🧪 Add edge case tests for applyMergePatch

[google-labs-jules]

🎯 What: The testing gap addressed was missing tests for applyMergePatch edge cases. The function was already well-tested, but several edge case conditions defined in the implementation were not explicitly asserted in the test suite.

📊 Coverage: The following scenarios are now specifically tested and covered:

• Exception handling when the depth limit (MAX_DEPTH) is exceeded.
• Replacing the target correctly when the patch is a primitive or array.
• Treating the target as an empty object if it is primitive, null, or an array.
• Deletion of non-existent properties (handling null values correctly when the property does not exist in the target).
• Correctly applying nested patches when the target's existing property is not an object.
• Properly filtering and applying only a patch's own properties while ignoring inherited ones (e.g., prototype pollution or inherited method applications).

✨ Result: The test suite for applyMergePatch is now comprehensively fortified. It now explicitly catches and verifies all defined edge cases and error conditions, providing a robust safety net to prevent regressions during future refactoring. All tests pass across the entire suite.

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PR created automatically by Jules for task 7532003743146100929 started by @zknpr

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Project	Deployment	Actions	Updated (UTC)
sq-lite-explorer	Ready	Preview, Comment	Jun 13, 2026 5:46pm