Hi,
Our team uses Xcode Cloud to run unit tests, and since around November, we’ve been frequently experiencing timeouts with the following type of process:
@Test func hogeTest() async {
// do something
hoge.do()
// wait until done
await wait(condition: { hoge.isDone })
// test result
#expect(hoge.isSucceeded)
}
private func wait(condition: () async -> Bool, timeout: TimeInterval = 0.5, pollingInterval: TimeInterval = 0.01) async throws {
let deadline = Date().addingTimeInterval(timeout)
while Date() < deadline {
if await condition() { return }
try await Task.sleep(nanoseconds: UInt64(round(pollingInterval * TimeInterval(NSEC_PER_SEC))))
}
Issue.record("timeout")
}
Although sleep is supposed to wait for only a few milliseconds, there are cases where it takes more than 10 seconds, leading to a timeout.
What could be causing this instability in the sleep duration? Additionally, if there are other recommended ways to implement polling and waiting in Swift Testing, I would appreciate it if you could share them.
A feedback report (FB15899163) has already been submitted.
Best regards,
