How to use test_head_dataframe_schema method in pandera

Best Python code snippet using pandera_python

test_schemas.py

Source:test_schemas.py

...541        with pytest.raises(errors.SchemaError):542            schema(data)543        return544    schema(data)545def test_head_dataframe_schema() -> None:546    """Test that schema can validate head of dataframe, returns entire547    dataframe."""548    df = pd.DataFrame(549        {"col1": list(range(0, 100)) + list(range(-1, -1001, -1))}550    )551    schema = DataFrameSchema(552        columns={"col1": Column(int, Check(lambda s: s >= 0))}553    )554    # Validating with head of 100 should pass555    assert schema.validate(df, head=100).equals(df)556    with pytest.raises(errors.SchemaError):557        schema.validate(df)558def test_tail_dataframe_schema() -> None:559    """Checks that validating the tail of a dataframe validates correctly."""...

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