Trying to Mock static class weird behaviour

[Javier]

Hi, 

I am trying to Mock a static method from a class that is static too,

This static method calls another statics method of the same class,

example:

public static string MethodStaticA()
{

    return MethodStaticB();
}
public static string MethodStaticB()
{
    //Make something
}

For some reason when I try to Mock method A like this:

Mock.SetupStatic(typeof(MfsUtils));

Mock.Arrange(() => MfsUtils.MethodStaticA()).Returns("MyString");

I can see in the logs that actually is calling to MethodStaticB() and I do not want to call it

How can we properly  mock this??

[Kaloyan]

Hi Javier,

Thank you for contacting us.

I tried the following:

public static class MfsUtils
{
    public static string MethodStaticA()
    {
        return MethodStaticB();
    }
    public static string MethodStaticB()
    {
        throw new NotImplementedException();
    }
}

 and the test:

[TestMethod]
public void TestMethod1()
{
    // Arrange
    Mock.SetupStatic(typeof(MfsUtils), Behavior.CallOriginal);

    Mock.Arrange(() => MfsUtils.MethodStaticA()).Returns("MyString");

    // Act
    var actual = MfsUtils.MethodStaticA();

    // Assert
    Assert.AreEqual("MyString", actual);
}

On my side, this does not throw a NotImplementedException(). Further, I also used Behavior.Strict in the Mock.SetupStatic and again the test didn't throw StrictMockException for non arranged call to the MethodStaticB(). Another thing i tried was to assert the occurrences of the MethodStaticB method, with:
Mock.Assert(() => MfsUtils.MethodStaticB(), Occurs.Never()); -> this passed.
Finally, I completely dropped the Mock.SetupStatic and again I was not able to reproduce the issue.

Can you please, send us the logs you mentioned in your ticket for further investigation? Also, providing your project may help a lot. You should be able to attach an archive of it to your next reply.

Thank you for the help in advance.

Regards,
Kaloyan
Telerik