from: 0.2);
123 124
    expect(statusLog, equals(<AnimationStatus>[ AnimationStatus.reverse ]));
    expect(valueLog, equals(<double>[ 0.2 ]));
125 126 127 128 129
    expect(controller.value, equals(0.2));
    statusLog.clear();
    valueLog.clear();

    controller.forward(from: 0.0);
130 131
    expect(statusLog, equals(<AnimationStatus>[ AnimationStatus.dismissed, AnimationStatus.forward ]));
    expect(valueLog, equals(<double>[ 0.0 ]));
132 133
    expect(controller.value, equals(0.0));
  });
134

135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
  test('Forward only from value', () {
    AnimationController controller = new AnimationController(
      duration: const Duration(milliseconds: 100)
    );
    List<double> valueLog = <double>[];
    List<AnimationStatus> statusLog = <AnimationStatus>[];
    controller
      ..addStatusListener((AnimationStatus status) {
        statusLog.add(status);
      })
      ..addListener(() {
        valueLog.add(controller.value);
      });

    controller.forward(from: 0.2);
    expect(statusLog, equals(<AnimationStatus>[ AnimationStatus.forward ]));
    expect(valueLog, equals(<double>[ 0.2 ]));
    expect(controller.value, equals(0.2));
  });

155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
  test('Can fling to upper and lower bounds', () {
    AnimationController controller = new AnimationController(
      duration: const Duration(milliseconds: 100)
    );

    controller.fling();
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 1));
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 2));
    expect(controller.value, 1.0);
    controller.stop();

    AnimationController largeRangeController = new AnimationController(
      duration: const Duration(milliseconds: 100),
      lowerBound: -30.0,
      upperBound: 45.0
    );

    largeRangeController.fling();
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 3));
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 4));
    expect(largeRangeController.value, 45.0);
    largeRangeController.fling(velocity: -1.0);
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 5));
    WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 6));
    expect(largeRangeController.value, -30.0);
    largeRangeController.stop();
  });
182 183 184 185 186 187 188 189 190 191 192 193

  test('lastElapsedDuration control test', () {
    AnimationController controller = new AnimationController(
      duration: const Duration(milliseconds: 100)
    );
    controller.forward();
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 20));
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 30));
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 40));
    expect(controller.lastElapsedDuration, equals(const Duration(milliseconds: 20)));
    controller.stop();
  });
194 195 196 197 198

  test('toString control test', () {
    AnimationController controller = new AnimationController(
      duration: const Duration(milliseconds: 100)
    );
199
    expect(controller.toString(), hasOneLineDescription);
200 201 202
    controller.forward();
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 20));
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 30));
203
    expect(controller.toString(), hasOneLineDescription);
204
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 120));
205
    expect(controller.toString(), hasOneLineDescription);
206 207 208
    controller.reverse();
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 20));
    WidgetsBinding.instance.handleBeginFrame(const Duration(milliseconds: 30));
209
    expect(controller.toString(), hasOneLineDescription);
210 211
    controller.stop();
  });
212
}