How to write Mock case for Unit Test

Question

**I want to write the Mock for the unit test code in MVC5 but little bit confuse in writing that code.

Here is the Function definition:**

public List<CommentsCountInfoResult> GetCommentsCountInfo(int notebookId, int notebookEntryId)

{

return _entities.GetCommentsCountInfo(notebookId,notebookEntryId).ToList();

}

Here is the test case:

[Test]

public void GetCommentsCountInfoTest()

{

var result =_service.GetCommentsCountInfo(1, 1);

//listValue.Setup(m => m.GetCommentsCountInfo(1,1));

var expected = result.Count();

Assert.AreEqual(0, expected);

}