How to use test_check_types_error_output method in pandera

Best Python code snippet using pandera_python

test_decorators.py

Source:test_decorators.py

...439        transform(df)440    except errors.SchemaError as exc:441        assert exc.schema == InSchema.to_schema()442        assert exc.data.equals(df)443def test_check_types_error_output() -> None:444    """Test that check_types raises an error when the output is not correct."""445    df = pd.DataFrame({"a": [1]}, index=["1"])446    @check_types447    def transform_derived(448        df: DataFrame[InSchema],449    ) -> DataFrame[DerivedOutSchema]:450        return df451    with pytest.raises(452        errors.SchemaError, match="column 'b' not in dataframe"453    ):454        transform_derived(df)455    try:456        transform_derived(df)457    except errors.SchemaError as exc:...

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