All Questions
444 questions
0
votes
0
answers
38
views
WatermelonDB's withObservables leaking when using with Jest
I'm encountering an issue with Jest while running tests for a React Native component called AccountList. This is a "enhanced" component that uses WatermelonDB's withObservables to keep track ...
0
votes
0
answers
15
views
React Native Expo Jest Tests: No ".then()" statements are entered in loading in data tests
I am writing feature specs for my application. The application is a music player app, and the user can edit their playlists. The feature in question I am testing edits a track, or all the tracks, in ...
- 75
1
vote
0
answers
69
views
How to create a unit test for React-Native-Signature-Canvas or mock a method
I wrote a unit test on react-native-signature-canvas, of which only 4/5 succeeded. My last test case "calls readSignatureMock when the TouchableOpacity button is pressed" is failing because ...
user11063453
2
votes
0
answers
90
views
ReferenceError: expect is not defined ( react-native , @testing-library/react-native )
I have been facing two issues mainly
console.error
Warning: React.createElement: type is invalid -- expected a string (for built-in
components) or a class/function (for composite components) but ...
- 1,159
0
votes
0
answers
82
views
How to handle react component being unmounted on user press in unit testing
I am writing Jest tests for my react native application. When I use user.press function, I get the following error:
Unable to find node on an unmounted component.
at findCurrentFiberUsingSlowPath (...
1
vote
1
answer
427
views
Jest: Cannot read properties of undefined (reading 'getItem') when trying to mock Async Storage
I am struggling getting my jest spec to work with AsyncStorage. I followed the guide on Jest integration with Async Storage and used the guidance for setting up the mocks directory. This makes my ...
- 75
13
votes
1
answer
5k
views
Jest tests started failing with TypeError: A dynamic import callback was invoked without --experimental-vm-modules after recent React Native upgrade
I've been trying to resolve this test error for a while now with not success. Recently I upgraded React Native from 0.72.3 to 0.74.3 and got the Android application to build and run, however, I can't ...
- 5,780
-1
votes
1
answer
253
views
Getting error in Component testing - Jest & react-native testing library
Getting error when using the render method to test component
`Trying to detect host component names triggered the following error:
Unexpected token 'export'
There seems to be an issue with your ...
- 47
0
votes
0
answers
43
views
Issue while writing Unit Test case with jest for testing a function depends on AuthContext state
I am getting an issue "TypeError: Cannot read properties of undefined (reading '_context')Jest" while writing Unit Test Case with jest in my react native project with java script.
I have ...
0
votes
0
answers
62
views
__DEV__ not defined for React Native Jest in React + React Native monorepo
I have a monorepo with a React project and a React Native project, they both run fine but the jest tests do not work on React Native tests
I'm getting the error:
FAIL packages/app/components/index....
- 39
0
votes
3
answers
2k
views
TypeError: Cannot assign to read only property 'fetch' of object '[object global]'
I've encountered an error with my tests from a mysterious way.
Context :
I have a lot of testing files that work for everyone expect me.
In the only test that fail, the only issue is this line :
const ...
- 1
0
votes
1
answer
147
views
Testing in React Native with ts: Cannot use import statement outside a module
When running my test using Jest in my React-Native project with typescript, I cant manage to get rid of this import error:
SyntaxError: Cannot use import statement outside a module
I only have a ...
- 145
2
votes
0
answers
829
views
Invariant Violation: __fbBatchedBridgeConfig is not set, cannot invoke native modules
I am getting he following error when running a jest test:
● Test suite failed to run
Invariant Violation: __fbBatchedBridgeConfig is not set, cannot invoke native modules
1 | import { Platform } ...
- 458
0
votes
1
answer
8k
views
Element type is invalid: expected a string (for built-in components) or a class/function (for composite components)... with correct import/export
Error
I'm trying to render a component in jest and getting the following
Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: ...
- 21
0
votes
1
answer
514
views
React Navigation is not navigating to the screen when testing with React Native Testing Library and Jest
I have configured everything as described in the React Native Testing Library guide.
Test case description -
I load the home screen, tap on a list item in the home screen which navigates to the movie ...
- 107