private IActionResult GetAssignmentById(int id) { var assignmentModel = SetupAssignmentsModel(id); var environments = new List <Environment>(); var environment = new Environment() { EnvironmentName = "Java", Id = 1, InternshipAssignment = new InternshipAssignment(), InternshipAssignmentId = id }; environments.Add(environment); _internshipAssignmentMock.Setup(_internshipAssignmentMock => _internshipAssignmentMock.GetInternshipAssignmentById(It.IsAny <int>())) .Returns(new InternshipAssignment() { AmountOfInterns = 2, AmountOfSupportingEmployees = 50, Company = new Company(), CompanyId = 1, Conditions = "condition", DateCreated = DateTime.Now, Description = "description", Environments = new List <Environment>(environments), ExtraDescriptionEnvironments = "extra description", Id = id, Specialization = Specialization.AiAndRobotics, SpecificStudentFirstAndLastName = "Last first", Status = Status.Behandeling, TeacherStatus = TeacherStatus.Behandeling, ResearchTheme = "test", Location = new Address(), OtherComments = "", InternshipPeriod = InternshipPeriod.Semester1, IntroductionConditions = new List <IntroductionCondition>() }); return(_assignmentsController.GetInternshipAssignmentById(assignmentModel)); }