// check if invalid id is accessed ..
public void is_idInValid_ReturnFalse()
{
// Arrange
BuildingController b = new BuildingController(ID);
// Act
// Assert
Assert.AreNotEqual(b.GetBuildingID(), "John");
}
// --> ( L1 R2 ) <--
// if buildingId is within the constraints -> get it..
public void is_idValid_ReturnId()
{
// Arrange
BuildingController b = new BuildingController(ID);
// Act
string id = b.GetBuildingID();
// Assert
Assert.AreEqual(ID, id);
}