react-native-mock | A fully mocked and test-friendly version | Frontend Framework library

I am getting "React.createContext is not a function" error while running a react-native application. I searched for 'createContent' in the code, it doesn't exist.

Any idea what may be the reason for the error.

It is an iOS build of an app that is already running on android.

Here is my package.json file:

I get an Invariant Violation on Android after migrating to v2 from v1 after startup. How do I fix this?

I've changed my Android device from Android 7.0 to Android 8.0 to run a react-native app on. Previously adding the overlay permission in AndroidManifest allowed the app to run and display the developer menu on the device:

I am getting the following error during an ios build for a file that belongs to a node_modules package:

bundling failed: SyntaxError: /Users/user148634/Desktop/mobile-ui/PriceInsight_app/node_modules/react-native/node_modules/react-native/Libraries/Components/Switch/Switch.js: Support for the experimental syntax 'nullishCoalescingOperator' isn't currently enabled (167:52):

According to this message, the file is in the following path:

This is my Component. It runs without problems on emulator/phone:

I'm a student, who new to jest unit testing, I found some tutorials related to the Jest and I have written some sample code to learn this. But unfortunately it did not work. I have tried several hours to solve this problem, but couldn't find a way.

Here is my code.

This is my App.js

In WebStorm, I cannot get rid of this error:

I have constant crashes on the simulator with an event keyboardDidChangeFrame in RCTKeyboardObserver

I have upgraded an older React Native project to 0.47, 0.48 and then 0.49.x. Since I've done so, I keep getting XCode breaking at random moments with the following breakpoint (sometimes others).

My dependencies "dependencies": { "autobind-decorator": "^2.1.0", "cheerio-without-node-native": "^0.20.2", "diacritic": "0.0.2", "expect": "^1.20.2", "harmony-proxy": "^1.0.1", "hoist-non-react-statics": "^2.3.1", "immutable": "^3.8.1", "lodash": "^4.17.4", "lodash-es": "^4.17.4", "lodash.debounce": "^4.0.8", "lodash.memoize": "^4.1.2", "lodash.mergewith": "^4.6.0", "lodash.sorteduniq": "^4.2.0", "lodash.sorteduniqby": "^4.7.0", "lodash.union": "^4.6.0", "lodash.unionwith": "^4.6.0", "lodash.uniqby": "^4.7.0", "mime-types": "^2.1.17", "moment": "^2.18.1", "normalizr": "^3.2.3", "normalizr-immutable": "0.0.4-beta12", "path": "^0.12.7", "react": "16.0.0-alpha.12", "react-immutable-proptypes": "^2.1.0", "react-intl": "^2.4.0", "react-intl-redux": "^0.6.0", "react-native": "^0.49.3", "react-native-action-button": "^2.7.2", "react-native-animatable": "^1.2.3", "react-native-autolink": "^1.1.1", "react-native-code-push": "5.1.3-beta", "react-native-cookies": "^3.2.0", "react-native-deprecated-custom-components": "^0.1.1", "react-native-drawer": "^2.3.0", "react-native-fetch-blob": "^0.10.8", "react-native-fs": "^2.5.2", "react-native-google-analytics-bridge": "^5.3.3", "react-native-image-crop-picker": "^0.17.2", "react-native-image-picker": "^0.26.7", "react-native-immutable-list-view": "^0.6.2", "react-native-invertible-scroll-view": "^1.0.0", "react-native-keyboard-aware-scroll-view": "0.3.0", "react-native-keychain": "2.0.0-rc", "react-native-lightbox": "^0.7.0", "react-native-linear-gradient": "^2.3.0", "react-native-material-kit": "^0.4.1", "react-native-modalbox": "^1.4.1", "react-native-parallax-scroll-view": "^0.19.0", "react-native-photo-view": "^1.5.2", "react-native-popup-menu": "^0.8.0", "react-native-progress": "^3.3.0", "react-native-scrollable-tab-view": "^0.6.7", "react-native-sglistview": "^0.4.3", "react-native-share": "^1.0.23", "react-native-store": "^0.4.1", "react-native-swiper": "^1.5.12", "react-native-vector-icons": "^4.2.0", "react-navigation": "1.0.0-beta.13", "react-redux": "^5.0.5", "react-swipeable-views": "^0.12.5", "react-swipeable-views-native": "^0.12.5", "realm": "^1.13.0", "redux": "^3.7.2", "redux-form": "^7.0.3", "redux-logger": "^3.0.6", "redux-middleware-oneshot": "^0.1.1", "redux-persist": "^4.8.2", "redux-persist-immutable": "^4.3.0", "redux-persist-transform-immutable": "^4.3.0", "redux-thunk": "^2.2.0", "reselect": "^3.0.1", "route-parser": "0.0.5", "webstomp-client": "^1.0.8" }, "devDependencies": { "babel-cli": "^6.26.0", "babel-core": "^6.26.0", "babel-eslint": "^7.2.3", "babel-jest": "^21.2.0", "babel-plugin-module-resolver": "3.0.0-beta.5", "babel-plugin-react-intl": "^2.3.1", "babel-plugin-transform-class-properties": "^6.24.1", "babel-plugin-transform-decorators-legacy": "^1.3.4", "babel-plugin-transform-es2015-modules-commonjs": "^6.24.1", "babel-preset-airbnb": "^2.4.0", "babel-preset-es2015": "^6.24.1", "babel-preset-react": "^6.24.1", "babel-preset-react-native": "^4.0.0", "babel-preset-react-native-stage-0": "^1.0.1", "babel-register": "^6.24.1", "chai": "^4.1.0", "chai-as-promised": "^7.1.1", "chai-enzyme": "^0.8.0", "chai-immutable": "^1.6.0", "commitizen": "^2.9.6", "cz-conventional-changelog": "^2.0.0", "enzyme": "^3.0.0", "eslint": "^4.7.2", "eslint-config-airbnb": "^15.1.0", "eslint-plugin-babel": "^4.1.2", "eslint-plugin-import": "^2.7.0", "eslint-plugin-jsx-a11y": "^6.0.2", "eslint-plugin-prettier": "^2.3.1", "eslint-plugin-react": "^7.4.0", "eslint-plugin-react-native": "^3.1.0", "expect.js": "^0.3.1", "flow": "^0.2.3", "flow-bin": "^0.56.0", "immutablediff": "^0.4.3", "jest": "^21.2.1", "jest-serializer-enzyme": "^1.0.0", "jshint": "^2.9.5", "mocha": "^3.4.2", "react-addons-test-utils": "^15.6.2", "react-dom": "16.0.0-beta.5", "react-intl-cra": "^0.2.8", "react-native-mock": "^0.3.1", "react-test-renderer": "^16.0.0", "redux-debounce": "^1.0.1", "redux-debounced": "^0.4.0", "redux-devtools": "^3.4.0", "redux-devtools-dock-monitor": "^1.1.2", "redux-devtools-log-monitor": "^1.3.0", "redux-mock-store": "^1.2.3", "remote-redux-devtools": "^0.5.12", "sinon": "^4.0.0", "why-did-you-update": "0.0.8" }

Other symptoms: - react-native run-ios completes with BUILD SUCCEEDED but the app opens and immediately closes on the simulator (works ok from Xcode)

In order to eliminate "old file issues", I created a new react-native project and copied over the newly created xcodeproj file over. To no avail.

Any suggestions?