javascript – Angular.js单元测试“inject()”在“运行”阶段块之前触发

我有一个场景,我正在尝试为移动设备加载HTML5音频,这只能通过用户交互(例如ontouchstart)来实现.我已经在Angular运行阶段实现了这个逻辑,以确保它尽早附加.我无法在配置阶段附加它,因为它依赖于其他Angular工厂：

angular.module('MyModule')
    .run(['Device', 'ResourceManager', 'ExceptionFactory', function (Device, ResourceManager, ExceptionFactory) {
        if (!Device.browser.features.webaudio) {
            var onFirstUserInteraction = function () {
                var sounds = ResourceManager.getSounds();

                if (sounds.length > 1) {
                    throw ExceptionFactory.create('Html5AudioLimitReachedException', 'Html5 Audio Devices can only load one sound resource');
                }

                if (sounds.length === 1) {
                    sounds[0].createBrowserAudioObject();
                }

                document.documentElement.removeEventListener(Device.browser.is.IE ? 'click' : 'touchstart', onFirstUserInteraction, true);
            };

            document.documentElement.addEventListener(Device.browser.is.IE ? 'click' : 'touchstart', onFirstUserInteraction, true);
        }
    }]);

我有以下单元测试失败,因为上面的事件处理程序尚未及时注册：

beforeEach(function () {
    angular.module('Html5SoundLoaderApp', [])
        .run(['Device', 'ResourceManager', function (Device, ResourceManager) {
            Device.browser.features.webaudio = false;
            ResourceManager.addSound('testOne', 'test/url/testOne.mp3', {});
            ResourceManager.addSound('testTwo', 'test/url/testTwo.mp3', {});
        }]);

    module('Html5SoundLoaderApp');
});

it('should only be able to load one sound resource', inject(['ExceptionFactory', function (ExceptionFactory) {
    var spy = sinon.spy(ExceptionFactory, 'create');

    expect(function () {
        angular.mock.ui.trigger(document.documentElement, 'touchstart')
    }).to.throw();

    spy.should.have.been.calledOnce;
    spy.should.have.been.calledWith('Html5AudioLimitReachedException', 'Html5 Audio Devices can only load one sound resource');
}]));

我希望run()块在测试开始之前完成执行？这个假设我错了吗？如果是这样,如何解决这种情况最好？

谢谢

解决方法:

该代码看起来与我异步(因为它等待用户交互,一方面),所以使用done()回调：

beforeEach(function (done) { // <--- Add this parameter.
    angular.module('Html5SoundLoaderApp', [])
        .run(['Device', 'ResourceManager', function (Device, ResourceManager) {
            Device.browser.features.webaudio = false;
            ResourceManager.addSound('testOne', 'test/url/testOne.mp3', {});
            ResourceManager.addSound('testTwo', 'test/url/testTwo.mp3', {});
            done(); // <--- It looks to me like this is where done() should be called.
        }]);

    module('Html5SoundLoaderApp');
});

您必须对任何异步执行的工作使用done().否则,摩卡只是前进而不等待工作进行.

标签：javascript,angularjs,unit-testing,mocha,karma-runner
来源： https://codeday.me/bug/20190703/1365841.html