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Mocked clearTimeout fails #4830

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mjesun opened this issue Nov 2, 2017 · 3 comments · Fixed by #4855
Closed

Mocked clearTimeout fails #4830

mjesun opened this issue Nov 2, 2017 · 3 comments · Fixed by #4855
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@mjesun
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mjesun commented Nov 2, 2017 •
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I just updated to jest@v21.3.0-beta.5 and found what appears to be a bug with clearTimeout when using jest-environment-node + fake timers:

TypeError: Cannot read property 'id' of undefined      
  at Object.timerRefToId [as refToId] (node_modules/jest-environment-node/build/index.js:53:41)
  at TimingAnimation.stop (react-native/Libraries/Animated/src/animations/TimingAnimation.js:149:7)

(For reference, line TimingAnimation:149 is here).
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SimenB commented Nov 3, 2017

Is this #4622?

/cc @vejersele

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mjesun commented Nov 7, 2017

I'm gonna jump into this one.

@mjesun mjesun self-assigned this Nov 7, 2017
@mjesun mjesun mentioned this issue Nov 7, 2017
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Fix timers: reference can be null
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