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Expand tests for truncate

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This commit is contained in:
James Robson 2021-04-24 15:25:14 +01:00
parent d7e8a03237
commit e9e3d41008
1 changed files with 60 additions and 0 deletions
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60
tests/by-util/test_truncate.rs
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@ -79,3 +79,63 @@ fn test_failed_incorrect_arg() {
let (_at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-s", "+5A", TFILE1]).fails();
}
#[test]
fn test_at_most_shrinks() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE2);
file.write_all(b"1234567890").unwrap();
ucmd.args(&["--size", "<4", TFILE2]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 4);
}
#[test]
fn test_at_most_no_change() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE2);
file.write_all(b"1234567890").unwrap();
ucmd.args(&["--size", "<40", TFILE2]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 10);
}
#[test]
fn test_at_least_grows() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE2);
file.write_all(b"1234567890").unwrap();
ucmd.args(&["--size", ">15", TFILE2]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 15);
}
#[test]
fn test_at_least_no_change() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE2);
file.write_all(b"1234567890").unwrap();
ucmd.args(&["--size", ">4", TFILE2]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 10);
}
#[test]
fn test_round_down() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE2);
file.write_all(b"1234567890").unwrap();
ucmd.args(&["--size", "/4", TFILE2]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 8);
}
#[test]
fn test_round_up() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE2);
file.write_all(b"1234567890").unwrap();
ucmd.args(&["--size", "*4", TFILE2]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 12);
}