public void AddDepartment() { Patient patient = new Patient(1, "username", "email", "password", "name", DateTime.Today, "phonenumber", true, Gender.Female, 23); Department department = new Department(1, "name", "description", true); Department department2 = new Department(2, "name", "description", true); patient.AddDepartment(department); patient.AddDepartment(department2); Assert.True(patient.Departments.Exists(d => d == department)); Assert.Equal(2, patient.Departments.Count); patient = new Patient(1, "username", "email", "name"); patient.AddDepartment(department); patient.AddDepartment(department2); Assert.True(patient.Departments.Exists(d => d == department)); Assert.Equal(2, patient.Departments.Count); }