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John Hughes - Testing the Hard Stuff and Staying Sane

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Further reading 1

How do you turn a one-off failure into a replayable test? →Suppose an acknowledged transfer disappears during a leader change. Six engineering talks separate reproducible inputs, shrinkable operations and invariants, then ask whether the fix actually exercises the original failure.This video helps answer · After replaying a thousand steps, which ones must stay?

Caption notes

Hughes generates sequences of API calls against a state-machine model, then shrinks a failing sequence until the remaining calls make the failure easier to reproduce and explain.

Video or transcript source ↗
Original passages · 2
we generate a minimal failing example
John Hughes - Testing the Hard Stuff and Staying Sane · ▶ 3:53–4:00
for each API call we define a state transition function
John Hughes - Testing the Hard Stuff and Staying Sane · ▶ 5:37–5:48

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