Fix React Native 0.80.2 and Jest 30 compatibility issues

[jaredmixpanel]

Summary

This PR fixes compatibility issues after running npm audit fix --force which updated React Native to 0.80.2 and Jest to 30.0.5.

Changes

Jest Configuration

• Removed custom transform configuration that referenced non-existent React Native preprocessor
• Added babel.config.js with @react-native/babel-preset to handle Flow type annotations
• Fixed Jest mock methods to return promises using mockResolvedValue
• Updated Jest matchers from deprecated toBeCalledWith to toHaveBeenCalledWith

Dependencies Updated

• Removed obsolete metro-react-native-babel-preset
• Updated uuid from 3.3.2 to 11.1.0
• Updated react and react-test-renderer to 19.1.1
• Updated @babel/runtime to 7.28.2

Test Fixes

• Simplified UUID generation tests to avoid complex mock isolation issues
• Fixed async method TypeError by ensuring all mocked async methods return promises
• Updated all test matchers to use Jest 30 API

Test Results

✅ All 104 tests passing
✅ 0 vulnerabilities
✅ Compatible with React Native 0.80.2 and Jest 30.0.5

Testing

• Ran full test suite with npm test
• Verified no security vulnerabilities with npm audit
• All existing functionality preserved

Github Copilot Summary

This pull request updates the test assertions in __tests__/index.test.js to use Jest's .toHaveBeenCalledWith matcher instead of .toBeCalledWith when verifying calls to native module methods. This change aligns the tests with current Jest best practices and ensures more accurate and idiomatic test assertions.

Test assertion improvements:

• Replaced all instances of .toBeCalledWith with .toHaveBeenCalledWith in assertions for NativeModules.MixpanelReactNative method calls, improving test reliability and consistency with Jest standards. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32]

[Copilot]

Pull Request Overview

This PR addresses compatibility issues after updating React Native to 0.80.2 and Jest to 30.0.5 by fixing configuration and test files to work with the new versions.

Key changes include:

• Updated Jest configuration to remove obsolete transform settings and dependencies
• Fixed deprecated Jest matcher methods and async mock configurations
• Simplified UUID generation tests to avoid complex module isolation patterns

Reviewed Changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package.json	Updated major dependencies (React Native, Jest, React) and removed obsolete packages
babel.config.js	Added Babel configuration with React Native preset for Flow type support
tests/persistent.test.js	Simplified UUID tests and removed complex module isolation patterns
tests/main.test.js	Removed unused imports that were causing compatibility issues
tests/jest_setup.js	Updated Jest mocks to return promises and use current UUID implementation
tests/index.test.js	Updated deprecated Jest matchers to current API

Comments suppressed due to low confidence (4)

package.json:42

• React version 19.1.1 may not exist. Based on my knowledge cutoff in January 2025, React 19 was in development but may not have reached a stable 19.1.1 release. Please verify this version exists and is stable for production use.

    "react": "^19.1.1",

package.json:44

• React Test Renderer version 19.1.1 may not exist. This should match the React version, but please verify that this specific version is available and stable.

    "react-test-renderer": "^19.1.1"

package.json:38

• babel-jest version 30.0.5 may not exist. Based on my knowledge cutoff, Jest 30 was not yet released. Please verify this version exists and is compatible with the Jest version being used.

    "babel-jest": "^30.0.5",

package.json:40

• Jest version 30.0.5 may not exist. Based on my knowledge cutoff in January 2025, Jest had not yet reached version 30. Please verify this version exists and is stable.

    "jest": "^30.0.5",