Tests for useMutation.ts

[german664]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @german664, 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 significantly enhances the robustness of the useMutation hook by introducing a comprehensive suite of unit tests. These tests validate the hook's behavior across a wide range of scenarios, from initial state and basic mutation execution to complex callback handling, retry mechanisms, and lifecycle management. Additionally, a crucial update ensures that callbacks are only invoked when the component using the hook is still mounted, preventing potential issues and improving overall stability.

Highlights

• Comprehensive Test Suite: A comprehensive suite of unit tests has been added for the useMutation hook, covering a wide array of scenarios to ensure its reliability.
• Enhanced Stability: The useMutation hook has been made more stable by preventing state updates and callback executions (onSuccess, onError, onSettled) on components that have already unmounted.
• Validation of Core Functionality: Tests validate the hook's initial state, successful and error-prone mutations, loading states, and proper state resets.
• Callback and Retry Logic Tested: Thorough testing of callback mechanisms and retry logic, including custom delays and conditional retries, ensures predictable behavior under various conditions.

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[gemini-code-assist]

Code Review

This pull request introduces a comprehensive test suite for the useMutation hook, which is a great addition for ensuring its stability and correctness. The tests cover initial state, basic functionality, callbacks, retry logic, and component lifecycle edge cases. The accompanying fixes in useMutation.ts to prevent state updates on unmounted components are correct and well-tested. My review focuses on improving the robustness of the tests, particularly in how promise rejections are asserted, and fixing a minor bug in one of the test cases.

[github-actions]

Coverage after merging germanm/unit-tests into group/increase-unit-test-coverage will be

Coverage	Diff
50.81%	▴ +1.05%