mirror of
https://github.com/uutils/coreutils
synced 2024-12-14 15:22:38 +00:00
26 lines
763 B
Rust
26 lines
763 B
Rust
use common::util::*;
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use std::io::{Seek, SeekFrom, Write};
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static TFILE1: &'static str = "truncate_test_1";
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static TFILE2: &'static str = "truncate_test_2";
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#[test]
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fn test_increase_file_size() {
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let (at, mut ucmd) = at_and_ucmd!();
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let mut file = at.make_file(TFILE1);
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ucmd.args(&["-s", "+5K", TFILE1]).succeeds();
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file.seek(SeekFrom::End(0)).unwrap();
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assert!(file.seek(SeekFrom::Current(0)).unwrap() == 5 * 1024);
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}
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#[test]
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fn test_decrease_file_size() {
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let (at, mut ucmd) = at_and_ucmd!();
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let mut file = at.make_file(TFILE2);
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file.write_all(b"1234567890").unwrap();
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ucmd.args(&["--size=-4", TFILE2]).succeeds();
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file.seek(SeekFrom::End(0)).unwrap();
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assert!(file.seek(SeekFrom::Current(0)).unwrap() == 6);
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}
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