OCMock和块测试,执行

Question

这是测试中的方法:

- (void)loginWithUser:(NSString *)userName andPass:(NSString *)pass {

    NSDictionary *userPassD = @{@"user":userName,
                                @"pass":pass};
    [_loginCntrl loginWithUserPass:userPassD withSuccess:^(NSString *authToken){
        // save authToken to credential store
    } failure:^(NSString *errorMessage) {
        // alert user pass was wrong
    }];    
}

我要测试的是,在该成功块中,使用适当的方法调用其他依赖项/ OCMockObject _credStore.所以目前loginCtrl和credStore依赖是OCMockObjects,我可以存根/期望这些.

在调用时,我会将loginController以某种方式执行该块吗？我已经看过一些关于使用OCMock来阻塞块的问题,我无法理解他们正在做的事情以及是否适合这种情况.

实际上我想做的就是OCMock来激活块([成功调用] ??),这样代码_credStore saveUserPass就完成了,可以在_credStore上验证.

我停在哪里:

- (void)test_loginWithuserPass_succeeds_should_call_credStore_setAuthToken {

    NSDictionary *userPassD = @{@"user":@"mark",
                                @"pass":@"test"};
    id successBlock = ^ {
        // ??? isn't this done in the SUT?
    };

    [[[_loginController stub] andDo:successBlock] loginWithUserPass:userPassD withSuccess:OCMOCK_ANY failure:OCMOCK_ANY];
    [[_credentialStore expect] setAuthToken:@"passed back value from block"];
    [_docServiceSUT loginWithUser:@"mark" andPass:@"test"];
    [_credentialStore verify];
}

ETA:这是我基于Ben的下面的示例,但没有工作,获得EXC_BAD_ACCESS异常:

// OCUnit test method
- (void)test_loginWithUserPass_success_block_should_call_credentials_setAuthToken {

    void (^proxyBlock)(NSInvocation*) = ^(NSInvocation *invocation) {
        void(^successBlock)(NSString *authToken);
        [invocation getArgument:&successBlock atIndex:3]; // should be 3 because my block is the second param
        successBlock(@"myAuthToken");
    };

    [[[_loginController expect] andDo:proxyBlock] loginWithUserPass:OCMOCK_ANY withSuccess:OCMOCK_ANY failure:OCMOCK_ANY];
    [[_credentialStore expect] setAuthToken:@"myAuthToken"];
    [_docServiceSUT loginWithUser:@"mark" andPass:@"myPass"];
    [_loginController verify];
    [_credentialStore verify];
}

//method under test
- (void)loginWithUser:(NSString *)userName andPass:(NSString *)pass {

    NSDictionary *userPassD = @{@"user":userName,
                                @"pass":pass};

    void(^onSuccess)(NSString *) = ^(NSString *authToken){

        [SVProgressHUD dismiss];
        [_credentials setAuthToken:authToken];

        // Ask user to enter the 6 digit authenticator key
        [self askUserForAuthenticatorKey];
    };

    void(^onFailure)(NSString *) = ^(NSString *errorMessage) {

        [SVProgressHUD dismiss];
        [_alertSender sendAlertWithMessage:errorMessage andTitle:@"Login failed"];
    };

    [SVProgressHUD show];
    [_loginCntrl loginWithUserPass:userPassD withSuccess:onSuccess
      failure:onFailure];
}

Answer 1

如果我跟着你,这可能会做你想要的:

@interface ExampleLC : NSObject
- (void)loginWithUserPass:userPassD withSuccess:(void (^)(NSString *authToken))successBlock failure:(void (^)(NSString *errorMessage))failureBlock;
@end
@implementation ExampleLC
- (void)loginWithUserPass:userPassD withSuccess:(void (^)(NSString *authToken))successBlock failure:(void (^)(NSString *errorMessage))failureBlock
{
}
@end
@interface Example : NSObject {
    @public
    ExampleLC *_loginCntrl;
}
- (void)saveToken:(NSString *)authToken;
- (void)loginWithUser:(NSString *)userName andPass:(NSString *)pass;
@end
@implementation Example
- (void)saveToken:(NSString *)authToken
{
}
- (void)loginWithUser:(NSString *)userName andPass:(NSString *)pass {

    NSDictionary *userPassD = @{@"user":userName,
                                @"pass":pass};
    [_loginCntrl loginWithUserPass:userPassD withSuccess:^(NSString *authToken){
        // save authToken to credential store
        [self saveToken:authToken];
    } failure:^(NSString *errorMessage) {
        // alert user pass was wrong
    }];
}
@end


@interface loginTest : SenTestCase

@end

@implementation loginTest

- (void)testExample
{
    Example *exampleOrig = [[Example alloc] init];
    id loginCntrl = [OCMockObject mockForClass:[ExampleLC class]];
    [[[loginCntrl expect] andDo:^(NSInvocation *invocation) {
        void (^successBlock)(NSString *authToken) = [invocation getArgumentAtIndexAsObject:3];
        successBlock(@"Dummy");
    }] loginWithUserPass:OCMOCK_ANY withSuccess:OCMOCK_ANY failure:OCMOCK_ANY];
    exampleOrig->_loginCntrl = loginCntrl;
    id example = [OCMockObject partialMockForObject:exampleOrig];
    [[example expect] saveToken:@"Dummy"];
    [example loginWithUser:@"ABC" andPass:@"DEF"];
    [loginCntrl verify];
    [example verify];
}
@end

此代码允许强制使用您指定的参数调用实际成功块,然后您可以验证该参数.

Answer 2

我正在使用的代码很大程度上基于块,所以我对你的问题非常熟悉.

只是为了重新解释一下问题:

- (ReturnObject *)methodThatWeWantToTest:(Foobar *)bar
{    
       [self.somethingElse doSomethingAndCallBlock:^{
         // really want to test this code
       } secondBock:^{
        // even more code to test
       }];
}

为了解决你在这里提出的完全相同的问题,我们创建了单元测试助手类,它具有与调用我们需要测试的块的方法具有相同签名的方法.

对于代码示例,它是一个不返回任何内容的模拟方法,需要一个id参数和两个块.

下面是您需要的模拟方法示例以及使用的OCMock单元测试示例

- (void)mockSuccessBlockWithOneArgumentTwoBlocks:(id)firstArgument
                                    successBlock:(void (^)(NSString *authtoken))successBlock
                                    failureBlock:(void (^)(NSString *errorMessage))failureBlock    
{
    successBlock(@"mocked unit test auth token");
}

- (void)testLoginWithUserCallsSomethingInCredStoreOnLoginSuccess
{
    LoginService *loginService = [[LoginService alloc] init];

    // init mocks we need for this test
    id credStoreMock = [OCMockObject niceMockForClass:[MyCredStore class]];
    id loginCtrlMock = [OCMockObject niceMockForClass:[MyLoginCtrl class]];

    // force login controller to call success block when called with loginWithUserPass
    // onObject:self - if mock method is in the same unit test, use self. if it is helper object, point to the helper object.
    [[[loginCtrlMock stub] andCall:@selector(mockSuccessBlockWithOneArgumentTwoBlocks:successBlock:failureBlock::) onObject:self] loginWithUserPass:OCMOCK_ANY withSuccess:OCMOCK_ANY failure:OCMOCK_ANY];

    // setup mocks
    loginService.credStore = credStoreMock;
    loginService.loginCtrl = loginCtrlMock;

    // expect/run/verify
    [[credStore expect] callSomethingFromSuccessBlock];
    [loginService loginWithUser:@"testUser" andPass:@"testPass"];
    [credStore verify];
}

希望能帮助到你!如果您有任何问题,请告诉我们,我们已经开始工作了.