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fix(unmount): Flush useEffect cleanup functions syncronously #746

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Merged
merged 2 commits into from
Jul 15, 2020
Merged

fix(unmount): Flush useEffect cleanup functions syncronously #746

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6ef64ea
fix(unmount): Flush useEffect cleanup functions syncronously
eps1lon Jul 15, 2020
3865525
fix(unmount): Flush cleanup functions syncronously
eps1lon Jul 15, 2020
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fix(unmount): Flush useEffect cleanup functions syncronously
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@eps1lon
eps1lon committed Jul 15, 2020
commit 6ef64ea4a070e83430e1a9ae7d76b8208bf55890
14 changes: 14 additions & 0 deletions src/__tests__/render.js
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Original file line number Diff line number Diff line change
Expand Up @@ -87,3 +87,17 @@ test('renders options.wrapper around node', () => {
</div>
`)
})

test('flushes useEffect cleanup functions sync on unmount()', () => {
const spy = jest.fn()
function Component() {
React.useEffect(() => spy, [])
return null
}
const {unmount} = render(<Component />)
expect(spy).toHaveBeenCalledTimes(0)

unmount()

expect(spy).toHaveBeenCalledTimes(1)
})