Web Reference: Jan 3, 2021 · It's technically wrong to put anything above imports and expect that it will be evaluated in this order, because ESM imports are hoisted by specs, and jest.mock is hoisted by Jest via Babel transform, this is also specified. Learn how to fix the Jest cannot access before initialization error with this comprehensive guide. Includes step-by-step instructions and code examples. Get your Jest tests passing today! Mar 4, 2021 · Normally this would make Jest warn that mockHello is out of scope, but since it's prefixed with mock we skip this check. But since the variables are not actually initialized before usage (they are imported then exported by mre.js) you get a runtime error.
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