无法执行模拟设置

Question

I am trying to make use of nunit together with to do unit testing. However I am experiencing this error:

Moq.MockException: The following setups were not matched: User m => m.encrptPassword(It.IsAny<String>(), It.IsAny<String>())

The following is the snippet of my code that is having issues:

private User _User;
Mock<User> mockUser;

[SetUp]
public void init()
{
    mockUser = new Mock<User>();
    _User = new User();
}

[Test]
[TestCase("1","admin","??????_????k0O???qr#??%szq??` ?j???????D>?????????Lvz??BP")]
public void encryptPasswordTest(string userID, string password, string output)
{

    mockUser.Setup(m => m.encryptPassword(It.IsAny<string>(), It.IsAny<string>())).Returns(() => output);
    string result = _User.encryptPassword(userID, password);
    Assert.That(result.Equals(output));

    mockUser.VerifyAll();
}

The following is the method that I am trying to mock

public virtual string encryptPassword(string userID, string password) {
    string hashed = "";
    HashAlgorithm sha256 = new SHA256CryptoServiceProvider();
    string salted = userID + password;
    byte[] result = sha256.ComputeHash(Encoding.ASCII.GetBytes(salted));
    hashed = Encoding.ASCII.GetString(result);
    return hashed;
}

Answer 1

You don't need any mocking in your case, you just have to check functions output:

[Test]
[TestCase("1","admin","??????_????k0O???qr#??%szq??` ?j???????D>?????????Lvz??BP")]
public void encryptPasswordTest(string userID, string password, string output)
{ 
    string result = _User.encryptPassword(userID, password);
    Assert.That(result.Equals(output));
}

You would need mocking if you'd need to validate your logic depending on output of another component. Eg you have

public interface IEncrypter
{
    string encryptPassword(string userID, string password);
}

and inject it to User class:

public User(IEncrypter encrypter) { this.encrypter = encrypter; }

Then you would mock it:

var mock = new Mock<IEncrypter>();
mock.Setup(m => m.encryptPassword(It.IsAny<string>(), It.IsAny<string>())).Returns(() => output);
var user = new User(mock.Object);