mirror of
https://github.com/uutils/coreutils
synced 2024-12-24 03:53:16 +00:00
99b39e4237
Although for some tests this adds characters we still use them there because the brevity cost is now worth the benefit in terms of instant, natural-language readability and recognizability for people not familiar with this tests of this module or even the project
32 lines
942 B
Rust
32 lines
942 B
Rust
use common::util::*;
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use std::io::{Seek, SeekFrom, Write};
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static UTIL_NAME: &'static str = "truncate";
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fn at_and_ucmd() -> (AtPath, UCommand) {
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let ts = TestScenario::new(UTIL_NAME);
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let ucmd = ts.ucmd();
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(ts.fixtures, ucmd)
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}
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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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