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test_tail: add test_follow_name_truncate1-3

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Jan Scheer 2021-10-24 22:31:14 +02:00
parent 3f4b0146a1
commit 1d2940b159
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1 changed files with 75 additions and 4 deletions
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79
tests/by-util/test_tail.rs
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@ -1049,10 +1049,10 @@ fn test_follow_name_remove() {
}
#[test]
#[cfg(not(windows))]
fn test_follow_name_truncate() {
#[cfg(target_os = "linux")] // FIXME: fix this test for BSD/macOS
fn test_follow_name_truncate1() {
// This test triggers a truncate event while `tail --follow=name logfile` is running.
// cp logfile backup && head logfile > logfile && sleep 1 && cp backup logfile
// $ cp logfile backup && head logfile > logfile && sleep 1 && cp backup logfile
let ts = TestScenario::new(util_name!());
let at = &ts.fixtures;
@ -1083,7 +1083,78 @@ fn test_follow_name_truncate() {
}
#[test]
#[cfg(not(windows))]
#[cfg(unix)]
fn test_follow_name_truncate2() {
// This test triggers a truncate event while `tail --follow=name logfile` is running.
// $ ((sleep 1 && echo -n "x\nx\nx\n" >> logfile && sleep 1 && \
// echo -n "x\n" > logfile &)>/dev/null 2>&1 &) ; tail --follow=name logfile
let ts = TestScenario::new(util_name!());
let at = &ts.fixtures;
let source = "logfile";
at.touch(source);
let expected_stdout = "x\nx\nx\nx\n";
let expected_stderr = format!("{}: {}: file truncated\n", ts.util_name, source);
let args = ["--follow=name", source];
let mut p = ts.ucmd().args(&args).run_no_wait();
let delay = 1000;
at.append(source, "x\n");
sleep(Duration::from_millis(delay));
at.append(source, "x\n");
sleep(Duration::from_millis(delay));
at.append(source, "x\n");
sleep(Duration::from_millis(delay));
at.truncate(source, "x\n");
sleep(Duration::from_millis(delay));
p.kill().unwrap();
let (buf_stdout, buf_stderr) = take_stdout_stderr(&mut p);
assert_eq!(buf_stdout, expected_stdout);
assert_eq!(buf_stderr, expected_stderr);
}
#[test]
#[cfg(unix)]
fn test_follow_name_truncate3() {
// Opening an empty file in truncate mode should not trigger a truncate event while.
// $ rm -f logfile && touch logfile
// $ ((sleep 1 && echo -n "x\n" > logfile &)>/dev/null 2>&1 &) ; tail --follow=name logfile
let ts = TestScenario::new(util_name!());
let at = &ts.fixtures;
let source = "logfile";
at.touch(source);
let expected_stdout = "x\n";
let args = ["--follow=name", source];
let mut p = ts.ucmd().args(&args).run_no_wait();
let delay = 1000;
sleep(Duration::from_millis(delay));
use std::fs::OpenOptions;
let mut file = OpenOptions::new()
.write(true)
.truncate(true)
.open(at.plus(source))
.unwrap();
file.write_all(b"x\n").unwrap();
sleep(Duration::from_millis(delay));
p.kill().unwrap();
let (buf_stdout, buf_stderr) = take_stdout_stderr(&mut p);
assert_eq!(buf_stdout, expected_stdout);
assert!(buf_stderr.is_empty());
}
fn test_follow_name_move_create() {
// This test triggers a move/create event while `tail --follow=name logfile` is running.
// ((sleep 1 && mv logfile backup && sleep 1 && cp backup logfile &)>/dev/null 2>&1 &) ; tail --follow=name logfile