Test bad useEffect return value with noop-renderer #22258
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Tests should now be invariant under variants
eps1lon
commented
Sep 8, 2021
| ).toErrorDev([ | ||
| 'Warning: An effect function must not return anything besides a ' + | ||
| 'function, which is used for clean-up.\n\n' + | ||
| 'It looks like you wrote useEffect(async () => ...) or returned a Promise.', |
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Notice how the warning never differentiates between wrong useEffect and useLayoutEffect
rickhanlonii
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Sep 8, 2021
facebook-github-bot
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Sep 22, 2021
Summary: This sync includes the following changes: - **[f4ac680c7](facebook/react@f4ac680c7 )**: Fixed broken build script --unsafe-partial flag ([#22324](facebook/react#22324)) //<Brian Vaughn>// - **[67222f044](facebook/react@67222f044 )**: [Experiment] Warn if callback ref returns a function ([#22313](facebook/react#22313)) //<Dan Abramov>// - **[263cfa6ec](facebook/react@263cfa6ec )**: [Experimental] Add useInsertionEffect ([#21913](facebook/react#21913)) //<Ricky>// - **[806aaa2e2](facebook/react@806aaa2e2 )**: [useSES shim] Import prefixed native API ([#22310](facebook/react#22310)) //<Andrew Clark>// - **[fd5e01c2e](facebook/react@fd5e01c2e )**: [useSES/extra] Reuse old selection if possible ([#22307](facebook/react#22307)) //<Andrew Clark>// - **[33226fada](facebook/react@33226fada )**: Check for store mutations before commit ([#22290](facebook/react#22290)) //<Andrew Clark>// - **[86c7ca70a](facebook/react@86c7ca70a )**: Fix link ([#22296](facebook/react#22296)) //<Konstantin Popov>// - **[0fd195f29](facebook/react@0fd195f29 )**: update error message to include useLayoutEffect or useEffect on bad e… ([#22279](facebook/react#22279)) //<salazarm>// - **[8f96c6b2a](facebook/react@8f96c6b2a )**: [Bugfix] Prevent infinite update loop caused by a synchronous update in a passive effect ([#22277](facebook/react#22277)) //<Andrew Clark>// - **[4ce89a58d](facebook/react@4ce89a58d )**: Test bad useEffect return value with noop-renderer ([#22258](facebook/react#22258)) //<Sebastian Silbermann>// - **[a3fde2358](facebook/react@a3fde2358 )**: Detect subscriptions wrapped in startTransition ([#22271](facebook/react#22271)) //<salazarm>// Changelog: [General][Changed] - React Native sync for revisions 95d762e...e8feb11 jest_e2e[run_all_tests] Reviewed By: rickhanlonii Differential Revision: D30966369 fbshipit-source-id: 6c88e591005deb1fd93493628ef4695add49186c
zhengjitf
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Apr 15, 2022
* Test bad useEffect return value with noop-renderer * Use previous "root"-approach Tests should now be invariant under variants * Add same test for layout effects
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Summary
Tests introduced in #14069 now use the noop renderer. This would've caught that
react-domdoesn't actually trigger the warnings in React 17 when usinguseEffect(https://codesandbox.io/s/effect-destroy-function-type-izslc?file=/src/App.js)Related: reactwg/react-18#95
How did you test this change?
Backported the proposed test to
17.0.2(git checkout 17.0.2), ranyarn test ReactHooksWithNoopRenderer. When17.0.2was checked out, the test failed. However, it's passing i.e. warnings are logged as expected onHEAD.