'export * from #react-navigation/core' error - react-native

Question

I keep getting export * from #react-navigation/core. Unexpected token export whenever I try to run my test for my project :
https://github.com/MatTaNg/React-Native
(run npm i && npm run test:watch [don't worry npm i doesn't take long its a small project])
Here's my package.json
{
"main": "node_modules/expo/AppEntry.js",
"scripts": {
"test": "jest",
"test:watch": "npm run test -- --watchAll"
},
"dependencies": {
"#types/jest": "^26.0.8",
"#types/node": "^14.0.27",
"expo": "~38.0.8",
"expo-status-bar": "^1.0.2",
"react": "~16.11.0",
"react-dom": "~16.11.0",
"react-native": "https://github.com/expo/react-native/archive/sdk-38.0.2.tar.gz",
"react-native-gesture-handler": "^1.7.0",
"react-native-reanimated": "^1.10.1",
"react-native-responsive-screen": "^1.4.1",
"react-native-router-flux": "^4.2.0",
"react-native-screens": "^2.9.0",
"react-native-web": "~0.11.7",
"react-test-renderer": "^16.13.1"
},
"devDependencies": {
"#babel/core": "^7.8.6",
"#testing-library/jest-native": "^3.3.0",
"#testing-library/react-native": "^7.0.1",
"#types/react": "~16.9.41",
"#types/react-native": "~0.62.13",
"jest": "^26.2.2",
"typescript": "~3.9.5"
},
"transformIgnorePatterns": [
"node_modules/(?!(jest-)?react-native)",
"node_modules/?!(react-navigation)"
],
"jest": {
"preset": "react-native"
},
"private": true
}
I'm just not able to figure this out. Something with react-navigation core is messing everything up I think.
Another, separate issue is that for some reason the HTML (jsx) isn't showing up on my mobile device (IOS) but its working fine in the browser. Seems like its just ignoring all the html inside my route.
EDIT:
I've followed the docs https://docs.expo.io/guides/testing-with-jest/
I've just added this to my package.json:
"jest": {
"preset": "react-native",
"transformIgnorePatterns": [
"node_modules/(?!(jest-)?react-native|react-clone-referenced-element|#react-native-community|expo(nent)?|#expo(nent)?/.*|react-navigation|#react-navigation/.*|#unimodules/.*|unimodules|sentry-expo|native-base|#sentry/.*)"
]
},
But now I'm getting this error when I run my test:

Answer 1

you are using expo therefore, you need to install expo-jest and use "preset": "jest-expo"
yarn add jest-expo --dev
package.json
"scripts": {
...
"test": "jest"
},
"jest": {
"preset": "jest-expo"
}
Here is DOCS for Expo jest. so, change expo jest configuration according to docs like below.
{
"main": "node_modules/expo/AppEntry.js",
"scripts": {
"test": "jest",
"test:watch": "npm run test -- --watchAll"
},
"dependencies": {
"#types/jest": "^26.0.8",
"#types/node": "^14.0.27",
"expo": "~38.0.8",
"expo-status-bar": "^1.0.2",
"react": "~16.11.0",
"react-dom": "~16.11.0",
"react-native": "https://github.com/expo/react-native/archive/sdk-38.0.2.tar.gz",
"react-native-gesture-handler": "^1.7.0",
"react-native-reanimated": "^1.10.1",
"react-native-responsive-screen": "^1.4.1",
"react-native-router-flux": "^4.2.0",
"react-native-screens": "^2.9.0",
"react-native-web": "~0.11.7",
"react-test-renderer": "^16.13.1"
},
"devDependencies": {
"#babel/core": "^7.8.6",
"#testing-library/jest-native": "^3.3.0",
"#testing-library/react-native": "^7.0.1",
"#types/react": "~16.9.41",
"#types/react-native": "~0.62.13",
"jest": "^26.2.2",
"typescript": "~3.9.5",
"jest-expo": "^38.0.0"
},
"jest": {
"preset": "jest-expo",
"transformIgnorePatterns": [
"node_modules/(?!(jest-)?react-native|react-clone-referenced-element|#react-native-community|expo(nent)?|#expo(nent)?/.*|react-navigation|#react-navigation/.*|#unimodules/.*|unimodules|sentry-expo|native-base|#sentry/.*)"
]
},
"private": true
}
hope this will help you