public void GetByInstitutionFalseInput()
        {
            EmptyLists();
            doctorRepository = new DoctorRepository(context);
            Exception ex = Assert.Throws <NullReferenceException>(() => doctorRepository.GetByInstitution(-1));

            Assert.Equal("Het instellingId is leeg.", ex.Message);
        }
 public void GetByInstitution()
 {
     EmptyLists();
     doctorRepository = new DoctorRepository(context);
     Assert.Equal(3, doctorRepository.GetByInstitution(1).Count);
 }