[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 introduces unit tests for the toSnakeCase and isObject utility functions in the string module. Below is a summary of the changes:

Added Tests for toSnakeCase

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

• Handles strings with multiple spaces.

• Tests behavior with empty strings.

• Ensures mixed-case strings are converted to lowercase.

• Handles strings containing special characters.

Added Tests for isObject

• Confirms true is returned for plain objects and arrays.

• Validates false is returned for null, undefined, and primitive values.

• Ensures true is returned for class instances.

These tests aim to improve the reliability and correctness of the utility functions.

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