react-native-platform-testing

Run 2 set of tests for react native (iOS and Android).

Description

jest.snapshot.resolver.js - is responsible for creating __snapshots__ accoding to TEST_PLATFORM environment variable (if unset - default is ios). That creates a possibility to have 2 different set of snapshots - __snapshots__/ios and __snapshots__/android.

When tests are executed:

• iOS - any test that have Android specific implementation (have a *.android.test.js or *.android.js filename pattern) will be ignored
• Android - any test that have iOS specific implementation (have a *.ios.test.js or *.ios.js filename pattern) will be ignored

Main changes are:

• jest.android.json
• jest.snapshot.resolver.js
• package.json

  "jest": {
    "preset": "react-native",
    "collectCoverageFrom": [
      "**/*.{js,jsx}"
    ],
    "collectCoverage": true,
    "coverageReporters": [
      "lcov",
      "text-summary"
    ],
    "testPathIgnorePatterns": [
      "node_modules",
      ".*\\.android\\..*"
    ],
    "transformIgnorePatterns": [
      "/node_modules/(?!native-base|react-navigation)/"
    ],
    "snapshotResolver": "./jest.snapshot.resolver.js"
  }

Testing

To run tests:

• iOS: yarn test
• Android: yarn test-android

TODO

• figure out how to merge code coverage from 2 test runs