ts-jest issue in React Native version 0.56

[siuhangw]

• Review the documentation: https://facebook.github.io/react-native
• Search for existing issues: https://github.com/facebook/react-native/issues
• [] Use the latest React Native release: https://github.com/facebook/react-native/releases

Environment

React Native Environment Info:
System:
OS: macOS High Sierra 10.13.6
CPU: x64 Intel(R) Core(TM) i5-4260U CPU @ 1.40GHz
Memory: 52.20 MB / 4.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 8.11.2 - /usr/local/bin/node
Yarn: 1.9.2 - /usr/local/bin/yarn
npm: 5.6.0 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
iOS SDK:
Platforms: iOS 12.0, macOS 10.14, tvOS 12.0, watchOS 5.0
Android SDK:
Build Tools: 25.0.1, 26.0.2, 26.0.3, 27.0.3
API Levels: 19, 23, 25, 26, 27
IDEs:
Android Studio: 3.1 AI-173.4907809
Xcode: 10.0/10A255 - /usr/bin/xcodebuild
npmPackages:
@types/react: ^16.4.14 => 16.4.14
@types/react-native: ^0.57.0 => 0.57.0
react: 16.4.1 => 16.4.1
react-native: 0.56.0 => 0.56.0
npmGlobalPackages:
react-native-cli: 2.0.1
react-native-git-upgrade: 0.2.7

Description

Cannot check test case, after run "yarn test" in my react native project

Reproducible Demo

Wongs-MacBook-Air:capstonefrontend siuhang$ yarn test
yarn run v1.9.2
$ jest
ts-jest[main] (WARN) Replace any occurrences of "ts-jest/dist/preprocessor.js" or "/node_modules/ts-jest/preprocessor.js" in the 'transform' section of your Jest config with just "ts-jest".
FAIL tests/App-test.tsx
● Test suite failed to run

/Users/siuhang/Code/capstonefrontend/node_modules/react-native/Libraries/Utilities/Platform.ios.js: Unexpected token, expected { (35:17)

    33 |     return constants ? constants.interfaceIdiom === 'tv' : false;
    34 |   },
  > 35 |   get isTesting(): boolean {
       |                  ^
    36 |     const constants = NativeModules.PlatformConstants;
    37 |     return constants && constants.isTesting;
    38 |   },

Test Suites: 1 failed, 1 total
Tests: 0 total
Snapshots: 0 total
Time: 4.878s
Ran all test suites.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

[alexmbp]

@siuhangw Check you jest config
"transform": { "^.+\\.(js|jsx)$": "<rootDir>/node_modules/react-native/jest/preprocessor.js", "\\.(ts|tsx)$": "ts-jest" },

It has to use different preprocessor now

[kelset]

Thanks @alexmbp for replying, it seems that your solution was the correct one since there has been no further activity. Closing.