jasmine提供了很多些很实用的处理Promises的方法，首先我们来考虑下面的这个例子：
angular.module("myApp.store").controller("StoresCtrl", function($scope, StoreService, Contact) {
StoreService.listStores().then(function(branches) {
Contact.retrieveContactInfo().then(function(userInfo) {
//more code here crossing user and stores data
});
});
});
下面让我们来尝试如何用angular提供的$provide创建一个依赖的实现，以及利用jasmine帮助我们fake方法的返回值：
代码如下，有详细注释帮助你去理解这段代码：
describe("Store Controller", function() {
var $controller, Contact, StoreService, createController, scope;
beforeEach(function() {
module('myApp.store');
// Provide will help us create fake implementations for our dependencies
module(function($provide) {
// Fake StoreService Implementation returning a promise
$provide.value('StoreService', {
listStores: function() {
return {
then: function(callback) {return callback([{ some: "thing", hoursInfo: {isOpen: true}}]);}
};
},
chooseStore: function() { return null;}
});
// Fake Contact Implementation return an empty object
$provide.value('Contact', {
retrieveContactInfo: function() {
return {
then: function(callback) { return callback({});}
};
}
});
return null;
});
});
beforeEach(function() {
// When Angular Injects the StoreService and Contact dependencies,
// it will use the implementation we provided above
inject(function($controller, $rootScope, _StoreService_, _Contact_) {
scope = $rootScope.$new();
StoreService = _StoreService_;
Contact = _Contact_;
createController = function(params) {
return $controller("StoresCtrl", {
$scope: scope,
$stateParams: params || {}
});
};
});
});
it("should call the store service to retrieve the store list", function() {
var user = { address: {street: 1}};
// Jasmine spy over the listStores service.
// Since we provided a fake response already we can just call through.
spyOn(StoreService, 'listStores').and.callThrough();
// Jasmine spy also allows to call Fake implementations via the callFake function
// or we can return our own response via 'and.returnValue
// Here we can override the response we previously defined and return a promise with a user object
spyOn(Contact, 'retrieveContactInfo').and.callFake(function() {
return {
then: function(callback) { return callback(user); }
};
});
createController();
// Since we setup a spy we can now expect that spied function to have been called
// or to have been called with certain parameters..etc
expect(StoreService.listStores).toHaveBeenCalled();
});
});