#[cfg(test)]
mod test{
    use std::path::PathBuf;
    use csv_challenge_ex::{
        write_csv,
        load_csv,
        replace_column,
    };
    #[test]
    fn test_csv_challenge() {
        let filename=PathBuf::from(
            r"F:\Rust_Practise\csv_challenge\src\input\challenge.csv"
        );
        let csv_data=load_csv(filename);
        assert!(csv_data.is_ok());
        let modified_data=replace_column(csv_data.unwrap(),"City","London");
        assert!(modified_data.is_ok());
        let output_file=write_csv(
            &modified_data.unwrap(),
            r"F:\Rust_Practise\csv_challenge\src\output\integratiton_test.csv"
        );
        assert!(output_file.is_ok());
    }
}