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test(relay): retain early startup failure output

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Signed-off-by: Daniel Rouleau <drouleau@squareup.com>
This commit is contained in:
Daniel Rouleau
2026-10-21 18:04:23 -07:00
parent 139157d28b
commit 357da40b39
1 changed files with 9 additions and 4 deletions
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13
crates/buzz-relay/tests/boot_lifecycle.rs
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@@ -170,10 +170,15 @@ fn wait_for_relay_metrics(process: &mut RelayProcess, port: u16) -> String {
fn wait_for_scraped_metric(process: &mut RelayProcess, port: u16, needle: &str) -> String {
let deadline = Instant::now() + METRICS_SCRAPE_DEADLINE;
loop {
assert!(
process.try_wait().is_none(),
"relay exited before exporting {needle}"
);
if let Some(status) = process.try_wait() {
let stdout = join_capture(process.stdout.take(), "stdout");
let stderr = join_capture(process.stderr.take(), "stderr");
panic!(
"relay exited before exporting {needle}: {status}; stdout={}; stderr={}",
String::from_utf8_lossy(&stdout),
String::from_utf8_lossy(&stderr)
);
}
if let Ok(response) = scrape_metrics(port) {
if response.contains(needle) {
return response;