Jest config: use real timers by default #46714
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jsnajdr
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nerrad and
ellatrix
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Mamaduka
approved these changes
Dec 22, 2022
Yes. I'd like to first review and merge #46713, and only then rebase this one on top of |
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The There are just two tests ( |
tyxla
approved these changes
Dec 22, 2022
| @@ -24,7 +24,7 @@ module.exports = { | |||
| '**/?(*.)test.[jt]s?(x)', | |||
| ], | |||
| testPathIgnorePatterns: [ '/node_modules/', '<rootDir>/vendor/' ], | |||
| timers: 'fake', | |||
| timers: 'real', | |||
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This looks like it will need a CHANGELOG entry. For some relying on fake timers to be the default, this might be a breaking change.
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I'll return to this in a followup. Now my goal is to:
- land this real timers change
- make
useSelectwithuseSyncExternalStorepass all the tests and merge it - try out the "enable concurrent mode" PR with the new
useSelect, to see if the current e2e failures disappear or not
| const onUpdateSlug = jest.fn(); | ||
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| render( <PostSlug postSlug="index" onUpdateSlug={ onUpdateSlug } /> ); | ||
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| const input = screen.getByRole( 'textbox', { name: 'Slug' } ); | ||
| await user.clear( input ); | ||
| await user.type( input, 'Foo Bar-Baz 9!' ); | ||
| input.blur(); | ||
| act( () => input.blur() ); |
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Maybe we could just trigger a tab and that'd blur it anyway, but in a way resembling user behavior more closely?
| @@ -11,17 +11,15 @@ import { PostSlug } from '../'; | |||
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| describe( 'PostSlug', () => { | |||
| it( 'should update slug with sanitized input', async () => { | |||
| const user = userEvent.setup( { | |||
| advanceTimers: jest.advanceTimersByTime, | |||
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We might have to remove that in more places where it's not necessary.
This was referenced Jan 11, 2023
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This patch changes the default timers used by Jest unit tests from
faketoreal. That should unblock theuseSelectreimplementation in #46538 whose unit tests are now failing because of a React bug (facebook/react#25889). Changing the default works around that bug and should make the unit tests green again.The patch adds an explicit
jest.useFakeTimers()call to all tests that use fake timers explicitly, i.e., use a Jest API to run the fake timers.The
BorderControltest required somewhat more complex changes, which I'm proposing separately in #46713.