public void TestDoctorList(bool active, int doctorId, string name, string surname, int officeNumber) { SqlCalendar sql = new SqlCalendar(); IEnumerable <ClassDoctor> query = from elem in sql.DoctorList() where elem.Active == active && elem.Doctor_id == doctorId && elem.Name == name && elem.Surname == surname && elem.OfficeNumber == officeNumber select elem; Assert.Single(query); }