Test/add root command unit tests

[salignatmoandal]

What I've Done

Test Coverage Added:

• Structure validation: Command name, description, completion options
• Flag validation: All persistent flags (log-level, telemetry, domain, silent)
• Subcommand registration: All 16 expected subcommands
• Execution tests: Help, version, and flag combinations
• Error handling: Invalid inputs and edge cases
• Environment tests: Variable overrides and configuration
• Performance: Basic benchmarking

Technical Approach:

• Isolated testing patterns to avoid global init() conflicts
• Table-driven tests for comprehensive coverage
• Proper error assertions using testify
• Go testing best practices

Coverage:

• Root command: 100% for tested functionality
• Module coverage: 6.8% (root tests only), 7.3% (overall)

What Still Needs to Be Done

High Priority:

1. API Mocking Infrastructure - Create packages/testutil/mocks.go for isolated testing
2. Integration Tests - Add test/integration/ for end-to-end validation
3. Other Command Modules - Test login, secrets, export, run (currently 0% coverage each)

Medium Priority:

4. Error Recovery Tests - Network failures, config corruption, permissions
5. Edge Case Tests - Long inputs, special characters, concurrent execution

Impact

Immediate:

• Root command coverage from ~0% to comprehensive validation
• Improved reliability through systematic testing
• Foundation for future test improvements

Long-term:

• Regression prevention
• Documentation through tests
• Easier contributor onboarding

How to Test

go test ./packages/cmd/ -v -run TestRootCommand
go test ./packages/cmd/ -cover -run TestRootCommand
go test ./packages/cmd/ -bench=BenchmarkRootCommand

Key Discoveries

• Log levels accept invalid values silently (tolerant behavior)
• All 16 subcommands properly registered
• Environment variables work correctly
• Error handling consistent for invalid flags

Compliance

• ✅ Predictable and consistent patterns
• ✅ Comprehensive error handling
• ✅ Full test coverage for root functionality
• ✅ Go testing conventions followed

Hello guys, love the project! I'm available if needed. Thanks!