[TestGru] Add unit test for src/utils/string.ts

[gru-agent]

Trigger Info

Trigger Type	Triggered By	Source File	Assignment
Manual	zthreefires	src/utils/string.ts	Detail

Summary

This PR adds unit tests for the toSnakeCase and isObject utility functions in the string module.

Changes:

• toSnakeCase Tests:

  • Verifies conversion of space-separated strings to snake case.

  • Ensures mixed-case strings are converted to lowercase snake case.

  • Handles edge cases like empty strings.

• isObject Tests:

  • Confirms the function returns true for valid objects.

  • Validates the function returns false for non-object values, including null, undefined, strings, numbers, and booleans.

These tests ensure the correctness and robustness of the utility functions.

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