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> You can't seriously tell me client retry doesn't have a unit test which ensures the retry back off behaviour

Not to join the parade, but what would a unit test that confirms a cycling behavior across all the instances in-flight even look like? I mean, besides "Not a unit test".

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Mock out the network call (which you'd be doing anyway because unit tests never connect to the network) so it always returns a failure. Mock out the timer.

Call the function multiple times and ensure it'd passing the expected wait durations in for each time it's called followed by a fatal error after say 30 seconds.

> Mock out the network call

Man, the day this hits, just know I didn't judge you at all.

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