TypeScript EventEmitter.EventEmitter类代码示例

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本文整理汇总了TypeScript中common/EventEmitter.EventEmitter类的典型用法代码示例。如果您正苦于以下问题：TypeScript EventEmitter类的具体用法？TypeScript EventEmitter怎么用？TypeScript EventEmitter使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了EventEmitter类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的TypeScript代码示例。

示例1: describe

describe('EventEmitter', () => {
  let eventEmitter: EventEmitter;

  beforeEach(() => {
    eventEmitter = new EventEmitter();
  });

  describe('emit', () => {
    it('should emit events to listeners', () => {
      let count1 = 0;
      let count2 = 0;
      const listener1 = () => count1++;
      const listener2 = () => count2++;
      eventEmitter.on('test', listener1);
      eventEmitter.on('test', listener2);
      eventEmitter.emit('test');
      assert.equal(count1, 1);
      assert.equal(count2, 1);
      eventEmitter.emit('test');
      assert.equal(count1, 2);
      assert.equal(count2, 2);
    });

    it('should manage multiple listener types', () => {
      let count1 = 0;
      let count2 = 0;
      const listener1 = () => count1++;
      const listener2 = () => count2++;
      eventEmitter.on('test', listener1);
      eventEmitter.on('foo', listener2);
      eventEmitter.emit('test');
      assert.equal(count1, 1);
      assert.equal(count2, 0);
      eventEmitter.emit('foo');
      assert.equal(count1, 1);
      assert.equal(count2, 1);
    });
  });

  describe('listeners', () => {
    it('should return listeners for the type requested', () => {
      assert.equal(eventEmitter.listeners('test').length, 0);
      const listener = () => {};
      eventEmitter.on('test', listener);
      assert.deepEqual(eventEmitter.listeners('test'), [listener]);
    });
  });

  describe('off', () => {
    it('should remove the specific listener', () => {
      const listener1 = () => {};
      const listener2 = () => {};
      eventEmitter.on('foo', listener1);
      eventEmitter.on('foo', listener2);
      assert.equal(eventEmitter.listeners('foo').length, 2);
      eventEmitter.off('foo', listener1);
      assert.deepEqual(eventEmitter.listeners('foo'), [listener2]);
    });
  });

  describe('removeAllListeners', () => {
    it('should clear all listeners', () => {
      eventEmitter.on('foo', () => {});
      assert.equal(eventEmitter.listeners('foo').length, 1);
      eventEmitter.removeAllListeners('foo');
      assert.equal(eventEmitter.listeners('foo').length, 0);
    });
  });
});

开发者ID:sourcelair，项目名称:xterm.js，代码行数:69，代码来源:EventEmitter.test.ts

示例2: it

 it('should remove the specific listener', () => {
   const listener1 = () => {};
   const listener2 = () => {};
   eventEmitter.on('foo', listener1);
   eventEmitter.on('foo', listener2);
   assert.equal(eventEmitter.listeners('foo').length, 2);
   eventEmitter.off('foo', listener1);
   assert.deepEqual(eventEmitter.listeners('foo'), [listener2]);
 });

开发者ID:sourcelair，项目名称:xterm.js，代码行数:9，代码来源:EventEmitter.test.ts

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