public void TestTimeToStartDays() { var startDate = new DateTime(2019, 1, 3); var assignedDate = new DateTime(2019, 1, 1); var repositoryMock = new Mock <IProjectRepository>(); var projectDomain = new ProjectDomain(repositoryMock.Object); var result = projectDomain.CalculateTimeToStart(startDate, assignedDate); Assert.AreEqual("2", result); }