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pub mod compression_provider;
pub mod lz13;

pub use compression_provider::CompressionProvider;
pub use lz13::LZ13CompressionProvider;

#[cfg(test)]
mod test {
    use super::*;
    use std::fs::OpenOptions;
    use std::io::Read;
    use std::path::PathBuf;
    
    #[test]
    fn lz13_decompress_success() {
        let compressed = load_test_file("LZ13Test.bin.lz");
        let decompressed = load_test_file("LZ13Test.bin");
        let lz13 = LZ13CompressionProvider{};
        let actual_decompressed = lz13.decompress(&compressed);
        assert!(actual_decompressed.is_ok());
        assert_eq!(actual_decompressed.unwrap(), decompressed);
    }

    #[test]
    fn lz13_compress_success() {
        let compressed = load_test_file("LZ13Test.bin.lz");
        let decompressed = load_test_file("LZ13Test.bin");
        let lz13 = LZ13CompressionProvider{};
        let actual_compressed = lz13.compress(&decompressed);
        assert!(actual_compressed.is_ok());
        assert_eq!(actual_compressed.unwrap(), compressed);
    }

    fn load_test_file(name: &str) -> Vec<u8> {
        let mut test_file_path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
        test_file_path.push("resources/test/");
        test_file_path.push(name);
        let mut file = OpenOptions::new().read(true).open(test_file_path).unwrap();
        let mut file_contents: Vec<u8> = Vec::new();
        file.read_to_end(&mut file_contents).unwrap();
        file_contents
    }
}