[Snyk] Security upgrade jest from 22.4.3 to 26.0.0

[saurabharch]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• packages/react-scripts/package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Predictable Value Range from Previous Values SNYK-JS-FORMDATA-10841150	863

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[gemini-code-assist]

Summary of Changes

Hello @saurabharch, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request, automatically generated by Snyk, aims to enhance the project's security posture by updating a key dependency. The primary objective is to resolve a critical vulnerability by upgrading the jest package to a more secure version.

Highlights

• Security Upgrade: Upgraded the jest testing framework from version 22.4.3 to 26.0.0.
• Vulnerability Fix: This upgrade addresses a critical security vulnerability, SNYK-JS-FORMDATA-10841150, described as 'Predictable Value Range from Previous Values', which was identified by Snyk.

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[gemini-code-assist]

Code Review

This pull request, automatically generated by Snyk, upgrades jest from version 22.4.3 to 26.0.0 to resolve a security vulnerability. While the upgrade is important, this is a major version jump that introduces significant breaking changes. My review highlights critical compatibility issues with related packages and configuration files that must be addressed to prevent the test suite from breaking. Specifically, babel-jest needs to be updated, and Jest configuration files require changes to adapt to the new version.

[gemini-code-assist]

While upgrading jest is necessary for security, this major version jump from 22.x to 26.x introduces several breaking changes that will likely break the test suite. The automated update only changes the jest package, but other changes are required for this to work.

Here are the critical issues that need to be addressed:

1. babel-jest incompatibility: The babel-jest package version should match the jest major version. It is currently 22.4.3 (line 29) and needs to be upgraded to 26.0.0 to be compatible with [email protected].

2. Jest configuration breaking change: Jest 24 renamed the setupTestFrameworkScriptFile configuration option to setupFilesAfterEnv. The current configuration in packages/react-scripts/scripts/utils/createJestConfig.js (line 29) uses the old key, which will be ignored by Jest 26. This will prevent test setup files from running, likely causing test failures.

3. Potentially obsolete workaround: The script packages/react-scripts/scripts/test.js contains a workaround (lines 61-113) for a Jest issue (Add Cluster Module to Webpack node Configuration facebook/create-react-app#5913) that was fixed in Jest 23. This workaround may no longer be necessary and could cause issues with Jest 26.

I strongly recommend addressing these issues in this PR to ensure the tests continue to function correctly after this upgrade.