C
C#•4w ago
Zee

unit testing problem with ICache

so I am getting this error 
    System.NotSupportedException : Unsupported expression: cache => cache.TryGetValue<Customer>("pendingCustomer", testCustomer)
Extension methods (here: CacheExtensions.TryGetValue) may not be used in setup / verification expressions.
    System.NotSupportedException : Unsupported expression: cache => cache.TryGetValue<Customer>("pendingCustomer", testCustomer)
Extension methods (here: CacheExtensions.TryGetValue) may not be used in setup / verification expressions.
for this method 
 [Fact]
 public async Task VerifyEmailAndCreateAccount_ValidCode_CreatesCustomerAccount()
 {

     // Arrange

     var testCustomer = _testCustomer;
     string verificationCode = "123456";

     var emailVerification = new EmailVerification
     {
         Email = testCustomer.Email,
         Code = "123456" 
     };

     // Setup the cache mock to return a valid customer and verification code
     _mockMemoryCache.Setup(cache => cache.TryGetValue("pendingCustomer", out testCustomer))
         .Returns(true);
     _mockMemoryCache.Setup(cache => cache.TryGetValue("verificationCode", out verificationCode))
         .Returns(true);

     // Act: Call the API method
     var result = await _controller.VerifyEmailAndCreateAccount(emailVerification);

     // Assert
     var okResult = Assert.IsType<OkObjectResult>(result);
     Assert.Equal("Email successfully verified and account created.", okResult.Value);
 }
 [Fact]
 public async Task VerifyEmailAndCreateAccount_ValidCode_CreatesCustomerAccount()
 {

     // Arrange

     var testCustomer = _testCustomer;
     string verificationCode = "123456";

     var emailVerification = new EmailVerification
     {
         Email = testCustomer.Email,
         Code = "123456" 
     };

     // Setup the cache mock to return a valid customer and verification code
     _mockMemoryCache.Setup(cache => cache.TryGetValue("pendingCustomer", out testCustomer))
         .Returns(true);
     _mockMemoryCache.Setup(cache => cache.TryGetValue("verificationCode", out verificationCode))
         .Returns(true);

     // Act: Call the API method
     var result = await _controller.VerifyEmailAndCreateAccount(emailVerification);

     // Assert
     var okResult = Assert.IsType<OkObjectResult>(result);
     Assert.Equal("Email successfully verified and account created.", okResult.Value);
 }
can anyone help how to fix this please?
No description
2 Replies
whatsinaname
whatsinaname•4w ago
It.IsAny<Customer> something like this u may have to define in the mock setup
becquerel
becquerel•4w ago
extension methods are static methods, and static methods can't be mocked. only interface or virtual methods can be intercepted/mocked you would need to look at the implementation of CacheExtensions.TryGetValue to see what 'real' code in IMemoryCache it's relying on and then mock those out alternatively, couldn't you just make a real memorycache for your test? by definition it's in-memory, so there shouldn't be any issues in creating and destroying one per test...

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