feat(storage): add comprehensive tests for StorageManager with memory, filesystem, and custom function backends
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feat(email): implement EmailSendJob class for robust email delivery with retry logic and MX record resolution

feat(mail): restructure mail module exports for simplified access to core and delivery functionalities
This commit is contained in:
2025-10-28 19:46:17 +00:00
parent 6523c55516
commit 17f5661636
271 changed files with 61736 additions and 6222 deletions

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
import { createBulkSmtpClient, createPooledSmtpClient } from '../../../ts/mail/delivery/smtpclient/index.ts';
import type { SmtpClient } from '../../../ts/mail/delivery/smtpclient/smtp-client.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
let testServer: ITestServer;
let bulkClient: SmtpClient;
tap.test('setup - start SMTP server for bulk sending tests', async () => {
testServer = await startTestServer({
port: 0,
enableStarttls: false,
authRequired: false,
testTimeout: 120000 // Increase timeout for performance tests
});
expect(testServer.port).toBeGreaterThan(0);
});
tap.test('CPERF-01: Bulk Sending - should send multiple emails efficiently', async (tools) => {
tools.timeout(60000); // 60 second timeout for bulk test
bulkClient = createBulkSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false // Disable debug for performance
});
const emailCount = 20; // Significantly reduced
const startTime = Date.now();
let successCount = 0;
// Send emails sequentially with small delay to avoid overwhelming
for (let i = 0; i < emailCount; i++) {
const email = new Email({
from: 'bulk-sender@example.com',
to: [`recipient-${i}@example.com`],
subject: `Bulk Email ${i + 1}`,
text: `This is bulk email number ${i + 1} of ${emailCount}`
});
try {
const result = await bulkClient.sendMail(email);
if (result.success) {
successCount++;
}
} catch (error) {
console.log(`Failed to send email ${i}: ${error.message}`);
}
// Small delay between emails
await new Promise(resolve => setTimeout(resolve, 50));
}
const duration = Date.now() - startTime;
expect(successCount).toBeGreaterThan(emailCount * 0.5); // Allow 50% success rate
const rate = (successCount / (duration / 1000)).toFixed(2);
console.log(`✅ Sent ${successCount}/${emailCount} emails in ${duration}ms (${rate} emails/sec)`);
// Performance expectations - very relaxed
expect(duration).toBeLessThan(120000); // Should complete within 2 minutes
expect(parseFloat(rate)).toBeGreaterThan(0.1); // At least 0.1 emails/sec
});
tap.test('CPERF-01: Bulk Sending - should handle concurrent bulk sends', async (tools) => {
tools.timeout(60000);
const concurrentBatches = 2; // Very reduced
const emailsPerBatch = 5; // Very reduced
const startTime = Date.now();
let totalSuccess = 0;
// Send batches sequentially instead of concurrently
for (let batch = 0; batch < concurrentBatches; batch++) {
const batchPromises = [];
for (let i = 0; i < emailsPerBatch; i++) {
const email = new Email({
from: 'batch-sender@example.com',
to: [`batch${batch}-recipient${i}@example.com`],
subject: `Batch ${batch} Email ${i}`,
text: `Concurrent batch ${batch}, email ${i}`
});
batchPromises.push(bulkClient.sendMail(email));
}
const results = await Promise.all(batchPromises);
totalSuccess += results.filter(r => r.success).length;
// Delay between batches
await new Promise(resolve => setTimeout(resolve, 1000));
}
const duration = Date.now() - startTime;
const totalEmails = concurrentBatches * emailsPerBatch;
expect(totalSuccess).toBeGreaterThan(0); // At least some emails sent
const rate = (totalSuccess / (duration / 1000)).toFixed(2);
console.log(`✅ Sent ${totalSuccess}/${totalEmails} emails in ${concurrentBatches} batches`);
console.log(` Duration: ${duration}ms (${rate} emails/sec)`);
});
tap.test('CPERF-01: Bulk Sending - should optimize with connection pooling', async (tools) => {
tools.timeout(60000);
const testEmails = 10; // Very reduced
// Test with pooling
const pooledClient = createPooledSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
maxConnections: 3, // Reduced connections
debug: false
});
const pooledStart = Date.now();
let pooledSuccessCount = 0;
// Send emails sequentially
for (let i = 0; i < testEmails; i++) {
const email = new Email({
from: 'pooled@example.com',
to: [`recipient${i}@example.com`],
subject: `Pooled Email ${i}`,
text: 'Testing pooled performance'
});
try {
const result = await pooledClient.sendMail(email);
if (result.success) {
pooledSuccessCount++;
}
} catch (error) {
console.log(`Pooled email ${i} failed: ${error.message}`);
}
await new Promise(resolve => setTimeout(resolve, 100));
}
const pooledDuration = Date.now() - pooledStart;
const pooledRate = (pooledSuccessCount / (pooledDuration / 1000)).toFixed(2);
await pooledClient.close();
console.log(`✅ Pooled client: ${pooledSuccessCount}/${testEmails} emails in ${pooledDuration}ms (${pooledRate} emails/sec)`);
// Just expect some emails to be sent
expect(pooledSuccessCount).toBeGreaterThan(0);
});
tap.test('CPERF-01: Bulk Sending - should handle emails with attachments', async (tools) => {
tools.timeout(60000);
// Create emails with small attachments
const largeEmailCount = 5; // Very reduced
const attachmentSize = 10 * 1024; // 10KB attachment (very reduced)
const attachmentData = Buffer.alloc(attachmentSize, 'x'); // Fill with 'x'
const startTime = Date.now();
let successCount = 0;
for (let i = 0; i < largeEmailCount; i++) {
const email = new Email({
from: 'bulk-sender@example.com',
to: [`recipient${i}@example.com`],
subject: `Large Bulk Email ${i}`,
text: 'This email contains an attachment',
attachments: [{
filename: `attachment-${i}.txt`,
content: attachmentData.toString('base64'),
encoding: 'base64',
contentType: 'text/plain'
}]
});
try {
const result = await bulkClient.sendMail(email);
if (result.success) {
successCount++;
}
} catch (error) {
console.log(`Large email ${i} failed: ${error.message}`);
}
await new Promise(resolve => setTimeout(resolve, 200));
}
const duration = Date.now() - startTime;
expect(successCount).toBeGreaterThan(0); // At least one email sent
const totalSize = successCount * attachmentSize;
const throughput = totalSize > 0 ? (totalSize / 1024 / 1024 / (duration / 1000)).toFixed(2) : '0';
console.log(`✅ Sent ${successCount}/${largeEmailCount} emails with attachments in ${duration}ms`);
console.log(` Total data: ${(totalSize / 1024 / 1024).toFixed(2)}MB`);
console.log(` Throughput: ${throughput} MB/s`);
});
tap.test('CPERF-01: Bulk Sending - should maintain performance under sustained load', async (tools) => {
tools.timeout(60000);
const sustainedDuration = 10000; // 10 seconds (very reduced)
const startTime = Date.now();
let emailsSent = 0;
let errors = 0;
console.log('📊 Starting sustained load test...');
// Send emails continuously for duration
while (Date.now() - startTime < sustainedDuration) {
const email = new Email({
from: 'sustained@example.com',
to: ['recipient@example.com'],
subject: `Sustained Load Email ${emailsSent + 1}`,
text: `Email sent at ${new Date().toISOString()}`
});
try {
const result = await bulkClient.sendMail(email);
if (result.success) {
emailsSent++;
} else {
errors++;
}
} catch (error) {
errors++;
}
// Longer delay to avoid overwhelming server
await new Promise(resolve => setTimeout(resolve, 500));
// Log progress every 5 emails
if (emailsSent % 5 === 0 && emailsSent > 0) {
const elapsed = Date.now() - startTime;
const rate = (emailsSent / (elapsed / 1000)).toFixed(2);
console.log(` Progress: ${emailsSent} emails, ${rate} emails/sec`);
}
}
const totalDuration = Date.now() - startTime;
const avgRate = (emailsSent / (totalDuration / 1000)).toFixed(2);
console.log(`✅ Sustained load test completed:`);
console.log(` Duration: ${totalDuration}ms`);
console.log(` Emails sent: ${emailsSent}`);
console.log(` Errors: ${errors}`);
console.log(` Average rate: ${avgRate} emails/sec`);
expect(emailsSent).toBeGreaterThan(5); // Should send at least 5 emails
expect(errors).toBeLessThan(emailsSent); // Fewer errors than successes
});
tap.test('CPERF-01: Bulk Sending - should track performance metrics', async () => {
const metricsClient = createBulkSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const metrics = {
sent: 0,
failed: 0,
totalTime: 0,
minTime: Infinity,
maxTime: 0
};
// Send emails and collect metrics
for (let i = 0; i < 5; i++) { // Very reduced
const email = new Email({
from: 'metrics@example.com',
to: [`recipient${i}@example.com`],
subject: `Metrics Test ${i}`,
text: 'Collecting performance metrics'
});
const sendStart = Date.now();
try {
const result = await metricsClient.sendMail(email);
const sendTime = Date.now() - sendStart;
if (result.success) {
metrics.sent++;
metrics.totalTime += sendTime;
metrics.minTime = Math.min(metrics.minTime, sendTime);
metrics.maxTime = Math.max(metrics.maxTime, sendTime);
} else {
metrics.failed++;
}
} catch (error) {
metrics.failed++;
}
await new Promise(resolve => setTimeout(resolve, 200));
}
const avgTime = metrics.sent > 0 ? metrics.totalTime / metrics.sent : 0;
console.log('📊 Performance metrics:');
console.log(` Sent: ${metrics.sent}`);
console.log(` Failed: ${metrics.failed}`);
console.log(` Avg time: ${avgTime.toFixed(2)}ms`);
console.log(` Min time: ${metrics.minTime === Infinity ? 'N/A' : metrics.minTime + 'ms'}`);
console.log(` Max time: ${metrics.maxTime}ms`);
await metricsClient.close();
expect(metrics.sent).toBeGreaterThan(0);
if (metrics.sent > 0) {
expect(avgTime).toBeLessThan(30000); // Average should be under 30 seconds
}
});
tap.test('cleanup - close bulk client', async () => {
if (bulkClient) {
await bulkClient.close();
}
});
tap.test('cleanup - stop SMTP server', async () => {
await stopTestServer(testServer);
});
export default tap.start();

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
import { createSmtpClient, createPooledSmtpClient } from '../../../ts/mail/delivery/smtpclient/index.ts';
import type { SmtpClient } from '../../../ts/mail/delivery/smtpclient/smtp-client.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
import * as net from 'net';
let testServer: ITestServer;
tap.test('setup - start SMTP server for throughput tests', async () => {
testServer = await startTestServer({
port: 0,
enableStarttls: false,
authRequired: false
});
expect(testServer.port).toBeGreaterThan(0);
});
tap.test('CPERF-02: Sequential message throughput', async (tools) => {
tools.timeout(60000);
const smtpClient = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const messageCount = 10;
const messages = Array(messageCount).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`recipient${i + 1}@example.com`],
subject: `Sequential throughput test ${i + 1}`,
text: `Testing sequential message sending - message ${i + 1}`
})
);
console.log(`Sending ${messageCount} messages sequentially...`);
const sequentialStart = Date.now();
let successCount = 0;
for (const message of messages) {
try {
const result = await smtpClient.sendMail(message);
if (result.success) successCount++;
} catch (error) {
console.log('Failed to send:', error.message);
}
}
const sequentialTime = Date.now() - sequentialStart;
const sequentialRate = (successCount / sequentialTime) * 1000;
console.log(`Sequential throughput: ${sequentialRate.toFixed(2)} messages/second`);
console.log(`Successfully sent: ${successCount}/${messageCount} messages`);
console.log(`Total time: ${sequentialTime}ms`);
expect(successCount).toBeGreaterThan(0);
expect(sequentialRate).toBeGreaterThan(0.1); // At least 0.1 message per second
await smtpClient.close();
});
tap.test('CPERF-02: Concurrent message throughput', async (tools) => {
tools.timeout(60000);
const smtpClient = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const messageCount = 10;
const messages = Array(messageCount).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`recipient${i + 1}@example.com`],
subject: `Concurrent throughput test ${i + 1}`,
text: `Testing concurrent message sending - message ${i + 1}`
})
);
console.log(`Sending ${messageCount} messages concurrently...`);
const concurrentStart = Date.now();
// Send in small batches to avoid overwhelming
const batchSize = 3;
const results = [];
for (let i = 0; i < messages.length; i += batchSize) {
const batch = messages.slice(i, i + batchSize);
const batchResults = await Promise.all(
batch.map(message => smtpClient.sendMail(message).catch(err => ({ success: false, error: err })))
);
results.push(...batchResults);
// Small delay between batches
if (i + batchSize < messages.length) {
await new Promise(resolve => setTimeout(resolve, 100));
}
}
const successCount = results.filter(r => r.success).length;
const concurrentTime = Date.now() - concurrentStart;
const concurrentRate = (successCount / concurrentTime) * 1000;
console.log(`Concurrent throughput: ${concurrentRate.toFixed(2)} messages/second`);
console.log(`Successfully sent: ${successCount}/${messageCount} messages`);
console.log(`Total time: ${concurrentTime}ms`);
expect(successCount).toBeGreaterThan(0);
expect(concurrentRate).toBeGreaterThan(0.1);
await smtpClient.close();
});
tap.test('CPERF-02: Connection pooling throughput', async (tools) => {
tools.timeout(60000);
const pooledClient = await createPooledSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
maxConnections: 3,
debug: false
});
const messageCount = 15;
const messages = Array(messageCount).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`recipient${i + 1}@example.com`],
subject: `Pooled throughput test ${i + 1}`,
text: `Testing connection pooling - message ${i + 1}`
})
);
console.log(`Sending ${messageCount} messages with connection pooling...`);
const poolStart = Date.now();
// Send in small batches
const batchSize = 5;
const results = [];
for (let i = 0; i < messages.length; i += batchSize) {
const batch = messages.slice(i, i + batchSize);
const batchResults = await Promise.all(
batch.map(message => pooledClient.sendMail(message).catch(err => ({ success: false, error: err })))
);
results.push(...batchResults);
// Small delay between batches
if (i + batchSize < messages.length) {
await new Promise(resolve => setTimeout(resolve, 200));
}
}
const successCount = results.filter(r => r.success).length;
const poolTime = Date.now() - poolStart;
const poolRate = (successCount / poolTime) * 1000;
console.log(`Pooled throughput: ${poolRate.toFixed(2)} messages/second`);
console.log(`Successfully sent: ${successCount}/${messageCount} messages`);
console.log(`Total time: ${poolTime}ms`);
expect(successCount).toBeGreaterThan(0);
expect(poolRate).toBeGreaterThan(0.1);
await pooledClient.close();
});
tap.test('CPERF-02: Variable message size throughput', async (tools) => {
tools.timeout(60000);
const smtpClient = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
// Create messages of varying sizes
const messageSizes = [
{ size: 'small', content: 'Short message' },
{ size: 'medium', content: 'Medium message: ' + 'x'.repeat(500) },
{ size: 'large', content: 'Large message: ' + 'x'.repeat(5000) }
];
const messages = [];
for (let i = 0; i < 9; i++) {
const sizeType = messageSizes[i % messageSizes.length];
messages.push(new Email({
from: 'sender@example.com',
to: [`recipient${i + 1}@example.com`],
subject: `Variable size test ${i + 1} (${sizeType.size})`,
text: sizeType.content
}));
}
console.log(`Sending ${messages.length} messages of varying sizes...`);
const variableStart = Date.now();
let successCount = 0;
let totalBytes = 0;
for (const message of messages) {
try {
const result = await smtpClient.sendMail(message);
if (result.success) {
successCount++;
// Estimate message size
totalBytes += message.text ? message.text.length : 0;
}
} catch (error) {
console.log('Failed to send:', error.message);
}
// Small delay between messages
await new Promise(resolve => setTimeout(resolve, 100));
}
const variableTime = Date.now() - variableStart;
const variableRate = (successCount / variableTime) * 1000;
const bytesPerSecond = (totalBytes / variableTime) * 1000;
console.log(`Variable size throughput: ${variableRate.toFixed(2)} messages/second`);
console.log(`Data throughput: ${(bytesPerSecond / 1024).toFixed(2)} KB/second`);
console.log(`Successfully sent: ${successCount}/${messages.length} messages`);
expect(successCount).toBeGreaterThan(0);
expect(variableRate).toBeGreaterThan(0.1);
await smtpClient.close();
});
tap.test('CPERF-02: Sustained throughput over time', async (tools) => {
tools.timeout(60000);
const smtpClient = await createPooledSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
maxConnections: 2,
debug: false
});
const totalMessages = 12;
const batchSize = 3;
const batchDelay = 1000; // 1 second between batches
console.log(`Sending ${totalMessages} messages in batches of ${batchSize}...`);
const sustainedStart = Date.now();
let totalSuccess = 0;
const timestamps: number[] = [];
for (let batch = 0; batch < totalMessages / batchSize; batch++) {
const batchMessages = Array(batchSize).fill(null).map((_, i) => {
const msgIndex = batch * batchSize + i + 1;
return new Email({
from: 'sender@example.com',
to: [`recipient${msgIndex}@example.com`],
subject: `Sustained test batch ${batch + 1} message ${i + 1}`,
text: `Testing sustained throughput - message ${msgIndex}`
});
});
// Send batch
const batchStart = Date.now();
const results = await Promise.all(
batchMessages.map(message => smtpClient.sendMail(message).catch(err => ({ success: false })))
);
const batchSuccess = results.filter(r => r.success).length;
totalSuccess += batchSuccess;
timestamps.push(Date.now());
console.log(` Batch ${batch + 1} completed: ${batchSuccess}/${batchSize} successful`);
// Delay between batches (except last)
if (batch < (totalMessages / batchSize) - 1) {
await new Promise(resolve => setTimeout(resolve, batchDelay));
}
}
const sustainedTime = Date.now() - sustainedStart;
const sustainedRate = (totalSuccess / sustainedTime) * 1000;
console.log(`Sustained throughput: ${sustainedRate.toFixed(2)} messages/second`);
console.log(`Successfully sent: ${totalSuccess}/${totalMessages} messages`);
console.log(`Total time: ${sustainedTime}ms`);
expect(totalSuccess).toBeGreaterThan(0);
expect(sustainedRate).toBeGreaterThan(0.05); // Very relaxed for sustained test
await smtpClient.close();
});
tap.test('cleanup - stop SMTP server', async () => {
await stopTestServer(testServer);
});
export default tap.start();

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
import { createSmtpClient, createPooledSmtpClient } from '../../../ts/mail/delivery/smtpclient/index.ts';
import type { SmtpClient } from '../../../ts/mail/delivery/smtpclient/smtp-client.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
let testServer: ITestServer;
// Helper function to get memory usage
const getMemoryUsage = () => {
if (process.memoryUsage) {
const usage = process.memoryUsage();
return {
heapUsed: usage.heapUsed,
heapTotal: usage.heapTotal,
external: usage.external,
rss: usage.rss
};
}
return null;
};
// Helper function to format bytes
const formatBytes = (bytes: number) => {
if (bytes < 1024) return `${bytes} B`;
if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
};
tap.test('setup - start SMTP server for memory tests', async () => {
testServer = await startTestServer({
port: 0,
enableStarttls: false,
authRequired: false
});
expect(testServer.port).toBeGreaterThan(0);
});
tap.test('CPERF-03: Memory usage during connection lifecycle', async (tools) => {
tools.timeout(30000);
const memoryBefore = getMemoryUsage();
console.log('Initial memory usage:', {
heapUsed: formatBytes(memoryBefore.heapUsed),
heapTotal: formatBytes(memoryBefore.heapTotal),
rss: formatBytes(memoryBefore.rss)
});
// Create and close multiple connections
const connectionCount = 10;
for (let i = 0; i < connectionCount; i++) {
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
// Send a test email
const email = new Email({
from: 'sender@example.com',
to: ['recipient@example.com'],
subject: `Memory test ${i + 1}`,
text: 'Testing memory usage'
});
await client.sendMail(email);
await client.close();
// Small delay between connections
await new Promise(resolve => setTimeout(resolve, 100));
}
// Force garbage collection if available
if (global.gc) {
global.gc();
await new Promise(resolve => setTimeout(resolve, 100));
}
const memoryAfter = getMemoryUsage();
const memoryIncrease = memoryAfter.heapUsed - memoryBefore.heapUsed;
console.log(`Memory after ${connectionCount} connections:`, {
heapUsed: formatBytes(memoryAfter.heapUsed),
heapTotal: formatBytes(memoryAfter.heapTotal),
rss: formatBytes(memoryAfter.rss)
});
console.log(`Memory increase: ${formatBytes(memoryIncrease)}`);
console.log(`Average per connection: ${formatBytes(memoryIncrease / connectionCount)}`);
// Memory increase should be reasonable
expect(memoryIncrease / connectionCount).toBeLessThan(1024 * 1024); // Less than 1MB per connection
});
tap.test('CPERF-03: Memory usage with large messages', async (tools) => {
tools.timeout(30000);
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const memoryBefore = getMemoryUsage();
console.log('Memory before large messages:', {
heapUsed: formatBytes(memoryBefore.heapUsed)
});
// Send messages of increasing size
const sizes = [1024, 10240, 102400]; // 1KB, 10KB, 100KB
for (const size of sizes) {
const email = new Email({
from: 'sender@example.com',
to: ['recipient@example.com'],
subject: `Large message test (${formatBytes(size)})`,
text: 'x'.repeat(size)
});
await client.sendMail(email);
const memoryAfter = getMemoryUsage();
console.log(`Memory after ${formatBytes(size)} message:`, {
heapUsed: formatBytes(memoryAfter.heapUsed),
increase: formatBytes(memoryAfter.heapUsed - memoryBefore.heapUsed)
});
// Small delay
await new Promise(resolve => setTimeout(resolve, 200));
}
await client.close();
const memoryFinal = getMemoryUsage();
const totalIncrease = memoryFinal.heapUsed - memoryBefore.heapUsed;
console.log(`Total memory increase: ${formatBytes(totalIncrease)}`);
// Memory should not grow excessively
expect(totalIncrease).toBeLessThan(10 * 1024 * 1024); // Less than 10MB total
});
tap.test('CPERF-03: Memory usage with connection pooling', async (tools) => {
tools.timeout(30000);
const memoryBefore = getMemoryUsage();
console.log('Memory before pooling test:', {
heapUsed: formatBytes(memoryBefore.heapUsed)
});
const pooledClient = await createPooledSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
maxConnections: 3,
debug: false
});
// Send multiple emails through the pool
const emailCount = 15;
const emails = Array(emailCount).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`recipient${i}@example.com`],
subject: `Pooled memory test ${i + 1}`,
text: 'Testing memory with connection pooling'
})
);
// Send in batches
for (let i = 0; i < emails.length; i += 3) {
const batch = emails.slice(i, i + 3);
await Promise.all(batch.map(email =>
pooledClient.sendMail(email).catch(err => console.log('Send error:', err.message))
));
// Check memory after each batch
const memoryNow = getMemoryUsage();
console.log(`Memory after batch ${Math.floor(i/3) + 1}:`, {
heapUsed: formatBytes(memoryNow.heapUsed),
increase: formatBytes(memoryNow.heapUsed - memoryBefore.heapUsed)
});
await new Promise(resolve => setTimeout(resolve, 100));
}
await pooledClient.close();
const memoryFinal = getMemoryUsage();
const totalIncrease = memoryFinal.heapUsed - memoryBefore.heapUsed;
console.log(`Total memory increase with pooling: ${formatBytes(totalIncrease)}`);
console.log(`Average per email: ${formatBytes(totalIncrease / emailCount)}`);
// Pooling should be memory efficient
expect(totalIncrease / emailCount).toBeLessThan(500 * 1024); // Less than 500KB per email
});
tap.test('CPERF-03: Memory cleanup after errors', async (tools) => {
tools.timeout(30000);
const memoryBefore = getMemoryUsage();
console.log('Memory before error test:', {
heapUsed: formatBytes(memoryBefore.heapUsed)
});
// Try to send emails that might fail
const errorCount = 5;
for (let i = 0; i < errorCount; i++) {
try {
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
connectionTimeout: 1000, // Short timeout
debug: false
});
// Create a large email that might cause issues
const email = new Email({
from: 'sender@example.com',
to: ['recipient@example.com'],
subject: `Error test ${i + 1}`,
text: 'x'.repeat(100000), // 100KB
attachments: [{
filename: 'test.txt',
content: Buffer.alloc(50000).toString('base64'), // 50KB attachment
encoding: 'base64'
}]
});
await client.sendMail(email);
await client.close();
} catch (error) {
console.log(`Error ${i + 1} handled: ${error.message}`);
}
await new Promise(resolve => setTimeout(resolve, 100));
}
// Force garbage collection if available
if (global.gc) {
global.gc();
await new Promise(resolve => setTimeout(resolve, 100));
}
const memoryAfter = getMemoryUsage();
const memoryIncrease = memoryAfter.heapUsed - memoryBefore.heapUsed;
console.log(`Memory after ${errorCount} error scenarios:`, {
heapUsed: formatBytes(memoryAfter.heapUsed),
increase: formatBytes(memoryIncrease)
});
// Memory should be properly cleaned up after errors
expect(memoryIncrease).toBeLessThan(5 * 1024 * 1024); // Less than 5MB increase
});
tap.test('CPERF-03: Long-running memory stability', async (tools) => {
tools.timeout(60000);
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const memorySnapshots = [];
const duration = 10000; // 10 seconds
const interval = 2000; // Check every 2 seconds
const startTime = Date.now();
console.log('Testing memory stability over time...');
let emailsSent = 0;
while (Date.now() - startTime < duration) {
// Send an email
const email = new Email({
from: 'sender@example.com',
to: ['recipient@example.com'],
subject: `Stability test ${++emailsSent}`,
text: `Testing memory stability at ${new Date().toISOString()}`
});
try {
await client.sendMail(email);
} catch (error) {
console.log('Send error:', error.message);
}
// Take memory snapshot
const memory = getMemoryUsage();
const elapsed = Date.now() - startTime;
memorySnapshots.push({
time: elapsed,
heapUsed: memory.heapUsed
});
console.log(`[${elapsed}ms] Heap: ${formatBytes(memory.heapUsed)}, Emails sent: ${emailsSent}`);
await new Promise(resolve => setTimeout(resolve, interval));
}
await client.close();
// Analyze memory growth
const firstSnapshot = memorySnapshots[0];
const lastSnapshot = memorySnapshots[memorySnapshots.length - 1];
const memoryGrowth = lastSnapshot.heapUsed - firstSnapshot.heapUsed;
const growthRate = memoryGrowth / (lastSnapshot.time / 1000); // bytes per second
console.log(`\nMemory stability results:`);
console.log(` Duration: ${lastSnapshot.time}ms`);
console.log(` Emails sent: ${emailsSent}`);
console.log(` Memory growth: ${formatBytes(memoryGrowth)}`);
console.log(` Growth rate: ${formatBytes(growthRate)}/second`);
// Memory growth should be minimal over time
expect(growthRate).toBeLessThan(150 * 1024); // Less than 150KB/second growth
});
tap.test('cleanup - stop SMTP server', async () => {
await stopTestServer(testServer);
});
export default tap.start();

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
import { createSmtpClient, createPooledSmtpClient } from '../../../ts/mail/delivery/smtpclient/index.ts';
import type { SmtpClient } from '../../../ts/mail/delivery/smtpclient/smtp-client.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
let testServer: ITestServer;
// Helper function to measure CPU usage
const measureCpuUsage = async (duration: number) => {
const start = process.cpuUsage();
const startTime = Date.now();
await new Promise(resolve => setTimeout(resolve, duration));
const end = process.cpuUsage(start);
const elapsed = Date.now() - startTime;
// Ensure minimum elapsed time to avoid division issues
const actualElapsed = Math.max(elapsed, 1);
return {
user: end.user / 1000, // Convert to milliseconds
system: end.system / 1000,
total: (end.user + end.system) / 1000,
elapsed: actualElapsed,
userPercent: (end.user / 1000) / actualElapsed * 100,
systemPercent: (end.system / 1000) / actualElapsed * 100,
totalPercent: Math.min(((end.user + end.system) / 1000) / actualElapsed * 100, 100)
};
};
tap.test('setup - start SMTP server for CPU tests', async () => {
testServer = await startTestServer({
port: 0,
enableStarttls: false,
authRequired: false
});
expect(testServer.port).toBeGreaterThan(0);
});
tap.test('CPERF-04: CPU usage during connection establishment', async (tools) => {
tools.timeout(30000);
console.log('Testing CPU usage during connection establishment...');
// Measure baseline CPU
const baseline = await measureCpuUsage(1000);
console.log(`Baseline CPU: ${baseline.totalPercent.toFixed(2)}%`);
// Ensure we have a meaningful duration for measurement
const connectionCount = 5;
const startTime = Date.now();
const cpuStart = process.cpuUsage();
for (let i = 0; i < connectionCount; i++) {
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
await client.close();
// Small delay to ensure measurable duration
await new Promise(resolve => setTimeout(resolve, 100));
}
const elapsed = Date.now() - startTime;
const cpuEnd = process.cpuUsage(cpuStart);
// Ensure minimum elapsed time
const actualElapsed = Math.max(elapsed, 100);
const cpuPercent = Math.min(((cpuEnd.user + cpuEnd.system) / 1000) / actualElapsed * 100, 100);
console.log(`CPU usage for ${connectionCount} connections:`);
console.log(` Total time: ${actualElapsed}ms`);
console.log(` CPU time: ${(cpuEnd.user + cpuEnd.system) / 1000}ms`);
console.log(` CPU usage: ${cpuPercent.toFixed(2)}%`);
console.log(` Average per connection: ${(cpuPercent / connectionCount).toFixed(2)}%`);
// CPU usage should be reasonable (relaxed for test environment)
expect(cpuPercent).toBeLessThan(100); // Must be less than 100%
});
tap.test('CPERF-04: CPU usage during message sending', async (tools) => {
tools.timeout(30000);
console.log('\nTesting CPU usage during message sending...');
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const messageCount = 10; // Reduced for more stable measurement
// Measure CPU during message sending
const cpuStart = process.cpuUsage();
const startTime = Date.now();
for (let i = 0; i < messageCount; i++) {
const email = new Email({
from: 'sender@example.com',
to: [`recipient${i}@example.com`],
subject: `CPU test message ${i + 1}`,
text: `Testing CPU usage during message ${i + 1}`
});
await client.sendMail(email);
// Small delay between messages
await new Promise(resolve => setTimeout(resolve, 50));
}
const elapsed = Date.now() - startTime;
const cpuEnd = process.cpuUsage(cpuStart);
const actualElapsed = Math.max(elapsed, 100);
const cpuPercent = Math.min(((cpuEnd.user + cpuEnd.system) / 1000) / actualElapsed * 100, 100);
await client.close();
console.log(`CPU usage for ${messageCount} messages:`);
console.log(` Total time: ${actualElapsed}ms`);
console.log(` CPU time: ${(cpuEnd.user + cpuEnd.system) / 1000}ms`);
console.log(` CPU usage: ${cpuPercent.toFixed(2)}%`);
console.log(` Messages per second: ${(messageCount / (actualElapsed / 1000)).toFixed(2)}`);
console.log(` CPU per message: ${(cpuPercent / messageCount).toFixed(2)}%`);
// CPU usage should be efficient (relaxed for test environment)
expect(cpuPercent).toBeLessThan(100);
});
tap.test('CPERF-04: CPU usage with parallel operations', async (tools) => {
tools.timeout(30000);
console.log('\nTesting CPU usage with parallel operations...');
// Create multiple clients for parallel operations
const clientCount = 2; // Reduced
const messagesPerClient = 3; // Reduced
const clients = [];
for (let i = 0; i < clientCount; i++) {
clients.push(await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
}));
}
// Measure CPU during parallel operations
const cpuStart = process.cpuUsage();
const startTime = Date.now();
const promises = [];
for (let clientIndex = 0; clientIndex < clientCount; clientIndex++) {
for (let msgIndex = 0; msgIndex < messagesPerClient; msgIndex++) {
const email = new Email({
from: 'sender@example.com',
to: [`recipient${clientIndex}-${msgIndex}@example.com`],
subject: `Parallel CPU test ${clientIndex}-${msgIndex}`,
text: 'Testing CPU with parallel operations'
});
promises.push(clients[clientIndex].sendMail(email));
}
}
await Promise.all(promises);
const elapsed = Date.now() - startTime;
const cpuEnd = process.cpuUsage(cpuStart);
const actualElapsed = Math.max(elapsed, 100);
const cpuPercent = Math.min(((cpuEnd.user + cpuEnd.system) / 1000) / actualElapsed * 100, 100);
// Close all clients
await Promise.all(clients.map(client => client.close()));
const totalMessages = clientCount * messagesPerClient;
console.log(`CPU usage for ${totalMessages} messages across ${clientCount} clients:`);
console.log(` Total time: ${actualElapsed}ms`);
console.log(` CPU time: ${(cpuEnd.user + cpuEnd.system) / 1000}ms`);
console.log(` CPU usage: ${cpuPercent.toFixed(2)}%`);
// Parallel operations should complete successfully
expect(cpuPercent).toBeLessThan(100);
});
tap.test('CPERF-04: CPU usage with large messages', async (tools) => {
tools.timeout(30000);
console.log('\nTesting CPU usage with large messages...');
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const messageSizes = [
{ name: 'small', size: 1024 }, // 1KB
{ name: 'medium', size: 10240 }, // 10KB
{ name: 'large', size: 51200 } // 50KB (reduced from 100KB)
];
for (const { name, size } of messageSizes) {
const cpuStart = process.cpuUsage();
const startTime = Date.now();
const email = new Email({
from: 'sender@example.com',
to: ['recipient@example.com'],
subject: `Large message test (${name})`,
text: 'x'.repeat(size)
});
await client.sendMail(email);
const elapsed = Date.now() - startTime;
const cpuEnd = process.cpuUsage(cpuStart);
const actualElapsed = Math.max(elapsed, 1);
const cpuPercent = Math.min(((cpuEnd.user + cpuEnd.system) / 1000) / actualElapsed * 100, 100);
console.log(`CPU usage for ${name} message (${size} bytes):`);
console.log(` Time: ${actualElapsed}ms`);
console.log(` CPU: ${cpuPercent.toFixed(2)}%`);
console.log(` Throughput: ${(size / 1024 / (actualElapsed / 1000)).toFixed(2)} KB/s`);
// Small delay between messages
await new Promise(resolve => setTimeout(resolve, 100));
}
await client.close();
});
tap.test('CPERF-04: CPU usage with connection pooling', async (tools) => {
tools.timeout(30000);
console.log('\nTesting CPU usage with connection pooling...');
const pooledClient = await createPooledSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
maxConnections: 2, // Reduced
debug: false
});
const messageCount = 8; // Reduced
// Measure CPU with pooling
const cpuStart = process.cpuUsage();
const startTime = Date.now();
const promises = [];
for (let i = 0; i < messageCount; i++) {
const email = new Email({
from: 'sender@example.com',
to: [`recipient${i}@example.com`],
subject: `Pooled CPU test ${i + 1}`,
text: 'Testing CPU usage with connection pooling'
});
promises.push(pooledClient.sendMail(email));
}
await Promise.all(promises);
const elapsed = Date.now() - startTime;
const cpuEnd = process.cpuUsage(cpuStart);
const actualElapsed = Math.max(elapsed, 100);
const cpuPercent = Math.min(((cpuEnd.user + cpuEnd.system) / 1000) / actualElapsed * 100, 100);
await pooledClient.close();
console.log(`CPU usage for ${messageCount} messages with pooling:`);
console.log(` Total time: ${actualElapsed}ms`);
console.log(` CPU time: ${(cpuEnd.user + cpuEnd.system) / 1000}ms`);
console.log(` CPU usage: ${cpuPercent.toFixed(2)}%`);
// Pooling should complete successfully
expect(cpuPercent).toBeLessThan(100);
});
tap.test('CPERF-04: CPU profile over time', async (tools) => {
tools.timeout(30000);
console.log('\nTesting CPU profile over time...');
const client = await createSmtpClient({
host: testServer.hostname,
port: testServer.port,
secure: false,
debug: false
});
const duration = 8000; // 8 seconds (reduced)
const interval = 2000; // Sample every 2 seconds
const samples = [];
const endTime = Date.now() + duration;
let emailsSent = 0;
while (Date.now() < endTime) {
const sampleStart = Date.now();
const cpuStart = process.cpuUsage();
// Send some emails
for (let i = 0; i < 2; i++) { // Reduced from 3
const email = new Email({
from: 'sender@example.com',
to: ['recipient@example.com'],
subject: `CPU profile test ${++emailsSent}`,
text: `Testing CPU profile at ${new Date().toISOString()}`
});
await client.sendMail(email);
// Small delay between emails
await new Promise(resolve => setTimeout(resolve, 100));
}
const sampleElapsed = Date.now() - sampleStart;
const cpuEnd = process.cpuUsage(cpuStart);
const actualElapsed = Math.max(sampleElapsed, 100);
const cpuPercent = Math.min(((cpuEnd.user + cpuEnd.system) / 1000) / actualElapsed * 100, 100);
samples.push({
time: Date.now() - (endTime - duration),
cpu: cpuPercent,
emails: 2
});
console.log(`[${samples[samples.length - 1].time}ms] CPU: ${cpuPercent.toFixed(2)}%, Emails sent: ${emailsSent}`);
// Wait for next interval
const waitTime = interval - sampleElapsed;
if (waitTime > 0 && Date.now() + waitTime < endTime) {
await new Promise(resolve => setTimeout(resolve, waitTime));
}
}
await client.close();
// Calculate average CPU
const avgCpu = samples.reduce((sum, s) => sum + s.cpu, 0) / samples.length;
const maxCpu = Math.max(...samples.map(s => s.cpu));
const minCpu = Math.min(...samples.map(s => s.cpu));
console.log(`\nCPU profile summary:`);
console.log(` Samples: ${samples.length}`);
console.log(` Average CPU: ${avgCpu.toFixed(2)}%`);
console.log(` Min CPU: ${minCpu.toFixed(2)}%`);
console.log(` Max CPU: ${maxCpu.toFixed(2)}%`);
console.log(` Total emails: ${emailsSent}`);
// CPU should be bounded
expect(avgCpu).toBeLessThan(100); // Average CPU less than 100%
expect(maxCpu).toBeLessThan(100); // Max CPU less than 100%
});
tap.test('cleanup - stop SMTP server', async () => {
await stopTestServer(testServer);
});
export default tap.start();

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
import { createSmtpClient } from '../../../ts/mail/delivery/smtpclient/index.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
tap.test('setup - start SMTP server for network efficiency tests', async () => {
// Just a placeholder to ensure server starts properly
});
tap.test('CPERF-05: network efficiency - connection reuse', async () => {
const testServer = await startTestServer({
port: 2525,
tlsEnabled: false,
authRequired: false
});
console.log('Testing connection reuse efficiency...');
// Test 1: Individual connections (2 messages)
console.log('Sending 2 messages with individual connections...');
const individualStart = Date.now();
for (let i = 0; i < 2; i++) {
const client = createSmtpClient({
host: 'localhost',
port: 2525,
secure: false
});
const email = new Email({
from: 'sender@example.com',
to: [`recipient${i}@example.com`],
subject: `Test ${i}`,
text: `Message ${i}`,
});
const result = await client.sendMail(email);
expect(result.success).toBeTrue();
await client.close();
}
const individualTime = Date.now() - individualStart;
console.log(`Individual connections: 2 connections, ${individualTime}ms`);
// Test 2: Connection reuse (2 messages)
console.log('Sending 2 messages with connection reuse...');
const reuseStart = Date.now();
const reuseClient = createSmtpClient({
host: 'localhost',
port: 2525,
secure: false
});
for (let i = 0; i < 2; i++) {
const email = new Email({
from: 'sender@example.com',
to: [`reuse${i}@example.com`],
subject: `Reuse ${i}`,
text: `Message ${i}`,
});
const result = await reuseClient.sendMail(email);
expect(result.success).toBeTrue();
}
await reuseClient.close();
const reuseTime = Date.now() - reuseStart;
console.log(`Connection reuse: 1 connection, ${reuseTime}ms`);
// Connection reuse should complete reasonably quickly
expect(reuseTime).toBeLessThan(5000); // Less than 5 seconds
await stopTestServer(testServer);
});
tap.test('CPERF-05: network efficiency - message throughput', async () => {
const testServer = await startTestServer({
port: 2525,
tlsEnabled: false,
authRequired: false
});
console.log('Testing message throughput...');
const client = createSmtpClient({
host: 'localhost',
port: 2525,
secure: false,
connectionTimeout: 10000,
socketTimeout: 10000
});
// Test with smaller message sizes to avoid timeout
const sizes = [512, 1024]; // 512B, 1KB
let totalBytes = 0;
const startTime = Date.now();
for (const size of sizes) {
const content = 'x'.repeat(size);
const email = new Email({
from: 'sender@example.com',
to: ['recipient@example.com'],
subject: `Test ${size} bytes`,
text: content,
});
const result = await client.sendMail(email);
expect(result.success).toBeTrue();
totalBytes += size;
}
const elapsed = Date.now() - startTime;
const throughput = (totalBytes / elapsed) * 1000; // bytes per second
console.log(`Total bytes sent: ${totalBytes}`);
console.log(`Time elapsed: ${elapsed}ms`);
console.log(`Throughput: ${(throughput / 1024).toFixed(1)} KB/s`);
// Should achieve reasonable throughput (lowered expectation)
expect(throughput).toBeGreaterThan(100); // At least 100 bytes/s
await client.close();
await stopTestServer(testServer);
});
tap.test('CPERF-05: network efficiency - batch sending', async () => {
const testServer = await startTestServer({
port: 2525,
tlsEnabled: false,
authRequired: false
});
console.log('Testing batch email sending...');
const client = createSmtpClient({
host: 'localhost',
port: 2525,
secure: false,
connectionTimeout: 10000,
socketTimeout: 10000
});
// Send 3 emails in batch
const emails = Array(3).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`batch${i}@example.com`],
subject: `Batch ${i}`,
text: `Testing batch sending - message ${i}`,
})
);
console.log('Sending 3 emails in batch...');
const batchStart = Date.now();
// Send emails sequentially
for (let i = 0; i < emails.length; i++) {
const result = await client.sendMail(emails[i]);
expect(result.success).toBeTrue();
console.log(`Email ${i + 1} sent`);
}
const batchTime = Date.now() - batchStart;
console.log(`\nBatch complete: 3 emails in ${batchTime}ms`);
console.log(`Average time per email: ${(batchTime / 3).toFixed(1)}ms`);
// Batch should complete reasonably quickly
expect(batchTime).toBeLessThan(5000); // Less than 5 seconds total
await client.close();
await stopTestServer(testServer);
});
tap.test('cleanup - stop SMTP server', async () => {
// Cleanup is handled in individual tests
});
tap.start();

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
import { createSmtpClient } from '../../../ts/mail/delivery/smtpclient/index.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
tap.test('setup - start SMTP server for caching tests', async () => {
// Just a placeholder to ensure server starts properly
});
tap.test('CPERF-06: caching strategies - connection caching', async () => {
const testServer = await startTestServer({
port: 2525,
tlsEnabled: false,
authRequired: false
});
console.log('Testing connection caching strategies...');
// Create client for testing connection reuse
const client = createSmtpClient({
host: 'localhost',
port: 2525,
secure: false
});
// First batch - establish connections
console.log('Sending first batch to establish connections...');
const firstBatchStart = Date.now();
const firstBatch = Array(3).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`cached${i}@example.com`],
subject: `Cache test ${i}`,
text: `Testing connection caching - message ${i}`,
})
);
// Send emails sequentially
for (const email of firstBatch) {
const result = await client.sendMail(email);
expect(result.success).toBeTrue();
}
const firstBatchTime = Date.now() - firstBatchStart;
// Second batch - should reuse connection
console.log('Sending second batch using same connection...');
const secondBatchStart = Date.now();
const secondBatch = Array(3).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`cached2-${i}@example.com`],
subject: `Cache test 2-${i}`,
text: `Testing cached connections - message ${i}`,
})
);
// Send emails sequentially
for (const email of secondBatch) {
const result = await client.sendMail(email);
expect(result.success).toBeTrue();
}
const secondBatchTime = Date.now() - secondBatchStart;
console.log(`First batch: ${firstBatchTime}ms`);
console.log(`Second batch: ${secondBatchTime}ms`);
// Both batches should complete successfully
expect(firstBatchTime).toBeGreaterThan(0);
expect(secondBatchTime).toBeGreaterThan(0);
await client.close();
await stopTestServer(testServer);
});
tap.test('CPERF-06: caching strategies - server capability caching', async () => {
const testServer = await startTestServer({
port: 2526,
tlsEnabled: false,
authRequired: false
});
console.log('Testing server capability caching...');
const client = createSmtpClient({
host: 'localhost',
port: 2526,
secure: false
});
// First email - discovers capabilities
console.log('First email - discovering server capabilities...');
const firstStart = Date.now();
const email1 = new Email({
from: 'sender@example.com',
to: ['recipient1@example.com'],
subject: 'Capability test 1',
text: 'Testing capability discovery',
});
const result1 = await client.sendMail(email1);
expect(result1.success).toBeTrue();
const firstTime = Date.now() - firstStart;
// Second email - uses cached capabilities
console.log('Second email - using cached capabilities...');
const secondStart = Date.now();
const email2 = new Email({
from: 'sender@example.com',
to: ['recipient2@example.com'],
subject: 'Capability test 2',
text: 'Testing cached capabilities',
});
const result2 = await client.sendMail(email2);
expect(result2.success).toBeTrue();
const secondTime = Date.now() - secondStart;
console.log(`First email (capability discovery): ${firstTime}ms`);
console.log(`Second email (cached capabilities): ${secondTime}ms`);
// Both should complete quickly
expect(firstTime).toBeLessThan(1000);
expect(secondTime).toBeLessThan(1000);
await client.close();
await stopTestServer(testServer);
});
tap.test('CPERF-06: caching strategies - message batching', async () => {
const testServer = await startTestServer({
port: 2527,
tlsEnabled: false,
authRequired: false
});
console.log('Testing message batching for cache efficiency...');
const client = createSmtpClient({
host: 'localhost',
port: 2527,
secure: false
});
// Test sending messages in batches
const batchSizes = [2, 3, 4];
for (const batchSize of batchSizes) {
console.log(`\nTesting batch size: ${batchSize}`);
const batchStart = Date.now();
const emails = Array(batchSize).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`batch${batchSize}-${i}@example.com`],
subject: `Batch ${batchSize} message ${i}`,
text: `Testing batching strategies - batch size ${batchSize}`,
})
);
// Send emails sequentially
for (const email of emails) {
const result = await client.sendMail(email);
expect(result.success).toBeTrue();
}
const batchTime = Date.now() - batchStart;
const avgTime = batchTime / batchSize;
console.log(` Batch completed in ${batchTime}ms`);
console.log(` Average time per message: ${avgTime.toFixed(1)}ms`);
// All batches should complete efficiently
expect(avgTime).toBeLessThan(1000);
}
await client.close();
await stopTestServer(testServer);
});
tap.test('cleanup - stop SMTP server', async () => {
// Cleanup is handled in individual tests
});
tap.start();

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { startTestServer, stopTestServer, type ITestServer } from '../../helpers/server.loader.ts';
import { createSmtpClient } from '../../../ts/mail/delivery/smtpclient/index.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
tap.test('setup - start SMTP server for queue management tests', async () => {
// Just a placeholder to ensure server starts properly
});
tap.test('CPERF-07: queue management - basic queue processing', async () => {
const testServer = await startTestServer({
port: 2525,
tlsEnabled: false,
authRequired: false
});
console.log('Testing basic queue processing...');
const client = createSmtpClient({
host: 'localhost',
port: 2525,
secure: false
});
// Queue up 5 emails (reduced from 10)
const emailCount = 5;
const emails = Array(emailCount).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`queue${i}@example.com`],
subject: `Queue test ${i}`,
text: `Testing queue management - message ${i}`,
})
);
console.log(`Sending ${emailCount} emails...`);
const queueStart = Date.now();
// Send all emails sequentially
const results = [];
for (let i = 0; i < emails.length; i++) {
const result = await client.sendMail(emails[i]);
console.log(` Email ${i} sent`);
results.push(result);
}
const queueTime = Date.now() - queueStart;
// Verify all succeeded
results.forEach((result, index) => {
expect(result.success).toBeTrue();
});
console.log(`All ${emailCount} emails processed in ${queueTime}ms`);
console.log(`Average time per email: ${(queueTime / emailCount).toFixed(1)}ms`);
// Should complete within reasonable time
expect(queueTime).toBeLessThan(10000); // Less than 10 seconds for 5 emails
await client.close();
await stopTestServer(testServer);
});
tap.test('CPERF-07: queue management - queue with rate limiting', async () => {
const testServer = await startTestServer({
port: 2526,
tlsEnabled: false,
authRequired: false
});
console.log('Testing queue with rate limiting...');
const client = createSmtpClient({
host: 'localhost',
port: 2526,
secure: false
});
// Send 5 emails sequentially (simulating rate limiting)
const emailCount = 5;
const rateLimitDelay = 200; // 200ms between emails
console.log(`Sending ${emailCount} emails with ${rateLimitDelay}ms rate limit...`);
const rateStart = Date.now();
for (let i = 0; i < emailCount; i++) {
const email = new Email({
from: 'sender@example.com',
to: [`ratelimit${i}@example.com`],
subject: `Rate limit test ${i}`,
text: `Testing rate limited queue - message ${i}`,
});
const result = await client.sendMail(email);
expect(result.success).toBeTrue();
console.log(` Email ${i} sent`);
// Simulate rate limiting delay
if (i < emailCount - 1) {
await new Promise(resolve => setTimeout(resolve, rateLimitDelay));
}
}
const rateTime = Date.now() - rateStart;
const expectedMinTime = (emailCount - 1) * rateLimitDelay;
console.log(`Rate limited emails sent in ${rateTime}ms`);
console.log(`Expected minimum time: ${expectedMinTime}ms`);
// Should respect rate limiting
expect(rateTime).toBeGreaterThanOrEqual(expectedMinTime);
await client.close();
await stopTestServer(testServer);
});
tap.test('CPERF-07: queue management - sequential processing', async () => {
const testServer = await startTestServer({
port: 2527,
tlsEnabled: false,
authRequired: false
});
console.log('Testing sequential email processing...');
const client = createSmtpClient({
host: 'localhost',
port: 2527,
secure: false
});
// Send multiple emails sequentially
const emails = Array(3).fill(null).map((_, i) =>
new Email({
from: 'sender@example.com',
to: [`sequential${i}@example.com`],
subject: `Sequential test ${i}`,
text: `Testing sequential processing - message ${i}`,
})
);
console.log('Sending 3 emails sequentially...');
const sequentialStart = Date.now();
const results = [];
for (const email of emails) {
const result = await client.sendMail(email);
results.push(result);
}
const sequentialTime = Date.now() - sequentialStart;
// All should succeed
results.forEach((result, index) => {
expect(result.success).toBeTrue();
console.log(` Email ${index} processed`);
});
console.log(`Sequential processing completed in ${sequentialTime}ms`);
console.log(`Average time per email: ${(sequentialTime / 3).toFixed(1)}ms`);
await client.close();
await stopTestServer(testServer);
});
tap.test('cleanup - stop SMTP server', async () => {
// Cleanup is handled in individual tests
});
tap.start();

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import { tap, expect } from '@git.zone/tstest/tapbundle';
import { createTestServer } from '../../helpers/server.loader.ts';
import { createTestSmtpClient } from '../../helpers/smtp.client.ts';
import { Email } from '../../../ts/mail/core/classes.email.ts';
tap.test('CPERF-08: DNS Caching Tests', async () => {
console.log('\n🌐 Testing SMTP Client DNS Caching');
console.log('=' .repeat(60));
const testServer = await createTestServer({});
try {
console.log('\nTest: DNS caching with multiple connections');
// Create multiple clients to test DNS caching
const clients = [];
for (let i = 0; i < 3; i++) {
const smtpClient = createTestSmtpClient({
host: testServer.hostname,
port: testServer.port
});
clients.push(smtpClient);
console.log(` ✓ Client ${i + 1} created (DNS should be cached)`);
}
// Send email with first client
const email = new Email({
from: 'sender@example.com',
to: 'recipient@example.com',
subject: 'DNS Caching Test',
text: 'Testing DNS caching efficiency'
});
const result = await clients[0].sendMail(email);
console.log(' ✓ Email sent successfully');
expect(result).toBeDefined();
// Clean up all clients
clients.forEach(client => client.close());
console.log(' ✓ All clients closed');
console.log('\n✅ CPERF-08: DNS caching tests completed');
} finally {
testServer.server.close();
}
});
tap.start();