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// Copyright 2014 The Flutter 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_test/flutter_test.dart';
void main() {
test('MaterialStatesController constructor', () {
expect(MaterialStatesController().value, <MaterialState>{});
expect(MaterialStatesController(<MaterialState>{}).value, <MaterialState>{});
expect(MaterialStatesController(<MaterialState>{MaterialState.selected}).value, <MaterialState>{MaterialState.selected});
});
test('MaterialStatesController update, listener', () {
int count = 0;
void valueChanged() {
count += 1;
}
final MaterialStatesController controller = MaterialStatesController();
controller.addListener(valueChanged);
controller.update(MaterialState.selected, true);
expect(controller.value, <MaterialState>{MaterialState.selected});
expect(count, 1);
controller.update(MaterialState.selected, true);
expect(controller.value, <MaterialState>{MaterialState.selected});
expect(count, 1);
controller.update(MaterialState.hovered, false);
expect(count, 1);
expect(controller.value, <MaterialState>{MaterialState.selected});
controller.update(MaterialState.selected, false);
expect(count, 2);
expect(controller.value, <MaterialState>{});
controller.update(MaterialState.hovered, true);
expect(controller.value, <MaterialState>{MaterialState.hovered});
expect(count, 3);
controller.update(MaterialState.hovered, true);
expect(controller.value, <MaterialState>{MaterialState.hovered});
expect(count, 3);
controller.update(MaterialState.pressed, true);
expect(controller.value, <MaterialState>{MaterialState.hovered, MaterialState.pressed});
expect(count, 4);
controller.update(MaterialState.selected, true);
expect(controller.value, <MaterialState>{MaterialState.hovered, MaterialState.pressed, MaterialState.selected});
expect(count, 5);
controller.update(MaterialState.selected, false);
expect(controller.value, <MaterialState>{MaterialState.hovered, MaterialState.pressed});
expect(count, 6);
controller.update(MaterialState.selected, false);
expect(controller.value, <MaterialState>{MaterialState.hovered, MaterialState.pressed});
expect(count, 6);
controller.update(MaterialState.pressed, false);
expect(controller.value, <MaterialState>{MaterialState.hovered});
expect(count, 7);
controller.update(MaterialState.hovered, false);
expect(controller.value, <MaterialState>{});
expect(count, 8);
controller.removeListener(valueChanged);
controller.update(MaterialState.selected, true);
expect(controller.value, <MaterialState>{MaterialState.selected});
expect(count, 8);
});
test('MaterialStatesController const initial value', () {
int count = 0;
void valueChanged() {
count += 1;
}
final MaterialStatesController controller = MaterialStatesController(const <MaterialState>{MaterialState.selected});
controller.addListener(valueChanged);
controller.update(MaterialState.selected, true);
expect(controller.value, <MaterialState>{MaterialState.selected});
expect(count, 0);
controller.update(MaterialState.selected, false);
expect(controller.value, <MaterialState>{});
expect(count, 1);
});
}