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How to use test_check_types_unchanged method in pandera

Best Python code snippet using pandera_python

test_decorators.py

Source:test_decorators.py

...383    ) -> DataFrame[OnlyZeroesSchema]:384        return pd.DataFrame({"a": [1, 1]})385    with pytest.raises(errors.SchemaErrors, match="Usage Tip"):386        transform_lazy(df)387def test_check_types_unchanged() -> None:388    """Test the check_types behaviour when the dataframe is unchanged within the389    function being checked."""390    @check_types391    def transform(392        df: DataFrame[OnlyZeroesSchema],393        notused: int,  # pylint: disable=unused-argument394    ) -> DataFrame[OnlyZeroesSchema]:395        return df396    df = pd.DataFrame({"a": [0]})397    pd.testing.assert_frame_equal(transform(df, 2), df)398# required to be globals:399# see https://pydantic-docs.helpmanual.io/usage/postponed_annotations/400class InSchema(SchemaModel):  # pylint:disable=too-few-public-methods401    """Test schema used as input."""...

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