blob: 4069e751d34b197d8b207781ab59daf34b0dee10 [file] [log] [blame]
// Copyright 2019 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.
const { assert } = chai;
import * as Common from '../../../../front_end/common/common.js';
describe('ObjectWrapper', () => {
let obj: Common.ObjectWrapper.ObjectWrapper;
beforeEach(() => {
obj = new Common.ObjectWrapper.ObjectWrapper();
});
describe('event listeners', () => {
it('adds event listeners', (done) => {
obj.addEventListener('foo', () => {
done();
});
obj.dispatchEventToListeners('foo');
});
it('reports event listeners correctly', () => {
const callback = () => {};
obj.addEventListener('foo', callback);
assert.isTrue(obj.hasEventListeners('foo'));
obj.removeEventListener('foo', callback);
assert.isFalse(obj.hasEventListeners('foo'));
});
it('fires event listeners once', async () => {
const fireOnce = obj.once('foo');
obj.dispatchEventToListeners('foo');
await fireOnce;
assert.isFalse(obj.hasEventListeners('foo'));
});
it('fires event listeners multiple times', () => {
let count = 0;
const callback = () => {
count++;
};
obj.addEventListener('foo', callback);
obj.dispatchEventToListeners('foo');
obj.dispatchEventToListeners('foo');
assert.equal(count, 2);
});
it('fires event listeners with data', (done) => {
let count = 0;
const callback = (evt: { data: { bar: string } } ) => {
assert.equal(evt.data.bar, 'baz');
done();
};
obj.addEventListener('foo', callback);
obj.dispatchEventToListeners('foo', { bar: 'baz' });
assert.equal(count, 2);
});
it('handles removal of non-existent listener', () => {
assert.doesNotThrow(() => {
obj.removeEventListener('foo', () => {});
});
});
it('handles dispatch of events with zero listeners', () => {
assert.doesNotThrow(() => {
obj.dispatchEventToListeners('foo');
});
});
});
});