public void GetAllAssignmentsShouldReturnOkObjectResult()
{
_internshipAssignmentMock.Setup(_ia => _ia.GetAllInternshipAssignments())
.Returns(GetAllAssignmentList);
var assignments = _assignmentsController.GetAllInternshipAssignments();
Assert.NotNull(assignments);
Assert.AreEqual(assignments.GetType(), typeof(OkObjectResult));
}