Angular Jasmine spyOn查询调用

Question

我是Angular和Jasmine的新手，当我试图伪造一个服务“查询”调用时，我遇到了一些问题。下面用“describe”括起来：

var mockBackend;

beforeEach(inject(function($rootScope, $controller, AppServ) {
  // We need to setup our controllers to use fake services provided by angular-mocks
  $scope = $rootScope.$new();
  mockBackend = AppServ;

  $controller('AppInformationController', {
    $scope: $scope,
    AppServ: mockBackend
  });
}));

it("should try to call the service, but we intercept it", function() {
  spyOn(mockBackend, 'query').andReturn({'title':'Mock title'});

  $scope.serverAppNameChange();
  expect($scope.app.title).toBe("Mock title");
});

上面的"AppServ“是我的服务，每当测试对该服务调用"query”以返回一些默认信息时，我都会进行拦截。实际上，这只是为了了解Jasmine和Angular是如何工作的。服务本身什么也不做，只保留一个本地副本(它基本上是一个假服务)。

以下是该服务：

Services.factory("AppServ", function($http) {
  var app = {};
  var theAppOnServer = {};

  app['query'] = function() {
    return theAppOnServer;
  };

  app['save'] = function(app) {
    theAppOnServer = $.extend({}, app);
  };

  app['updateApp'] = function() {
    theAppOnServer['title'] = "Title From Server";
  };

  return app;
});

下面是控制器：

MobileIntake.controller("AppInformationController", function($scope, AppServ) {
  $scope.app = AppServ.query();

  //var AppOverviewController = function($scope) {
  $scope.appNameChange = function(oldValue, newValue, scope) {
    console.log("You've changed the app name!");
  };

  $scope.serverAppNameChange = function() {
    AppServ.updateApp();
  };
  // Set up a watcher if we want to be updated by other things (like the server)
  $scope.$watch("app.title", $scope.appNameChange);

});

有人能告诉我为什么spyOn似乎没有拦截服务上的"query“函数调用吗？我已经看到了一些其他的答案，他们使用了$http和一些特殊的逻辑，但我只是想得到一个想法，我也可以拦截非http函数。

Answer 1

您不需要额外的mockBackend对象。只需监视服务本身。

beforeEach(inject(function($rootScope, $controller) {
  // We need to setup our controllers to use fake services provided by angular-mocks
  $scope = $rootScope.$new();

  $controller('AppInformationController', {
    $scope: $scope
  });
}));

it("should try to call the service, but we intercept it", inject(function(AppServ) {
  spyOn(AppServ, 'query').andReturn({'title':'Mock title'});

  $scope.serverAppNameChange();
  expect($scope.app.title).toBe("Mock title");
}));