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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/material.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:test/test.dart';
void main() {
test('Slider can move when tapped', () {
testWidgets((WidgetTester tester) {
Key sliderKey = new UniqueKey();
double value = 0.0;
tester.pumpWidget(
new StatefulBuilder(
builder: (BuildContext context, StateSetter setState) {
return new Material(
child: new Center(
child: new Slider(
key: sliderKey,
value: value,
onChanged: (double newValue) {
setState(() {
value = newValue;
});
}
)
)
);
}
)
);
expect(value, equals(0.0));
tester.tap(tester.findElementByKey(sliderKey));
expect(value, equals(0.5));
tester.pump(); // No animation should start.
expect(Scheduler.instance.transientCallbackCount, equals(0));
});
});
test('Slider take on discrete values', () {
testWidgets((WidgetTester tester) {
Key sliderKey = new UniqueKey();
double value = 0.0;
tester.pumpWidget(
new StatefulBuilder(
builder: (BuildContext context, StateSetter setState) {
return new Material(
child: new Center(
child: new Slider(
key: sliderKey,
min: 0.0,
max: 100.0,
divisions: 10,
value: value,
onChanged: (double newValue) {
setState(() {
value = newValue;
});
}
)
)
);
}
)
);
expect(value, equals(0.0));
tester.tap(tester.findElementByKey(sliderKey));
expect(value, equals(50.0));
tester.scroll(tester.findElementByKey(sliderKey), const Offset(5.0, 0.0));
expect(value, equals(50.0));
tester.scroll(tester.findElementByKey(sliderKey), const Offset(40.0, 0.0));
expect(value, equals(80.0));
tester.pump(); // Starts animation.
expect(Scheduler.instance.transientCallbackCount, greaterThan(0));
tester.pump(const Duration(milliseconds: 200));
tester.pump(const Duration(milliseconds: 200));
tester.pump(const Duration(milliseconds: 200));
tester.pump(const Duration(milliseconds: 200));
// Animation complete.
expect(Scheduler.instance.transientCallbackCount, equals(0));
});
});
}