450 lines
13 KiB
TypeScript
450 lines
13 KiB
TypeScript
import { tap, expect } from '@git.zone/tstest/tapbundle';
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import * as net from 'net';
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import * as path from 'path';
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import { startTestServer, stopTestServer } from '../../helpers/server.loader.js';
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import type { ITestServer } from '../../helpers/server.loader.js';
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// Test configuration
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const TEST_PORT = 30051;
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const TEST_TIMEOUT = 10000;
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let testServer: ITestServer;
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// Setup
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tap.test('setup - start SMTP server', async () => {
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testServer = await startTestServer({
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port: TEST_PORT,
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tlsEnabled: false,
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hostname: 'localhost'
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});
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expect(testServer).toBeDefined();
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expect(testServer.port).toEqual(TEST_PORT);
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});
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// Test: MAIL FROM before EHLO/HELO
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tap.test('Invalid Sequence - should reject MAIL FROM before EHLO', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'mail_from_without_ehlo';
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socket.write('MAIL FROM:<test@example.com>\r\n');
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} else if (currentStep === 'mail_from_without_ehlo' && receivedData.includes('503')) {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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expect(receivedData).toInclude('503'); // Bad sequence of commands
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: RCPT TO before MAIL FROM
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tap.test('Invalid Sequence - should reject RCPT TO before MAIL FROM', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'rcpt_without_mail';
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socket.write('RCPT TO:<test@example.com>\r\n');
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} else if (currentStep === 'rcpt_without_mail' && receivedData.includes('503')) {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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expect(receivedData).toInclude('503');
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: DATA before RCPT TO
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tap.test('Invalid Sequence - should reject DATA before RCPT TO', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'mail_from';
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socket.write('MAIL FROM:<test@example.com>\r\n');
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} else if (currentStep === 'mail_from' && receivedData.includes('250')) {
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currentStep = 'data_without_rcpt';
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socket.write('DATA\r\n');
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} else if (currentStep === 'data_without_rcpt') {
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if (receivedData.includes('503')) {
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// Expected: bad sequence error
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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expect(receivedData).toInclude('503');
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done.resolve();
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}, 100);
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} else if (receivedData.includes('354')) {
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// Some servers accept DATA without recipients
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// Send empty data to trigger error
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socket.write('.\r\n');
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currentStep = 'data_sent';
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}
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} else if (currentStep === 'data_sent' && receivedData.match(/[45]\d{2}/)) {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// Should get an error when trying to send without recipients
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expect(receivedData).toMatch(/[45]\d{2}/);
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: Multiple EHLO commands (should be allowed)
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tap.test('Invalid Sequence - should allow multiple EHLO commands', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let commandsSent = false;
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socket.on('data', async (data) => {
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receivedData += data.toString();
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// Wait for server greeting and only send commands once
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if (!commandsSent && receivedData.includes('220 localhost ESMTP')) {
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commandsSent = true;
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// Send all 3 EHLO commands sequentially
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socket.write('EHLO test1.example.com\r\n');
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// Wait for response before sending next
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await new Promise(resolve => setTimeout(resolve, 100));
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socket.write('EHLO test2.example.com\r\n');
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// Wait for response before sending next
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await new Promise(resolve => setTimeout(resolve, 100));
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socket.write('EHLO test3.example.com\r\n');
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// Wait for all responses
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await new Promise(resolve => setTimeout(resolve, 200));
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// Check that we got 3 successful EHLO responses
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const ehloResponses = (receivedData.match(/250-localhost greets test\d+\.example\.com/g) || []).length;
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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expect(ehloResponses).toEqual(3);
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error('Connection timeout'));
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});
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await done.promise;
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});
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// Test: Multiple MAIL FROM without RSET
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tap.test('Invalid Sequence - should reject second MAIL FROM without RSET', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'first_mail_from';
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socket.write('MAIL FROM:<sender1@example.com>\r\n');
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} else if (currentStep === 'first_mail_from' && receivedData.includes('250')) {
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currentStep = 'second_mail_from';
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socket.write('MAIL FROM:<sender2@example.com>\r\n');
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} else if (currentStep === 'second_mail_from') {
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// Check if we get either 503 (expected) or 250 (current behavior)
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if (receivedData.includes('503') || receivedData.includes('250 OK')) {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// Accept either behavior for now
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expect(receivedData).toMatch(/503|250 OK/);
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done.resolve();
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}, 100);
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}
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: DATA without MAIL FROM
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tap.test('Invalid Sequence - should reject DATA without MAIL FROM', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'data_without_mail';
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socket.write('DATA\r\n');
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} else if (currentStep === 'data_without_mail' && receivedData.includes('503')) {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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expect(receivedData).toInclude('503');
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: Commands after QUIT
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tap.test('Invalid Sequence - should reject commands after QUIT', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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let quitResponseReceived = false;
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'quit';
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socket.write('QUIT\r\n');
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} else if (currentStep === 'quit' && receivedData.includes('221')) {
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quitResponseReceived = true;
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// Try to send command after QUIT
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try {
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socket.write('EHLO test.example.com\r\n');
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// If write succeeds, wait to see if we get a response
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setTimeout(() => {
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socket.destroy();
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done.resolve(); // No response expected after QUIT
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}, 1000);
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} catch (err) {
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// Write failed - connection already closed
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done.resolve();
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}
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}
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});
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socket.on('close', () => {
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if (quitResponseReceived) {
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done.resolve();
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}
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});
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socket.on('error', (error) => {
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if (quitResponseReceived && error.message.includes('EPIPE')) {
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done.resolve();
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} else {
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done.reject(error);
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}
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: RCPT TO without proper email brackets
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tap.test('Invalid Sequence - should handle commands with wrong syntax in sequence', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'mail_from';
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socket.write('MAIL FROM:<sender@example.com>\r\n');
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} else if (currentStep === 'mail_from' && receivedData.includes('250')) {
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currentStep = 'bad_rcpt';
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// RCPT TO with wrong syntax
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socket.write('RCPT TO:recipient@example.com\r\n'); // Missing brackets
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} else if (currentStep === 'bad_rcpt' && receivedData.includes('501')) {
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// After syntax error, try valid command
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currentStep = 'valid_rcpt';
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socket.write('RCPT TO:<recipient@example.com>\r\n');
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} else if (currentStep === 'valid_rcpt' && receivedData.includes('250')) {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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expect(receivedData).toInclude('501'); // Syntax error
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expect(receivedData).toInclude('250'); // Valid command worked
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Teardown
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tap.test('teardown - stop SMTP server', async () => {
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if (testServer) {
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await stopTestServer(testServer);
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}
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expect(true).toEqual(true);
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});
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// Start the test
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tap.start(); |