use flate2::read::GzDecoder; use flate2::read::MultiGzDecoder; use std::fs::File; use std::io::prelude::*; use std::io::{self, BufReader}; use std::path::Path; // test extraction of a gzipped file #[test] fn test_extract_success() { let content = extract_file(Path::new("tests/good-file.gz")).unwrap(); let mut expected = Vec::new(); File::open("tests/good-file.txt") .unwrap() .read_to_end(&mut expected) .unwrap(); assert_eq!(content, expected); } // // test partial extraction of a multistream gzipped file #[test] fn test_extract_success_partial_multi() { let content = extract_file(Path::new("tests/multi.gz")).unwrap(); let mut expected = String::new(); BufReader::new(File::open("tests/multi.txt").unwrap()) .read_line(&mut expected) .unwrap(); assert_eq!(content, expected.as_bytes()); } // test extraction fails on a corrupt file #[test] fn test_extract_failure() { let result = extract_file(Path::new("tests/corrupt-gz-file.bin")); assert_eq!(result.err().unwrap().kind(), io::ErrorKind::InvalidInput); } //test complete extraction of a multistream gzipped file #[test] fn test_extract_success_multi() { let content = extract_file_multi(Path::new("tests/multi.gz")).unwrap(); let mut expected = Vec::new(); File::open("tests/multi.txt") .unwrap() .read_to_end(&mut expected) .unwrap(); assert_eq!(content, expected); } // Tries to extract path into memory (assuming a .gz file). fn extract_file(path_compressed: &Path) -> io::Result> { let mut v = Vec::new(); let f = File::open(path_compressed)?; GzDecoder::new(f).read_to_end(&mut v)?; Ok(v) } // Tries to extract path into memory (decompressing all members in case // of a multi member .gz file). fn extract_file_multi(path_compressed: &Path) -> io::Result> { let mut v = Vec::new(); let f = File::open(path_compressed)?; MultiGzDecoder::new(f).read_to_end(&mut v)?; Ok(v) } #[test] fn empty_error_once() { let data: &[u8] = &[]; let cbjson = GzDecoder::new(data); let reader = BufReader::new(cbjson); let mut stream = reader.lines(); assert!(stream.next().unwrap().is_err()); assert!(stream.next().is_none()); }