Add comprehensive SMTP command tests for RCPT TO, DATA, QUIT, TLS, and basic email sending
- Implement CMD-03 tests for RCPT TO command, validating recipient addresses, handling multiple recipients, and enforcing command sequence. - Implement CMD-04 tests for DATA command, ensuring proper email content transmission, handling of dot-stuffing, large messages, and correct command sequence. - Implement CMD-13 tests for QUIT command, verifying graceful connection termination and idempotency. - Implement CM-01 tests for TLS connections, including STARTTLS capability and direct TLS connections. - Implement EP-01 tests for basic email sending, covering complete SMTP transaction flow, MIME attachments, HTML emails, custom headers, and minimal emails.
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								test/suite/smtpserver_commands/test.cmd-03.rcpt-to.test.ts
									
									
									
									
									
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								test/suite/smtpserver_commands/test.cmd-03.rcpt-to.test.ts
									
									
									
									
									
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| /** | ||||
|  * CMD-03: RCPT TO Command Tests | ||||
|  * Tests SMTP RCPT TO command for recipient validation | ||||
|  */ | ||||
|  | ||||
| import { assert, assertMatch } from '@std/assert'; | ||||
| import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts'; | ||||
| import { | ||||
|   connectToSmtp, | ||||
|   waitForGreeting, | ||||
|   sendSmtpCommand, | ||||
|   closeSmtpConnection, | ||||
| } from '../../helpers/utils.ts'; | ||||
|  | ||||
| const TEST_PORT = 25253; | ||||
| let testServer: ITestServer; | ||||
|  | ||||
| Deno.test({ | ||||
|   name: 'CMD-03: Setup - Start SMTP server', | ||||
|   async fn() { | ||||
|     testServer = await startTestServer({ port: TEST_PORT }); | ||||
|     assert(testServer, 'Test server should be created'); | ||||
|   }, | ||||
|   sanitizeResources: false, | ||||
|   sanitizeOps: false, | ||||
| }); | ||||
|  | ||||
| Deno.test({ | ||||
|   name: 'CMD-03: RCPT TO - accepts valid recipient addresses', | ||||
|   async fn() { | ||||
|     const conn = await connectToSmtp('localhost', TEST_PORT); | ||||
|  | ||||
|     try { | ||||
|       await waitForGreeting(conn); | ||||
|       await sendSmtpCommand(conn, 'EHLO test.example.com', '250'); | ||||
|       await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250'); | ||||
|  | ||||
|       const validRecipients = [ | ||||
|         'user@example.com', | ||||
|         'test.user+tag@example.com', | ||||
|         'user@[192.168.1.1]',  // IP literal | ||||
|         'user@subdomain.example.com', | ||||
|         'multiple_recipients@example.com', | ||||
|       ]; | ||||
|  | ||||
|       for (const recipient of validRecipients) { | ||||
|         console.log(`✓ Testing valid recipient: ${recipient}`); | ||||
|         const response = await sendSmtpCommand(conn, `RCPT TO:<${recipient}>`, '250'); | ||||
|         assert(response.startsWith('250'), `Should accept valid recipient: ${recipient}`); | ||||
|       } | ||||
|     } finally { | ||||
|       await closeSmtpConnection(conn); | ||||
|     } | ||||
|   }, | ||||
|   sanitizeResources: false, | ||||
|   sanitizeOps: false, | ||||
| }); | ||||
|  | ||||
| Deno.test({ | ||||
|   name: 'CMD-03: RCPT TO - accepts multiple recipients', | ||||
|   async fn() { | ||||
|     const conn = await connectToSmtp('localhost', TEST_PORT); | ||||
|  | ||||
|     try { | ||||
|       await waitForGreeting(conn); | ||||
|       await sendSmtpCommand(conn, 'EHLO test.example.com', '250'); | ||||
|       await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250'); | ||||
|  | ||||
|       // Add multiple recipients | ||||
|       await sendSmtpCommand(conn, 'RCPT TO:<user1@example.com>', '250'); | ||||
|       await sendSmtpCommand(conn, 'RCPT TO:<user2@example.com>', '250'); | ||||
|       await sendSmtpCommand(conn, 'RCPT TO:<user3@example.com>', '250'); | ||||
|  | ||||
|       console.log('✓ Successfully added 3 recipients'); | ||||
|     } finally { | ||||
|       await closeSmtpConnection(conn); | ||||
|     } | ||||
|   }, | ||||
|   sanitizeResources: false, | ||||
|   sanitizeOps: false, | ||||
| }); | ||||
|  | ||||
| Deno.test({ | ||||
|   name: 'CMD-03: RCPT TO - rejects invalid recipient addresses', | ||||
|   async fn() { | ||||
|     const conn = await connectToSmtp('localhost', TEST_PORT); | ||||
|  | ||||
|     try { | ||||
|       await waitForGreeting(conn); | ||||
|       await sendSmtpCommand(conn, 'EHLO test.example.com', '250'); | ||||
|       await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250'); | ||||
|  | ||||
|       const invalidRecipients = [ | ||||
|         'notanemail', | ||||
|         '@example.com', | ||||
|         'user@', | ||||
|         'user space@example.com', | ||||
|       ]; | ||||
|  | ||||
|       for (const recipient of invalidRecipients) { | ||||
|         console.log(`✗ Testing invalid recipient: ${recipient}`); | ||||
|         try { | ||||
|           const response = await sendSmtpCommand(conn, `RCPT TO:<${recipient}>`); | ||||
|           assertMatch(response, /^5\d\d/, `Should reject invalid recipient: ${recipient}`); | ||||
|         } catch (error) { | ||||
|           console.log(`  Recipient caused error (acceptable): ${error.message}`); | ||||
|         } | ||||
|       } | ||||
|     } finally { | ||||
|       try { | ||||
|         await closeSmtpConnection(conn); | ||||
|       } catch { | ||||
|         // Ignore close errors | ||||
|       } | ||||
|     } | ||||
|   }, | ||||
|   sanitizeResources: false, | ||||
|   sanitizeOps: false, | ||||
| }); | ||||
|  | ||||
| Deno.test({ | ||||
|   name: 'CMD-03: RCPT TO - enforces correct sequence', | ||||
|   async fn() { | ||||
|     const conn = await connectToSmtp('localhost', TEST_PORT); | ||||
|  | ||||
|     try { | ||||
|       await waitForGreeting(conn); | ||||
|       await sendSmtpCommand(conn, 'EHLO test.example.com', '250'); | ||||
|  | ||||
|       // Try RCPT TO before MAIL FROM | ||||
|       const response = await sendSmtpCommand(conn, 'RCPT TO:<user@example.com>'); | ||||
|       assertMatch(response, /^503/, 'Should reject RCPT TO before MAIL FROM'); | ||||
|     } finally { | ||||
|       try { | ||||
|         await closeSmtpConnection(conn); | ||||
|       } catch { | ||||
|         // Ignore errors | ||||
|       } | ||||
|     } | ||||
|   }, | ||||
|   sanitizeResources: false, | ||||
|   sanitizeOps: false, | ||||
| }); | ||||
|  | ||||
| Deno.test({ | ||||
|   name: 'CMD-03: RCPT TO - RSET clears recipients', | ||||
|   async fn() { | ||||
|     const conn = await connectToSmtp('localhost', TEST_PORT); | ||||
|  | ||||
|     try { | ||||
|       await waitForGreeting(conn); | ||||
|       await sendSmtpCommand(conn, 'EHLO test.example.com', '250'); | ||||
|       await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250'); | ||||
|       await sendSmtpCommand(conn, 'RCPT TO:<user1@example.com>', '250'); | ||||
|       await sendSmtpCommand(conn, 'RCPT TO:<user2@example.com>', '250'); | ||||
|  | ||||
|       // Reset should clear recipients | ||||
|       await sendSmtpCommand(conn, 'RSET', '250'); | ||||
|  | ||||
|       // Should be able to start new transaction | ||||
|       await sendSmtpCommand(conn, 'MAIL FROM:<newsender@example.com>', '250'); | ||||
|       await sendSmtpCommand(conn, 'RCPT TO:<newrecipient@example.com>', '250'); | ||||
|  | ||||
|       console.log('✓ RSET successfully cleared recipients'); | ||||
|     } finally { | ||||
|       await closeSmtpConnection(conn); | ||||
|     } | ||||
|   }, | ||||
|   sanitizeResources: false, | ||||
|   sanitizeOps: false, | ||||
| }); | ||||
|  | ||||
| Deno.test({ | ||||
|   name: 'CMD-03: Cleanup - Stop SMTP server', | ||||
|   async fn() { | ||||
|     await stopTestServer(testServer); | ||||
|   }, | ||||
|   sanitizeResources: false, | ||||
|   sanitizeOps: false, | ||||
| }); | ||||
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