Expect versions 22.1.0 and 22.0.6 are both under the MIT license and part of the Jest testing framework, maintained in the Facebook Jest repository. Examining their differences is crucial for developers leveraging this assertion library.
The primary distinction lies in their release dates and dependency versions. Version 22.1.0 was published on January 15, 2018, a few days after version 22.0.6, released on January 11, 2018. This indicates a rapid iteration cycle, likely addressing bug fixes or minor enhancements.
A key difference is within the dependencies. While sharing common dependencies like ansi-styles (version ^3.2.0), both versions utilize distinct versions of internal Jest modules. For instance, expect 22.1.0 has "jest-diff":"^22.1.0", "jest-get-type":"^22.1.0", "jest-regex-util":"^22.1.0", "jest-message-util":"^22.1.0" and "jest-matcher-utils":"^22.1.0", while version 22.0.6 uses "jest-diff":"^22.0.6", "jest-get-type":"^22.0.6", "jest-regex-util":"^22.0.6", "jest-message-util":"^22.0.6" and "jest-matcher-utils":"^22.0.6". This alignment of internal package versions within each expect version suggests coordinated updates within the Jest ecosystem.
For developers, upgrading from 22.0.6 to 22.1.0 necessitates careful consideration of potential breaking changes, even though the version bump appears minor. Always consult the Jest changelog for detailed upgrade instructions and potential impact on existing tests. The newer version might introduce performance improvements, bug fixes, or refined error messages, contributing to a smoother testing experience. However, thorough testing after the upgrade is vital to ensure continued test suite stability. Ultimately, the choice depends on project-specific requirements and risk tolerance.
All the vulnerabilities related to the version 22.1.0 of the package
Regular Expression Denial of Service (ReDoS) in micromatch
The NPM package micromatch prior to version 4.0.8 is vulnerable to Regular Expression Denial of Service (ReDoS). The vulnerability occurs in micromatch.braces() in index.js because the pattern .* will greedily match anything. By passing a malicious payload, the pattern matching will keep backtracking to the input while it doesn't find the closing bracket. As the input size increases, the consumption time will also increase until it causes the application to hang or slow down. There was a merged fix but further testing shows the issue persisted prior to https://github.com/micromatch/micromatch/pull/266. This issue should be mitigated by using a safe pattern that won't start backtracking the regular expression due to greedy matching.
Regular Expression Denial of Service (ReDoS) in braces
A vulnerability was found in Braces versions prior to 2.3.1. Affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) attacks.
Regular Expression Denial of Service in braces
Versions of braces prior to 2.3.1 are vulnerable to Regular Expression Denial of Service (ReDoS). Untrusted input may cause catastrophic backtracking while matching regular expressions. This can cause the application to be unresponsive leading to Denial of Service.
Upgrade to version 2.3.1 or higher.
Uncontrolled resource consumption in braces
The NPM package braces fails to limit the number of characters it can handle, which could lead to Memory Exhaustion. In lib/parse.js, if a malicious user sends "imbalanced braces" as input, the parsing will enter a loop, which will cause the program to start allocating heap memory without freeing it at any moment of the loop. Eventually, the JavaScript heap limit is reached, and the program will crash.
