fix(detector): Improve test coverage and adjust detection result handling

readme.hints.md

@@ -37,11 +37,17 @@
 - **v2.0.2**: Added service type detection, protocol fingerprinting, and enhanced API
 
 ## Testing
-- Tests check for closed local ports and open remote ports
-- Tests verify service type detection for HTTP/HTTPS
-- Tests check SSH service detection
+- Comprehensive test suite with 19 tests covering:
+  - Basic port detection (local and remote)
+  - Backward compatibility with `isActiveSimple()`
+  - Service type detection for HTTP, HTTPS, SSH
+  - Error handling and edge cases
+  - Performance benchmarks
+  - Common development ports
+  - Database service detection (MySQL, Redis)
 - Uses `@git.zone/tstest` with tap-style testing
-- Example tests: localhost:3008 (expects closed), lossless.com (expects open)
+- Tests ensure serviceType is always returned when detectServiceType option is true
+- Handles non-standard URL schemes with default ports
 
 ## Notes
 - Project uses pnpm for package management