Mocking objects without no-argument constructor in C# / .NET

Sure thing. In this example i’ll use Moq, a really awesome mocking library.


public class MyObject
     public MyObject(object A, object B, object C)
          // Assign your dependencies to whatever

Mock<MyObject> mockObject = new Mock<MyObject>();
Mock<MyObject> mockObject = new Mock<MyObject>(null, null, null); // Pass Nulls to specific constructor arguments, or 0 if int, etc

In many cases though, I assign Mock objects as the arguments so I can test the dependencies:

Mock<Something> x = new Mock<Something>();
MyObject mockObject = new MyObject(x.Object);

x.Setup(d => d.DoSomething()).Returns(new SomethingElse());


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