public void GetActiveDataByProjectIdTest() { _repository .Setup(it => it.GetActiveDataByProjectId(It.IsAny <Int32>())) .Returns <Int32>((projectId) => { return(_repositoryList.Where(x => x.ProjectId == projectId).ToList()); }); var result = _target.GetActiveDataByProjectId(projectIdValue).ToList(); Assert.AreEqual(_repositoryList.Where(x => x.ProjectId == projectIdValue).ToList().Count, result.Count); }