@cainiaofe/cn-utils/es/__tests__/events.test.js

菜鸟前端基础工具库

import { events } from "../index";
test('events emit test', function () {
    var onTriggerMethod = jest.fn();
    events.on('test method 1', onTriggerMethod);
    events.emit('test method 1', 'a');
    expect(onTriggerMethod).toBeCalledTimes(1);
    expect(onTriggerMethod).toBeCalledWith('a');
});
test('events once test', function () {
    var onTriggerMethod = jest.fn();
    events.once('test method 2', onTriggerMethod);
    events.emit('test method 2', 'a');
    events.emit('test method 2', 'b');
    events.emit('test method 2', 'c');
    expect(onTriggerMethod).toBeCalledTimes(1);
    expect(onTriggerMethod).toBeCalledWith('a');
});