All Questions
Tagged with react-native jestjs
1,417 questions
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Testting component with react native paper and expo fonts
I'm having some trouble trying to test my React Native Component with jest.
In my components, I have these imports:
import { useState } from 'react';
import { View, Text, TextInput, TouchableOpacity, ...
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41
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Can't mock a lib using jest.mock
So, I'm setting up the unit test environment on my current react native project using jest + @testing-library/react-native. I'm currently mocking some libs we have installed, the one that is giving me ...
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React native with jest Cannot use import statement outside a module
I'm using react native 0.73.0, react 18.2.0, jest 29.6.3, and @testing-library/react-native 12.4.3. When I run command npx jest src/components/ActionButton/__tests__/ActionButton.test.js --...
- 755
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SyntaxError: C:\zero\node_modules\react-native\Libraries\Components\Touchable\TouchableOpacity.js: Missing initializer in const declaration
I'm trying to write tests for my React Native app (using TypeScript). All my unit tests pass without issues, but when writing component tests, I encounter the following error:
● ButtonComponent › ...
- 11
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2
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67
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Snapshot Testing - Realm already opened on current thread with different schema
I have made a React Native app which uses the Realm database. Opening this app and testing it manually does not result in any errors.
I have written tests for the Realm database, such as:
test(&...
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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 ...
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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
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How can I make my Jest test recognize jsx/tsx syntax?
My test is refusing to recognize < angle brackets.
Jest encountered an unexpected token
Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard ...
- 1,343
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69
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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
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81
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Mocking Value not working when passing through mockReturnValue
I'm trying to create some unit tests using jest and I'm trying to mock a simple value. It works when I pass the mock directly, but since I'm trying to test different scenarios, it isn't working when I ...
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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
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82
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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 (...
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50
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Can't get Jest tests to run with reactotron-redux with the following error - SyntaxError: Cannot use import statement outside a module
I have a React Native project and was able to setup reactotron-react-native and my tests were still working fine, but as soon as I installed reactotron-redux and set it up as per documentation, all my ...
- 5,780
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1
answer
447
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npm install is giving error - npm error ERESOLVE unable to resolve dependency tree
In my React Native with TypeScript project, I wanted to install dependencies.
To install Testing Libraries I've used this command:
npm install @testing-library/react-native @testing-library/jest-...
- 37
1
vote
1
answer
427
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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 ...
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