add some unit tests

[vishesh92]

This pull request adds new unit tests to improve test coverage.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.05%. Comparing base (1b75921) to head (c93aee9).

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #90       +/-   ##
===========================================
+ Coverage   17.53%   50.05%   +32.51%     
===========================================
  Files           4        4               
  Lines         975      975               
===========================================
+ Hits          171      488      +317     
+ Misses        800      473      -327     
- Partials        4       14       +10     

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[Copilot]

Pull request overview

This pull request adds comprehensive unit tests to improve test coverage across three test files. The tests follow established table-driven patterns and use gomock for mocking CloudStack API interactions, providing thorough coverage of various success and error scenarios.

Key Changes

• Added unit test for getRegionFromZone method covering region configuration scenarios
• Added extensive unit tests for loadbalancer helper functions and core operations including IP management, rule management, firewall rules, network ACLs, and host verification
• Added unit tests for provider ID conversion functions

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
cloudstack_test.go	Added TestGetRegionFromZone to test region fallback logic
cloudstack_loadbalancer_test.go	Added 22 comprehensive test functions covering string formatting utilities, IP address management, load balancer rules, firewall rules, network ACLs, and host verification with extensive use of gomock for API mocking
cloudstack_instances_test.go	Added TestGetProviderIDFromInstanceID and TestGetInstanceIDFromProviderID to test provider ID conversion functions

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

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