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head/tail: add fixes and tests for bytes/lines NUM arg (undocumented sign)

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* change tail bytes/lines clap parsing to fix posix override behavior
* change tail bytes/lines NUM parsing logic to be consistent with head
This commit is contained in:
Jan Scheer 2021-06-01 12:17:11 +02:00
parent a3e047ff16
commit 3c7175f00d
4 changed files with 115 additions and 36 deletions
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48
tests/by-util/test_tail.rs
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@ -352,3 +352,51 @@ fn test_positive_zero_lines() {
.succeeds()
.stdout_is("a\nb\nc\nd\ne\n");
}
#[test]
fn test_tail_invalid_num() {
new_ucmd!()
.args(&["-c", "1024R", "emptyfile.txt"])
.fails()
.stderr_is("tail: invalid number of bytes: ‘1024R’");
new_ucmd!()
.args(&["-n", "1024R", "emptyfile.txt"])
.fails()
.stderr_is("tail: invalid number of lines: ‘1024R’");
#[cfg(not(target_pointer_width = "128"))]
new_ucmd!()
.args(&["-c", "1Y", "emptyfile.txt"])
.fails()
.stderr_is(
"tail: invalid number of bytes: ‘1Y’: Value too large to be stored in data type",
);
#[cfg(not(target_pointer_width = "128"))]
new_ucmd!()
.args(&["-n", "1Y", "emptyfile.txt"])
.fails()
.stderr_is(
"tail: invalid number of lines: ‘1Y’: Value too large to be stored in data type",
);
}
#[test]
fn test_tail_num_with_undocumented_sign_bytes() {
// tail: '-' is not documented (8.32 man pages)
// head: '+' is not documented (8.32 man pages)
const ALPHABET: &str = "abcdefghijklmnopqrstuvwxyz";
new_ucmd!()
.args(&["-c", "5"])
.pipe_in(ALPHABET)
.succeeds()
.stdout_is("vwxyz");
new_ucmd!()
.args(&["-c", "-5"])
.pipe_in(ALPHABET)
.succeeds()
.stdout_is("vwxyz");
new_ucmd!()
.args(&["-c", "+5"])
.pipe_in(ALPHABET)
.succeeds()
.stdout_is("efghijklmnopqrstuvwxyz");
}