public void can_assign_teacher() { TeacherGateway teacherGateway = new TeacherGateway(TestHelpers.ConnectionString); string firstName = TestHelpers.RandomTestName(); string lastName = TestHelpers.RandomTestName(); teacherGateway.Create(firstName, lastName); Teacher teacher1 = teacherGateway.FindByName(firstName, lastName); ClassGateway sut = new ClassGateway(TestHelpers.ConnectionString); string name = TestHelpers.RandomTestName(); string level = TestHelpers.RandomLevel(); sut.Create(name, level, teacher1.TeacherId); Class c; { c = sut.FindByName(name); CheckClass(c, name, level, teacher1.TeacherId); } { string firstName2 = TestHelpers.RandomTestName(); string lastName2 = TestHelpers.RandomTestName(); teacherGateway.Create(firstName2, lastName2); Teacher teacher2 = teacherGateway.FindByName(firstName2, lastName2); sut.AssignTeacher(c.ClassId, teacher2.TeacherId); c = sut.FindById(c.ClassId); CheckClass(c, name, level, teacher2.TeacherId); sut.AssignTeacher(c.ClassId, 0); c = sut.FindById(c.ClassId); CheckClass(c, name, level, 0); teacherGateway.Delete(teacher2.TeacherId); } sut.Delete(c.ClassId); teacherGateway.Delete(teacher1.TeacherId); }