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QA · Senior · Coding

There's a UI test: it creates an order through the API for a shared test user, waits two seconds with sleep, opens the order list, and checks that the first order in the list is the one just created. In a parallel run the test fails about one time in ten. Name the causes and rewrite the test so it becomes stable.

~15 min by voice

How to approach it

They're checking whether you can find the real causes of a flaky test instead of hiding them. Here there are two: a race between parallel tests over shared data, and the order appearing in the list asynchronously. They also look at whether you can rewrite the test with isolated data, lookup by id, and a condition-based wait with a timeout.

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flaky teststest isolation
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Best with headphones · ~15 min