1 use flate2::read::GzDecoder;
2 use flate2::read::MultiGzDecoder;
3 use std::fs::File;
4 use std::io::prelude::*;
5 use std::io::{self, BufReader};
6 use std::path::Path;
7 
8 // test extraction of a gzipped file
9 #[test]
test_extract_success()10 fn test_extract_success() {
11     let content = extract_file(Path::new("tests/good-file.gz")).unwrap();
12     let mut expected = Vec::new();
13     File::open("tests/good-file.txt")
14         .unwrap()
15         .read_to_end(&mut expected)
16         .unwrap();
17     assert_eq!(content, expected);
18 }
19 //
20 // test partial extraction of a multistream gzipped file
21 #[test]
test_extract_success_partial_multi()22 fn test_extract_success_partial_multi() {
23     let content = extract_file(Path::new("tests/multi.gz")).unwrap();
24     let mut expected = String::new();
25     BufReader::new(File::open("tests/multi.txt").unwrap())
26         .read_line(&mut expected)
27         .unwrap();
28     assert_eq!(content, expected.as_bytes());
29 }
30 
31 // test extraction fails on a corrupt file
32 #[test]
test_extract_failure()33 fn test_extract_failure() {
34     let result = extract_file(Path::new("tests/corrupt-gz-file.bin"));
35     assert_eq!(result.err().unwrap().kind(), io::ErrorKind::InvalidInput);
36 }
37 
38 //test complete extraction of a multistream gzipped file
39 #[test]
test_extract_success_multi()40 fn test_extract_success_multi() {
41     let content = extract_file_multi(Path::new("tests/multi.gz")).unwrap();
42     let mut expected = Vec::new();
43     File::open("tests/multi.txt")
44         .unwrap()
45         .read_to_end(&mut expected)
46         .unwrap();
47     assert_eq!(content, expected);
48 }
49 
50 // Tries to extract path into memory (assuming a .gz file).
extract_file(path_compressed: &Path) -> io::Result<Vec<u8>>51 fn extract_file(path_compressed: &Path) -> io::Result<Vec<u8>> {
52     let mut v = Vec::new();
53     let f = File::open(path_compressed)?;
54     GzDecoder::new(f).read_to_end(&mut v)?;
55     Ok(v)
56 }
57 
58 // Tries to extract path into memory (decompressing all members in case
59 // of a multi member .gz file).
extract_file_multi(path_compressed: &Path) -> io::Result<Vec<u8>>60 fn extract_file_multi(path_compressed: &Path) -> io::Result<Vec<u8>> {
61     let mut v = Vec::new();
62     let f = File::open(path_compressed)?;
63     MultiGzDecoder::new(f).read_to_end(&mut v)?;
64     Ok(v)
65 }
66 
67 #[test]
empty_error_once()68 fn empty_error_once() {
69     let data: &[u8] = &[];
70     let cbjson = GzDecoder::new(data);
71     let reader = BufReader::new(cbjson);
72     let mut stream = reader.lines();
73     assert!(stream.next().unwrap().is_err());
74     assert!(stream.next().is_none());
75 }
76