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fmt: Make sure goal is always positive

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A debug assertion was added to enforce "width >= goal" to catch
that case before a panic in linebreak.rs. A few warnings in linebreak.rs
were addressed as well, and some isize's that should always be positive
(if there's no width/goal bugs) were changed to usizes to catch bugs
earlier.

test_fmt_width is updated to test for the same result as GNU fmt
This commit is contained in:
Joseph Jon Booker 2024-03-19 00:23:45 -05:00
parent 696615099c
commit f456b9531f
3 changed files with 25 additions and 11 deletions
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14
tests/by-util/test_fmt.rs
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@ -33,7 +33,19 @@ fn test_fmt_width() {
new_ucmd!()
.args(&["one-word-per-line.txt", param, "10"])
.succeeds()
.stdout_is("this is\na file\nwith one\nword per\nline\n");
.stdout_is("this is a\nfile with\none word\nper line\n");
}
}
#[test]
fn test_small_width() {
for width in ["0", "1", "2", "3"] {
for param in ["-w", "--width"] {
new_ucmd!()
.args(&[param, width, "one-word-per-line.txt"])
.succeeds()
.stdout_is("this\nis\na\nfile\nwith\none\nword\nper\nline\n");
}
}
}