Method test_unknown_symbol

test/python/test_ElementMap.py:46–48

(self, em1)

        with pytest.raises(IndexError):
            em1[4]
    def test_unknown_symbol(self, em1):
        with pytest.raises(ArithmeticError):
            em1["XY"]
    def test_wrong_argument_type(self, em1):
        with pytest.raises(NotImplementedError):
            em1[1.23]