def test_empty_contains(self):
        e = ast.Empty()
        v = ast.Literal('foo')
        cn = ast.ContainsOperator(e, v)
        c, r = optimizer.optimization_pass(cn)
        assert c == 1
        assert isinstance(r, ast.Constant)
        assert r.value == False
Retrieves a feed listing the tables in this spreadsheet.
dataset/ETHPy150Open armon/pypred/tests/unit/test_optimizer.py/TestOptimizer.test_empty_contains--crossover with--dataset/ETHPy150Open acil-bwh/SlicerCIP/Scripted/attic/PicasaSnap/gdata/spreadsheets/client.py/SpreadsheetsClient.get_tables