Test your AI Agents with the all-new Agent to Agent Testing Platform.Learn More

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."""...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.