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df: allow multiple occurrences of --output arg

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Allow multiple occurrences of the `--output` argument. For example,

    $ df --output=source --output=target | head -n1
    Filesystem                Mounted on
This commit is contained in:
Jeffrey Finkelstein 2022-03-27 22:14:16 -04:00
parent d5d6bc3050
commit a1f300e8a7
2 changed files with 13 additions and 0 deletions
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12
tests/by-util/test_df.rs
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@ -222,6 +222,18 @@ fn test_output_selects_columns() {
);
}
#[test]
fn test_output_multiple_occurrences() {
let output = new_ucmd!()
.args(&["--output=source", "--output=target"])
.succeeds()
.stdout_move_str();
assert_eq!(
output.lines().next().unwrap(),
"Filesystem Mounted on "
);
}
// TODO Fix the spacing.
#[test]
fn test_output_file_all_filesystems() {