public void GetDataByTestTypeIdTest() { _repository .Setup(it => it.GetDataByTestTypeId(It.IsAny <Int32>())) .Returns <Int32>((testTypeId) => { return(_repositoryList.Where(x => x.TestTypeId == testTypeId).ToList()); }); var result = _target.GetDataByTestTypeId(testTypeIdValue).ToList(); Assert.AreEqual(_repositoryList.Where(x => x.TestTypeId == testTypeIdValue).ToList().Count, result.Count); }