在PhantomJS中使用Jasmine测试$ interval [英] Testing a $interval with Jasmine in PhantomJS
问题描述
似乎我的间隔
永远不会被触发。
It appears that my interval
is never triggered.
我有一个包含<$ c的指令$ c> $ interval 我想测试它。我删除了所有与指令相关的代码,并将其添加到其控制器中:
I have a directive which contains a $interval
and I want to test it. I've removed all the directive-related code and added this piece instead in its controller:
window.called = 0;
window.interval = $interval(function () {
window.called++;
console.log('interval ' + window.called); // 4
}, 10);
console.log('initialized'); // 1
测试如下:
describe('myDirective', function () {
beforeEach(module('myModule'));
beforeEach(function($compile, $rootScope) {
/* ... compile element in its own scope ... */
});
it('should run the interval', function () {
console.log(window.interval); // 2
waitsFor(function () {
console.log('tick'); // 3
return false;
}, 1000);
});
});
这是一个愚蠢的测试。出于调试目的, waitsFor
方法实际上一直返回false。但这就是我在控制台中看到的全部内容:
This is a dumb test. The waitsFor
method actually returns false all the time, for debugging purposes. But this is all I see in the console:
initialized // 1
Object: {then: ..} // 2
tick // 3
tick // 3
tick // 3
tick // 3
..
并最终导致测试失败。我从未在日志中看到一个 interval
。我的代码总体上有什么问题,或者我缺少Jasmine / PhantomJS特有的东西吗?
and eventually the test failure. I never see a single interval
in the logs. Is there something wrong with my code in general or is there something particular to Jasmine/PhantomJS that I'm missing?
推荐答案
$ interval在角度模拟中有一个模拟实现。
确保使用的是与角度版本匹配的角度模拟版本。
$interval has a mock implementation in angular-mocks. Make sure you are using a version of angular-mocks that matches your angular version.
$ interval的模拟版本有一个用于控制滴答的flush方法。
请参阅 ngMock。$ interval
The mock version of $interval has a flush method for controlling ticks. See ngMock.$interval
通过演示查看此小提琴:
//--- CODE --------------------------
angular.module('myModule', []).service('myModuleService', ['$interval', function ($interval) {
var called = 0;
$interval(function () {
called++;
}, 10);
this.getCalled = function () {
return called;
}
}]);
// --- SPECS -------------------------
describe('test $interval', function () {
it('calls the interval callback', function () {
var service, $interval;
angular.mock.module('myModule');
angular.mock.inject(function (myModuleService, _$interval_) {
// Initialize the service under test instance
service = myModuleService;
$interval = _$interval_;
});
expect(service.getCalled()).toEqual(0);
$interval.flush(11);
expect(service.getCalled()).toEqual(1);
$interval.flush(10);
expect(service.getCalled()).toEqual(2);
});
});
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