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| author | Amos Onn <amosonn@gmail.com> | 2017-02-16 02:16:41 +0100 |
|---|---|---|
| committer | Amos Onn <amosonn@gmail.com> | 2017-02-16 02:16:41 +0100 |
| commit | ab57e7b86817b8ca9b7e6afb2f689ae67274ec7c (patch) | |
| tree | 86ef955a3a898f351043d6c5cde0bb4bed8506e0 | |
| parent | a797b6e2feb1c6cd60868a2d3b59029a0ca5df64 (diff) | |
| download | rust-ab57e7b86817b8ca9b7e6afb2f689ae67274ec7c.tar.gz rust-ab57e7b86817b8ca9b7e6afb2f689ae67274ec7c.zip | |
std::io::cursor Added test for seeking beyond i64.
| -rw-r--r-- | src/libstd/io/cursor.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/libstd/io/cursor.rs b/src/libstd/io/cursor.rs index 0cff8661d88..9427e4afa21 100644 --- a/src/libstd/io/cursor.rs +++ b/src/libstd/io/cursor.rs @@ -527,6 +527,43 @@ mod tests { } #[test] + fn seek_past_i64() { + let buf = [0xff]; + let mut r = Cursor::new(&buf[..]); + assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6); + assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6); + assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006); + assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006); + assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err()); + assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6); + + let mut r = Cursor::new(vec![10]); + assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6); + assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6); + assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006); + assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006); + assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err()); + assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6); + + let mut buf = [0]; + let mut r = Cursor::new(&mut buf[..]); + assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6); + assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6); + assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006); + assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006); + assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err()); + assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6); + + let mut r = Cursor::new(vec![10].into_boxed_slice()); + assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6); + assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6); + assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006); + assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006); + assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err()); + assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6); + } + + #[test] fn seek_before_0() { let buf = [0xff]; let mut r = Cursor::new(&buf[..]); |