✅ Add tests for most functions

[DanielRuthardt]

📑 What

Add tests for most functions.

❓ Why

The test have already helped (before this PR got created) to identify and fix various issues that have been in functions for months and years. Testing is critical in functional programming.

⚡ How to Review

✅ Testing

• I have tested my work
• I need you to test it too

[Copilot]

Pull Request Overview

This PR adds comprehensive test coverage for user and file manipulation functions in a bash library. The tests validate various edge cases and have already helped identify bugs that existed for months or years.

Key changes:

• Added tests for user functions: get_uid, get_shell, get_groups, and get_gid
• Added tests for file functions: is_world_writable, is_world_readable, is_world_executable, is_world_accessible, inherit_owners, copy_owners, and copy
• Improved existing get_home test with consistent variable naming and simplified logic

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
libs/user/tests/get_uid/test	Tests user ID retrieval for explicit users, current user, environment variable, and custom users
libs/user/tests/get_shell/test	Tests shell retrieval for various user scenarios
libs/user/tests/get_home/test	Refactored with consistent naming (sudoCommand) and simplified current user test
libs/user/tests/get_groups/test	Tests group membership retrieval for single and multiple groups
libs/user/tests/get_gid/test	Tests group ID retrieval with complex setup for custom GID
libs/file/tests/is_world_writable/test	Tests world-writable permission detection across various permission modes
libs/file/tests/is_world_readable/test	Tests world-readable permission detection across various permission modes
libs/file/tests/is_world_executable/test	Tests world-executable permission detection across various permission modes
libs/file/tests/is_world_accessible/test	Tests accessibility checks for files and directories with nested structures
libs/file/tests/inherit_owners/test	Tests ownership inheritance from parent directories
libs/file/tests/copy_owners/test	Tests ownership copying between files and directories
libs/file/tests/copy/test	Tests file and directory copying with ownership preservation

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