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// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.9
library wheel_event_test;
import 'dart:async';
import 'dart:html';
import 'package:expect/minitest.dart';
Future testWheelEvent() async {
final done = new Completer();
var element = new DivElement();
var eventType = Element.mouseWheelEvent.getEventType(element);
element.onMouseWheel.listen((e) {
try {
expect(e.screen.x, 100);
expect(e.deltaX, 0);
expect(e.deltaY.toDouble(), 240.0);
expect(e.deltaMode, WheelEvent.DOM_DELTA_PAGE);
done.complete();
} catch (e) {
done.completeError(e);
}
});
var event = new WheelEvent(eventType,
deltaX: 0,
deltaY: 240,
deltaMode: WheelEvent.DOM_DELTA_PAGE,
screenX: 100);
element.dispatchEvent(event);
await done.future;
}
Future testWheelEventWithDeltaZ() async {
final done = new Completer();
var element = new DivElement();
var eventType = Element.mouseWheelEvent.getEventType(element);
element.onMouseWheel.listen((e) {
try {
expect(e.deltaX, 0);
expect(e.deltaY, 0);
expect(e.screen.x, 0);
expect(e.deltaZ.toDouble(), 1.0);
done.complete();
} catch (e) {
done.completeError(e);
}
});
var event = new WheelEvent(eventType, deltaZ: 1.0);
element.dispatchEvent(event);
await done.future;
}
Future testWheelEventStream() async {
final done = new Completer();
var element = new DivElement();
var eventType = Element.mouseWheelEvent.getEventType(element);
element.onMouseWheel.listen((e) {
try {
expect(e.screen.x, 100);
expect(e.deltaX.toDouble(), 240.0);
expect(e.deltaY, 0);
done.complete();
} catch (e) {
done.completeError(e);
}
});
var event = new WheelEvent(eventType, deltaX: 240, deltaY: 0, screenX: 100);
element.dispatchEvent(event);
await done.future;
}
main() async {
await testWheelEvent();
await testWheelEventWithDeltaZ();
await testWheelEventStream();
}