[Darwin] Random failure in MTRSwiftDeviceTests test018_SubscriptionErrorWhenNotResubscribing

[bzbarsky-apple]

Reproduction steps

https://github.com/project-chip/connectedhomeip/actions/runs/15160103742/job/42625609953

The basic problem is here:

2025-05-21T11:48:22.7379530Z 2025-05-21 11:47:59.059532+0000 xctest[53945:147749] [DataManagement] 	InteractionModelRevision = 12
2025-05-21T11:48:22.7380510Z 2025-05-21 11:48:02.364402+0000 xctest[53945:147749] [DataManagement] }

Note that we lost the timeslice there for 3300ms between two consecutive log lines.

This is followed by:

2025-05-21T11:48:22.7447720Z 2025-05-21 11:48:02.371352+0000 xctest[53945:147749] [DataManagement] Subscription established in 3392ms with SubscriptionID = 0xcddd5345 MinInterval = 1s MaxInterval = 10s Peer = 01:0000000012344321
...
2025-05-21T11:48:22.7468780Z /Users/runner/work/connectedhomeip/connectedhomeip/src/darwin/Framework/CHIPTests/MTRSwiftDeviceTests.swift:463: error: -[MatterTests.MTRSwiftDeviceTests test018_SubscriptionErrorWhenNotResubscribing] : Asynchronous wait failed: Exceeded timeout of 3 seconds, with unfulfilled expectations: "First subscription complete".

Because yes, if we lose the timeslice for 3.3 seconds we will blow through a 3-second timeout.

Platform

darwin

Platform Version(s)

No response

Type

Unit tested

(Optional) If manually tested please explain why this is only manually tested

No response

Anything else?

No response