def METHOD_NAME(self):
    a = TagFix_Vatin(None)
    a.init(None)
    assert not a.node(None, {"ref:vatin": "IT11111111115"})
    assert not a.way(None, {"ref:vatin": "IT11111111115"}, None)
    assert not a.relation(None, {"ref:vatin": "IT11111111115"}, None)
    assert not a.node(None, {"ref:vatin": "DE115055186"})
    # country code should be uppercase
    assert a.node(None, {"ref:vatin": "it11111111111"})
    # check digit is wrong
    assert a.node(None, {"ref:vatin": "IT11111111111"})
    # only digits allowed in Italy
    assert a.node(None, {"ref:vatin": "ITAAAAAAAAAAA"})
    # missing country code
    assert a.node(None, {"ref:vatin": "11111111115"})