SimpleMock 1.0.4

SimpleMock

SimpleMock is a very simple mocking framework, something that I have always wanted to try to write but I was prompted to have a go after a discussion at work.

Usage

The examples below use the following interface as an example

public interface IWorker
{
    int DoSomething(int anInt, string aString, bool aBool);
    string DoSomethingStringy(int anInt);
    int Height { get; }
}

Creating the Mock

var workerMock = new Mock<IWorker>();

Mocking a Method

workerMock
    .Setup(w => w.DoSomething(0, "", false))
    .Returns(5);

The following two code blocks will return 5 for method calls that passed an empty string for the second parameter regardless of the values of the other two parameters.

workerMock
    .Setup(w => w.DoSomething(It.IsAny<int>(), "", It.IsAny<bool>()))
    .Returns(5);

workerMock
    .Setup(w => w.DoSomething(It.IsAny<int>(), It.Affirms<string>(s => s == ""), It.IsAny<bool>()))
    .Returns(5);

Mocking a Readable Property

workerMock
    .Setup(w => w.Height)
    .Returns(10);

Supplying the Mock to a Dependant

var dependant = new Dependant(workerMock.MockObject);

Getting the Call Count

workerMock.GetCallCount(w => w.DoSomething(0, "", false));

The following code will only match method calls that passed an empty string for the second parameter regardless of the values of the other two parameters.

workerMock.GetCallCount(w => w.DoSomething(It.IsAny<int>(), "", It.IsAny<bool>()));

Getting the Parameter Values of a Specific Call

workerMock.GetCallParameters(w => w.DoSomething(0, "", false), 7);

N.B. The index is zero-based.

The following code will only match method calls that passed 59 for the first parameter regardless of the values of the other two parameters.

workerMock.GetCallParameters(w => w.DoSomething(59, It.IsAny<string>(), It.IsAny<bool>()), 2);

Getting the Count of Set Operations on a Read/Write Property

workerMock.GetSetCallCount(w => w.Height, () => It.IsAny<int>());

Getting the Parameter Values of Set Operations on a Read/Write Property

workerMock.GetSetCallParameters(w => w.Height, () => It.Affirms<int>(h => h < 10), 7);

N.B. The index is zero-based.

Limitations

This is only a very simple and niave implementation so there are a number of limitations, amongst which are:

• No support for set only parameters
  • This is much harder to implement. It involves decompiling and intepretring a call to the set code as a set property call is not a legal expression that can be interpreted as an expression tree.
• Can only mock interfaces
• No support for callbacks