我目前有一项服务,取决于$cookies中设置的变量.但是,当我想要对服务和$cookies中存储的值之间的交互进行单元测试时,则在实际初始化$cookie值之前始终初始化服务.
所以,我的问题是：如何正确地测试服务和$cookie值之间的交互？ (例如：如何在我的服务初始化之前设置$cookies中的值？)
注意：我使用Angular 1.2和Karma进行单元测试.
解决方法
我找到的唯一可以使用服务(与控制器相对)的方法是在beforeEach中设置的模块中使用$cookieStore上的装饰器.
anagular-mocks让我们以与在代码中类似的方式在规范中配置我们的模块,除了不使用config函数,我们将函数作为第二个参数传递给我们用于调用模块的模块函数.茉莉花.
它看起来像这样：
describe ('my service',function () {
var $cookieStore,myService
beforeEach(module ('myModule',function ($provide) {
// this function configures the "myModule" module before any
// injectables are created.
// We use a decorator to access the cookie store before other
// services are instantiated.
$provide.decorator ('$cookieStore',function ($delegate) {
// at this point the "$cookieStore" service has only just
// been constructed,and is accessible here as "$delegate".
// Services that have "$cookieStore" as an injected
// dependency have not been instantiated yet,so we
// can slip our cookie in now.
$delegate.put ('favorite-cookie','oatmeal');
return $delegate;
});
}));
beforeEach (inject (function (_$cookieStore_,_myService_) {
myService = _myService;
$cookieStore = _$cookieStore_;
}
it ('should interact with the pre-existing "favorite-cookie" cookie',function () {
// your expectations go here.
});
afterEach(function() {
// clean up
$cookieStore.remove ('favorite-cookie');
});
});
