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FN-5930: stabilize verification spawn supervision test

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Reduce flakiness in the real-git verification spawn supervision test.\n\n- write the child PID to stdout with an awaited newline flush before the parent exits\n- collapse the scenario branching so the SIGTERM path is mutually exclusive with crash handling\n- await parent process exit during cleanup and document coverage across normal, signal, and crash teardown paths\n\nFiles changed:\n .../verification-spawn-supervision.real-git.test.ts              | 9 ++++++---\n 1 file changed, 6 insertions(+), 3 deletions(-)

Fusion-Task-Id: FN-5930

Fusion-Task-Lineage: 20c3fe73-a640-4c34-8a07-edf5bdda4b25
This commit is contained in:
gsxdsm
2026-06-02 21:38:03 -07:00
parent 821d724628
commit 3ac02ccdd3
1 changed files with 6 additions and 3 deletions
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9
packages/engine/src/__tests__/reliability-interactions/verification-spawn-supervision.real-git.test.ts
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@@ -39,11 +39,10 @@ function buildParentScript(scenario: Scenario): string {
killGraceMs: 50,
maxLifetimeMs: 500,
});
console.log(String(child.pid));
await new Promise((resolve) => process.stdout.write(String(child.pid) + "\\n", resolve));
if (${JSON.stringify(scenario)} === "clean-exit") {
process.exit(0);
}
if (${JSON.stringify(scenario)} === "sigterm") {
} else if (${JSON.stringify(scenario)} === "sigterm") {
process.on("SIGTERM", () => process.exit(0));
setInterval(() => {}, 1_000);
} else {
@@ -108,7 +107,9 @@ describe("reliability interactions: FN-5189 verification spawn supervision", ()
// event and deadlock.
const exited = once(parent, "exit").catch(() => {});
try {
const exited = once(parent, "exit");
parent.kill("SIGKILL");
await exited;
} catch {
// ignore cleanup failures
}
@@ -121,6 +122,8 @@ describe("reliability interactions: FN-5189 verification spawn supervision", ()
const caseIt = process.platform === "win32" ? it.skip : it;
caseIt.each([
// Cover all parent teardown surfaces from FN-5893: normal exit, signal-driven exit,
// and crash exit should all reap the supervised keepalive child within the guard window.
["clean-exit"],
["sigterm"],
["uncaught-exception"],