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tests ~ reorganize tests

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Roy Ivy III 2020-05-25 12:41:25 -05:00
parent 1c88bc8c45
commit de0375f909
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tests/by-util/test_truncate.rs Normal file
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use crate::common::util::*;
use std::io::{Seek, SeekFrom, Write};
static TFILE1: &'static str = "truncate_test_1";
static TFILE2: &'static str = "truncate_test_2";
#[test]
fn test_increase_file_size() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE1);
ucmd.args(&["-s", "+5K", TFILE1]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 5 * 1024);
}
#[test]
fn test_decrease_file_size() {
let (at, mut ucmd) = at_and_ucmd!();
let mut file = at.make_file(TFILE2);
file.write_all(b"1234567890").unwrap();
ucmd.args(&["--size=-4", TFILE2]).succeeds();
file.seek(SeekFrom::End(0)).unwrap();
assert!(file.seek(SeekFrom::Current(0)).unwrap() == 6);
}