sp3 1.4.1

IGS SP3 file parser
Documentation 
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//! SP3 merging opreations

#[cfg(test)]
mod test {
    use crate::prelude::*;
    use qc_traits::Merge;
    use std::path::PathBuf;
    use std::str::FromStr;

    #[test]
    #[cfg(feature = "qc")]
    #[cfg(feature = "flate2")]
    fn merge_failure() {
        let test_pool = PathBuf::new()
            .join(env!("CARGO_MANIFEST_DIR"))
            .join("data/SP3")
            .join("C");

        let path_a = test_pool
            .clone()
            .join("EMR0OPSULT_20232391800_02D_15M_ORB.SP3.gz");

        let file_a = SP3::from_gzip_file(&path_a);
        let file_a = file_a.unwrap();

        let path_b = test_pool
            .clone()
            .join("ESA0OPSULT_20232320600_02D_15M_ORB.SP3.gz");

        let file_b = SP3::from_gzip_file(&path_b);
        let file_b = file_b.unwrap();

        let new = file_a.merge(&file_b);

        assert!(
            new.is_err(),
            "should not be able to merge files from two different data providers"
        );
    }

    #[test]
    #[cfg(feature = "qc")]
    #[cfg(feature = "flate2")]
    fn esa0opsrap_esa0opsult_2023() {
        let test_pool = PathBuf::new()
            .join(env!("CARGO_MANIFEST_DIR"))
            .join("data/SP3")
            .join("C");

        let path_a = test_pool
            .clone()
            .join("ESA0OPSRAP_20232390000_01D_15M_ORB.SP3.gz");

        let file_a = SP3::from_gzip_file(&path_a).unwrap();

        let path_b = test_pool
            .clone()
            .join("ESA0OPSULT_20232320600_02D_15M_ORB.SP3.gz");

        let file_b = SP3::from_gzip_file(&path_b).unwrap();

        let merged = file_a.merge(&file_b);

        assert!(
            merged.is_ok(),
            "failed to merge into ESA0OPSULT_20232320600 ESA0OPSRAP_20232390000, {:?}",
            merged.err()
        );

        let merged = merged.unwrap();
        assert_eq!(merged.total_epochs(), 192 + 96);

        assert_eq!(
            merged.first_epoch().unwrap(),
            Epoch::from_str("2023-08-20T06:00:00 GPST").unwrap()
        );

        // TODO
        // assert_eq!(
        //     merged.last_epoch(),
        //     Some(Epoch::from_str("2023-08-27T23:45:00 GPST").unwrap())
        // );
    }
}