def METHOD_NAME(data_preparator, long_log_with_features, mapping):
    mapping.pop("timestamp")
    df = data_preparator.add_absent_log_cols(
        dataframe=long_log_with_features.drop("timestamp"),
        columns_mapping=mapping,
    )
    assert "timestamp" in df.columns
    assert isinstance(df.schema["timestamp"].dataType, TimestampType)