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

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@uptime.link/detector',
-  version: '2.1.0',
+  version: '2.1.1',
   description: 'a detector for answering network questions locally. It does not rely on any online services.'
 }

ts/detector.classes.detector.ts

@@ -29,9 +29,13 @@ export class Detector {
         isActive: portAvailable
       };
       
-      if (portAvailable && options?.detectServiceType) {
-        const serviceType = await this.detectType(urlArg);
-        result.serviceType = serviceType;
+      if (options?.detectServiceType) {
+        if (portAvailable) {
+          const serviceType = await this.detectType(urlArg);
+          result.serviceType = serviceType;
+        } else {
+          result.serviceType = ServiceType.UNKNOWN;
+        }
       }
       
       return result;
@@ -46,9 +50,13 @@ export class Detector {
         isActive: portAvailable
       };
       
-      if (portAvailable && options?.detectServiceType) {
-        const serviceType = await this.detectType(urlArg);
-        result.serviceType = serviceType;
+      if (options?.detectServiceType) {
+        if (portAvailable) {
+          const serviceType = await this.detectType(urlArg);
+          result.serviceType = serviceType;
+        } else {
+          result.serviceType = ServiceType.UNKNOWN;
+        }
       }
       
       return result;
@@ -57,7 +65,27 @@ export class Detector {
 
   public async detectType(urlArg: string): Promise<ServiceType> {
     const parsedUrl = plugins.smarturl.Smarturl.createFromUrl(urlArg);
-    const port = parseInt(parsedUrl.port, 10);
+    
+    // Handle different URL schemes and default ports
+    let port = parseInt(parsedUrl.port, 10);
+    if (isNaN(port)) {
+      // Set default ports based on scheme
+      const defaultPorts: { [key: string]: number } = {
+        'http': 80,
+        'https': 443,
+        'ssh': 22,
+        'ftp': 21,
+        'smtp': 25,
+        'mysql': 3306,
+        'postgresql': 5432,
+        'mongodb': 27017,
+        'redis': 6379
+      };
+      
+      const scheme = parsedUrl.protocol.replace(':', '').toLowerCase();
+      port = defaultPorts[scheme] || 80;
+    }
+    
     const hostname = parsedUrl.hostname;
     
     // Check common ports first