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);
}