public void WhenANewStudentrIsRegistered_TheNumberOfStudentsIncreasesBy1() { using (var db = new SchoolDBContext()) { var NumberOfStudentsPrior = db.Students.Count(); _student.RegisterStudent("Test", "TestS", "TestU", "TestP", date, "07898789890", "01232186781", "TestEmail", "TestStreet", "E10 3ju", "TestCity", 1000); var numberOfStudentsAfter = db.Students.Count(); Assert.AreEqual(NumberOfStudentsPrior + 1, numberOfStudentsAfter); } }