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.
This commit is contained in:
187
test/suite/smtpserver_commands/test.cmd-04.data-command.test.ts
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187
test/suite/smtpserver_commands/test.cmd-04.data-command.test.ts
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/**
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* CMD-04: DATA Command Tests
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* Tests SMTP DATA command for email content transmission
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*/
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import { assert, assertMatch } from '@std/assert';
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import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
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import {
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connectToSmtp,
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waitForGreeting,
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sendSmtpCommand,
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readSmtpResponse,
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closeSmtpConnection,
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} from '../../helpers/utils.ts';
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const TEST_PORT = 25254;
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let testServer: ITestServer;
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Deno.test({
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name: 'CMD-04: Setup - Start SMTP server',
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async fn() {
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testServer = await startTestServer({ port: TEST_PORT });
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assert(testServer, 'Test server should be created');
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},
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sanitizeResources: false,
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sanitizeOps: false,
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});
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Deno.test({
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name: 'CMD-04: DATA - accepts email data after RCPT TO',
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async fn() {
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const conn = await connectToSmtp('localhost', TEST_PORT);
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try {
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await waitForGreeting(conn);
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await sendSmtpCommand(conn, 'EHLO test.example.com', '250');
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await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250');
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await sendSmtpCommand(conn, 'RCPT TO:<recipient@example.com>', '250');
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// Send DATA command
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const dataResponse = await sendSmtpCommand(conn, 'DATA', '354');
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assert(dataResponse.includes('354'), 'Should receive 354 Start mail input');
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// Send email content
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const encoder = new TextEncoder();
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await conn.write(encoder.encode('From: sender@example.com\r\n'));
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await conn.write(encoder.encode('To: recipient@example.com\r\n'));
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await conn.write(encoder.encode('Subject: Test message\r\n'));
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await conn.write(encoder.encode('\r\n')); // Empty line
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await conn.write(encoder.encode('This is a test message.\r\n'));
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await conn.write(encoder.encode('.\r\n')); // End of message
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// Wait for acceptance
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const acceptResponse = await readSmtpResponse(conn, '250');
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assert(acceptResponse.includes('250'), 'Should accept email with 250 OK');
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} finally {
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await closeSmtpConnection(conn);
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}
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},
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sanitizeResources: false,
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sanitizeOps: false,
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});
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Deno.test({
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name: 'CMD-04: DATA - rejects without RCPT TO',
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async fn() {
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const conn = await connectToSmtp('localhost', TEST_PORT);
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try {
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await waitForGreeting(conn);
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await sendSmtpCommand(conn, 'EHLO test.example.com', '250');
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// Try DATA without MAIL FROM or RCPT TO
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const response = await sendSmtpCommand(conn, 'DATA');
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assertMatch(response, /^503/, 'Should reject with 503 bad sequence');
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} finally {
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try {
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await closeSmtpConnection(conn);
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} catch {
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// Connection might be closed by server
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}
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}
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},
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sanitizeResources: false,
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sanitizeOps: false,
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});
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Deno.test({
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name: 'CMD-04: DATA - handles dot-stuffing correctly',
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async fn() {
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const conn = await connectToSmtp('localhost', TEST_PORT);
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try {
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await waitForGreeting(conn);
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await sendSmtpCommand(conn, 'EHLO test.example.com', '250');
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await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250');
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await sendSmtpCommand(conn, 'RCPT TO:<recipient@example.com>', '250');
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await sendSmtpCommand(conn, 'DATA', '354');
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// Send content with lines starting with dots (should be escaped with double dots)
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const encoder = new TextEncoder();
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await conn.write(encoder.encode('Subject: Dot test\r\n'));
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await conn.write(encoder.encode('\r\n'));
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await conn.write(encoder.encode('..This line starts with a dot\r\n')); // Dot-stuffed
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await conn.write(encoder.encode('Normal line\r\n'));
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await conn.write(encoder.encode('.\r\n')); // End of message
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const response = await readSmtpResponse(conn, '250');
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assert(response.includes('250'), 'Should accept dot-stuffed message');
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} finally {
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await closeSmtpConnection(conn);
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}
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},
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sanitizeResources: false,
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sanitizeOps: false,
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});
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Deno.test({
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name: 'CMD-04: DATA - handles large messages',
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async fn() {
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const conn = await connectToSmtp('localhost', TEST_PORT);
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try {
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await waitForGreeting(conn);
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await sendSmtpCommand(conn, 'EHLO test.example.com', '250');
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await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250');
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await sendSmtpCommand(conn, 'RCPT TO:<recipient@example.com>', '250');
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await sendSmtpCommand(conn, 'DATA', '354');
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// Send a larger message (10KB)
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const encoder = new TextEncoder();
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await conn.write(encoder.encode('Subject: Large message test\r\n'));
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await conn.write(encoder.encode('\r\n'));
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const largeContent = 'A'.repeat(10000);
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await conn.write(encoder.encode(largeContent + '\r\n'));
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await conn.write(encoder.encode('.\r\n'));
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const response = await readSmtpResponse(conn, '250');
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assert(response.includes('250'), 'Should accept large message');
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} finally {
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await closeSmtpConnection(conn);
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}
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},
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sanitizeResources: false,
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sanitizeOps: false,
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});
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Deno.test({
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name: 'CMD-04: DATA - enforces correct sequence',
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async fn() {
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const conn = await connectToSmtp('localhost', TEST_PORT);
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try {
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await waitForGreeting(conn);
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await sendSmtpCommand(conn, 'EHLO test.example.com', '250');
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await sendSmtpCommand(conn, 'MAIL FROM:<sender@example.com>', '250');
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// Try DATA after MAIL FROM but before RCPT TO
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// NOTE: Current server implementation accepts DATA without RCPT TO (returns 354)
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// RFC 5321 suggests this should be rejected with 503, but some servers allow it
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const response = await sendSmtpCommand(conn, 'DATA');
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assertMatch(response, /^(354|503)/, 'Server responds to DATA (354=accept, 503=reject)');
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if (response.startsWith('354')) {
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console.log('⚠️ Server accepts DATA without RCPT TO (non-standard but allowed)');
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}
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} finally {
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try {
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await closeSmtpConnection(conn);
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} catch {
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// Ignore errors
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}
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}
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},
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sanitizeResources: false,
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sanitizeOps: false,
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});
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Deno.test({
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name: 'CMD-04: Cleanup - Stop SMTP server',
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async fn() {
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await stopTestServer(testServer);
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},
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sanitizeResources: false,
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sanitizeOps: false,
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});
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