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// 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.
import 'package:flutter/animation.dart';
import 'package:flutter/widgets.dart';
import 'package:test/test.dart';
void main() {
test("Can set value during status callback", () {
WidgetsFlutterBinding.ensureInitialized();
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);
WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 1));
expect(didComplete, isFalse);
expect(didDismiss, isFalse);
WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 2));
expect(didComplete, isTrue);
expect(didDismiss, isTrue);
controller.stop();
});
test("Receives status callbacks for forward and reverse", () {
WidgetsFlutterBinding.ensureInitialized();
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);
});
expect(log, equals(<AnimationStatus>[]));
expect(valueLog, equals(<AnimationStatus>[]));
controller.forward();
expect(log, equals(<AnimationStatus>[AnimationStatus.forward]));
expect(valueLog, equals(<AnimationStatus>[]));
controller.reverse();
expect(log, equals(<AnimationStatus>[AnimationStatus.forward, AnimationStatus.dismissed]));
expect(valueLog, equals(<AnimationStatus>[]));
controller.reverse();
expect(log, equals(<AnimationStatus>[AnimationStatus.forward, AnimationStatus.dismissed]));
expect(valueLog, equals(<AnimationStatus>[]));
log.clear();
controller.forward();
expect(log, equals(<AnimationStatus>[AnimationStatus.forward]));
expect(valueLog, equals(<AnimationStatus>[]));
controller.forward();
expect(log, equals(<AnimationStatus>[AnimationStatus.forward]));
expect(valueLog, equals(<AnimationStatus>[]));
controller.reverse();
log.clear();
WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 10));
expect(log, equals(<AnimationStatus>[]));
expect(valueLog, equals(<AnimationStatus>[]));
WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 20));
expect(log, equals(<AnimationStatus>[]));
expect(valueLog, equals(<AnimationStatus>[]));
WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 30));
expect(log, equals(<AnimationStatus>[]));
expect(valueLog, equals(<AnimationStatus>[]));
WidgetsBinding.instance.handleBeginFrame(const Duration(seconds: 40));
expect(log, equals(<AnimationStatus>[]));
expect(valueLog, equals(<AnimationStatus>[]));
controller.stop();
});
test("Forward and reverse from values", () {
WidgetsFlutterBinding.ensureInitialized();
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);
expect(statusLog, equals(<AnimationStatus>[ AnimationStatus.reverse ]));
expect(valueLog, equals(<double>[ 0.2 ]));
expect(controller.value, equals(0.2));
statusLog.clear();
valueLog.clear();
controller.forward(from: 0.0);
expect(statusLog, equals(<AnimationStatus>[ AnimationStatus.dismissed, AnimationStatus.forward ]));
expect(valueLog, equals(<double>[ 0.0 ]));
expect(controller.value, equals(0.0));
});
}