def test_merge_exceptions():
    t = symbol('t', 'var * {x:int}')
    with pytest.raises(ValueError) as excinfo:
        merge(t, x=2*t.x)

    assert str(excinfo.value) in "Repeated columns"
dataset/ETHPy150Open blaze/blaze/blaze/expr/tests/test_collections.py/test_merge_exceptions/swapped operands of `in`