Add Comprehensive Unit Tests for Core Functions

[d-oit]

Overview

Add detailed unit tests for all core functions in the GitHub Issue Manager script to ensure each function works correctly in isolation.

Scope

Focus on testing the following core functions:

• validate_input() - Input validation and sanitization
• check_dependencies() - Dependency verification
• load_environment() - Environment loading from .env
• get_repo_context() - Repository information extraction
• create_issues() - Issue creation logic
• link_sub_issue() - Sub-issue relationship creation
• add_to_project() - Project board integration

Test Cases to Implement

validate_input()

• Valid 4 arguments
• Invalid argument count (0, 1, 2, 3, 5+ args)
• Empty string arguments
• Whitespace-only arguments
• Special characters in arguments

check_dependencies()

• All dependencies available
• Missing gh CLI
• Missing jq
• Missing both dependencies

load_environment()

• .env file exists and loads correctly
• .env file missing
• .env file with invalid syntax
• .env file with empty values

Error Handling

• Network failures
• Authentication failures
• Permission denied scenarios
• Invalid repository context

Acceptance Criteria

• All functions have 100% line coverage
• Both success and failure paths are tested
• Mock external dependencies (gh CLI, jq)
• Tests run in isolation without side effects
• Test output is clear and descriptive

Files to Modify

• tests/test-unit.sh - Expand existing unit tests
• tests/test-function-coverage.sh - Add new function-specific tests
• Create new test files if needed for organization

Priority

High - Unit tests are the foundation of a reliable test suite.