'Test that attribute classes are correct (and not EarthLocation)'

def test_attribute_classes(self):

    assert (type(self.location.x) is u.Quantity)
    assert (type(self.location.y) is u.Quantity)
    assert (type(self.location.z) is u.Quantity)
    assert (type(self.location.lon) is Longitude)
    assert (type(self.location.lat) is Latitude)
    assert (type(self.location.height) is u.Quantity)
