Question

我确定我所做的事情很容易解决，但我似乎无法发现它。测试中的功能是：

function signIn(credentials) {
  return $http({
    url: 'auth/authenticate',
    skipAuthorization: true,
    method: 'POST',
    data: credentials
  }).then(function (result) {
    saveCredentials(result.data);
  });
};

在$ http的承诺返回后调用 saveCredentials 函数。我正在测试它：

(function() {
describe('Unit Testing: Auth-service Factory',function() {

    var AuthService, httpBackend, deferred;
    beforeEach(module('flowlens'));

    // Mock values for jwt and store
    beforeEach(function() {
        module(function($provide) {
            $provide.value('jwtHelper',{
                decodeToken: function() {
                    return {
                        contact: 'Joe Bloggs'
                    }
                }
            });
            $provide.value('store',{
                set: function() {}
            });
        });
    });

    // Get the service
    beforeEach(function() {
        inject(function(_AuthService_, _$httpBackend_) {
            AuthService = _AuthService_;
            httpBackend = _$httpBackend_;
        });
    });

    describe('should load the service',function() {
        it('service should be loaded',function() {
            expect(AuthService).not.toBeUndefined();
        });
    });

    describe('signIn',function() {
        it('should return data when calling signIn', function() {
            spyOn(AuthService,'saveCredentials');

            httpBackend.expectPOST('auth/authenticate').respond({msg: 'Success'});
            AuthService.signIn();
            httpBackend.flush();

            expect(AuthService.saveCredentials).toHaveBeenCalled();
        });
    });
});
}());

预计刚好在这条线上方的失败：

Expected spy saveCredentials to have been called

为什么没有被召唤？我在函数中添加了一条日志消息，我可以看到它在代码中被调用 - 这是$ scope.digest问题吗？请注意，如果我添加以下内容：

it('should return data when calling signIn', function() {
            spyOn(AuthService,'saveCredentials');

            httpBackend.expectPOST('auth/authenticate').respond({msg: 'Success'});
            AuthService.signIn().then(function(result) {
                AuthService.saveCredentials(result);
                // Assuming that I have mocked it before the call
            });
            httpBackend.flush();

            expect(AuthService.saveCredentials).toHaveBeenCalled();
        });

它会通过。但这是一个假测试，因为我可以继续将实际调用更改为完全不同的方法，它仍然会通过。

我做错了什么？

Answer 1

您可以在then(...)函数中尝试您的期望：

it('should return data when calling signIn', function() {
    spyOn(AuthService,'saveCredentials');

    httpBackend.expectPOST('auth/authenticate').respond({msg: 'Success'});

    AuthService.signIn().then(function(result) {
        expect(AuthService.saveCredentials).toHaveBeenCalled();
    });

    httpBackend.flush();        
});

调用预期函数不被调用

1 个答案: