update

test/helpers/server.loader.ts

@@ -49,9 +49,9 @@ export async function startTestServer(config: ITestServerConfig): Promise<ITestS
     }
   } as any;
 
-  // Load test certificates if TLS is enabled
-  let key: string | undefined;
-  let cert: string | undefined;
+  // Load test certificates
+  let key: string;
+  let cert: string;
   
   if (serverConfig.tlsEnabled) {
     try {
@@ -89,6 +89,34 @@ export async function startTestServer(config: ITestServerConfig): Promise<ITestS
       cert = pki.certificateToPem(certificate);
       key = pki.privateKeyToPem(keys.privateKey);
     }
+  } else {
+    // Always provide a self-signed certificate for non-TLS servers
+    // This is required by the interface
+    const forge = await import('node-forge');
+    const pki = forge.pki;
+    
+    // Generate key pair
+    const keys = pki.rsa.generateKeyPair(2048);
+    
+    // Create certificate
+    const certificate = pki.createCertificate();
+    certificate.publicKey = keys.publicKey;
+    certificate.serialNumber = '01';
+    certificate.validity.notBefore = new Date();
+    certificate.validity.notAfter = new Date();
+    certificate.validity.notAfter.setFullYear(certificate.validity.notBefore.getFullYear() + 1);
+    
+    const attrs = [{
+      name: 'commonName',
+      value: serverConfig.hostname
+    }];
+    certificate.setSubject(attrs);
+    certificate.setIssuer(attrs);
+    certificate.sign(keys.privateKey);
+    
+    // Convert to PEM
+    cert = pki.certificateToPem(certificate);
+    key = pki.privateKeyToPem(keys.privateKey);
   }
 
   // SMTP server options
@@ -103,7 +131,10 @@ export async function startTestServer(config: ITestServerConfig): Promise<ITestS
     socketTimeout: serverConfig.timeout,
     connectionTimeout: serverConfig.timeout * 2,
     cleanupInterval: 300000,
-    auth: serverConfig.authRequired
+    auth: serverConfig.authRequired ? {
+      required: true,
+      methods: ['PLAIN', 'LOGIN'] as ('PLAIN' | 'LOGIN' | 'OAUTH2')[]
+    } : undefined
   };
 
   // Create SMTP server