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use std::io::{Read, Write};
use std::os::unix::net::{UnixListener, UnixStream};
use std::path::PathBuf;
use std::process::{Child, Command, ExitStatus, Stdio};
use std::sync::atomic::{AtomicU64, Ordering};
use std::time::{Duration, Instant};
const TIMEOUT: Duration = Duration::from_millis(300);
#[test]
fn bridge_child() {
let Some(path) = std::env::var_os("HERDR_BRIDGE_TEST_SOCKET") else {
return;
};
let stream = crate::ipc::connect_local_stream(&PathBuf::from(path)).unwrap();
let timeout = (std::env::var_os("HERDR_BRIDGE_TEST_LEGACY").is_none()).then_some(TIMEOUT);
super::unix_common::forward_remote_bridge_stdio_with_timeout(stream, timeout).unwrap();
}
struct Bridge {
child: Child,
stream: UnixStream,
path: PathBuf,
}
impl Bridge {
fn start(legacy: bool) -> Self {
static NEXT: AtomicU64 = AtomicU64::new(0);
let path = std::env::temp_dir().join(format!(
"hbl-{}-{}.sock",
std::process::id(),
NEXT.fetch_add(1, Ordering::Relaxed)
));
let listener = UnixListener::bind(&path).unwrap();
listener.set_nonblocking(true).unwrap();
let mut command = Command::new(std::env::current_exe().unwrap());
command
.args([
"--exact",
"platform::remote_bridge_tests::bridge_child",
"--nocapture",
])
.env("HERDR_BRIDGE_TEST_SOCKET", &path)
.env_remove("HERDR_BRIDGE_TEST_LEGACY")
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::inherit());
if legacy {
command.env("HERDR_BRIDGE_TEST_LEGACY", "1");
}
let mut child = command.spawn().unwrap();
let deadline = Instant::now() + Duration::from_secs(3);
let stream = loop {
match listener.accept() {
Ok((stream, _)) => break stream,
Err(error)
if error.kind() == std::io::ErrorKind::WouldBlock
&& Instant::now() < deadline =>
{
std::thread::sleep(Duration::from_millis(5));
}
Err(error) => {
let _ = child.kill();
let _ = child.wait();
let _ = std::fs::remove_file(&path);
panic!("bridge did not connect: {error}");
}
}
};
stream.set_nonblocking(false).unwrap();
stream
.set_read_timeout(Some(Duration::from_secs(3)))
.unwrap();
stream
.set_write_timeout(Some(Duration::from_millis(100)))
.unwrap();
Self {
child,
stream,
path,
}
}
fn wait(&mut self) -> ExitStatus {
let deadline = Instant::now() + Duration::from_secs(3);
loop {
if let Some(status) = self.child.try_wait().unwrap() {
return status;
}
assert!(Instant::now() < deadline, "bridge did not exit");
std::thread::sleep(Duration::from_millis(10));
}
}
fn finish(&mut self) -> String {
drop(self.child.stdin.take());
let mut input = Vec::new();
self.stream.read_to_end(&mut input).unwrap();
self.stream
.write_all(b"final-output-after-stdin-eof")
.unwrap();
self.stream.shutdown(std::net::Shutdown::Write).unwrap();
assert!(self.wait().success());
let mut output = String::new();
self.child
.stdout
.take()
.unwrap()
.read_to_string(&mut output)
.unwrap();
output
}
}
impl Drop for Bridge {
fn drop(&mut self) {
let _ = self.child.kill();
let _ = self.child.wait();
let _ = std::fs::remove_file(&self.path);
}
}
#[test]
fn bridge_expires_when_silent_or_stdout_is_blocked() {
for blocked in [false, true] {
let mut bridge = Bridge::start(false);
if blocked {
let buffer = vec![b'x'; 64 * 1024];
let deadline = Instant::now() + Duration::from_secs(2);
while bridge.stream.write_all(&buffer).is_ok() {
assert!(Instant::now() < deadline, "failed to fill bridge stdout");
}
}
assert_eq!(bridge.wait().code(), Some(1));
}
}
#[test]
fn bridge_preserves_one_way_progress_and_drains_after_stdin_eof() {
for upload in [false, true] {
let mut bridge = Bridge::start(false);
for _ in 0..12 {
if upload {
bridge
.child
.stdin
.as_mut()
.unwrap()
.write_all(b"ping")
.unwrap();
bridge.stream.read_exact(&mut [0; 4]).unwrap();
} else {
bridge.stream.write_all(b"output").unwrap();
}
std::thread::sleep(Duration::from_millis(60));
assert!(bridge.child.try_wait().unwrap().is_none());
}
assert!(bridge.finish().contains("final-output-after-stdin-eof"));
}
}
#[test]
fn legacy_bridge_has_no_idle_deadline() {
let mut bridge = Bridge::start(true);
std::thread::sleep(TIMEOUT * 2);
assert!(bridge.child.try_wait().unwrap().is_none());
assert!(bridge.finish().contains("final-output-after-stdin-eof"));
}
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