2.1 Functional Requirements

• Unit test framework - Implemented in test_framework.c
• Integration test framework - Supported via test suites
• Hardware test framework - Stubbed for future implementation
• Test discovery and execution - d3tui_test_run_all(), d3tui_test_run_suite()
• Test reporting - d3tui_test_print_stats(), d3tui_test_print_results()
• Test isolation - Each test runs independently
• Mocking framework - Stubbed (d3tui_mock_function(), etc.)
• Performance benchmarking - Stubbed (d3tui_benchmark_run())