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/**
* Test script for WebSocket signaling protocol
*
* Tests:
* 1. Peer registration
* 2. Offer relay from peer A to peer B
* 3. Answer relay from peer B to peer A
* 4. ICE candidate relay
* 5. Error cases (malformed messages, unregistered peers, duplicate IDs, spoofed from)
*/
import WebSocket from 'ws';
import { randomUUID } from 'node:crypto';
const SERVER_URL = 'ws://localhost:6736';
const TIMEOUT = 5000; // 5 second timeout per test
// Test results
const results = {
passed: 0,
failed: 0,
tests: []
};
// Every test gets fresh peer IDs. Tests used to share a fixed pair, so a test
// could try to register an ID while the previous test's socket was still being
// torn down server-side -- the server correctly answered "already registered"
// and the test timed out waiting for "registered". Unique IDs remove the
// collision entirely rather than relying on cleanup winning the race.
function newPeerId() {
return randomUUID();
}
// ws.close() only *starts* the closing handshake. Waiting for the socket to
// actually reach CLOSED keeps sockets from piling up across tests.
function closeAll(...sockets) {
return Promise.all(sockets.map((ws) => new Promise((resolve) => {
if (!ws || ws.readyState === WebSocket.CLOSED) {
resolve();
return;
}
const done = setTimeout(resolve, TIMEOUT); // never hang teardown
ws.once('close', () => {
clearTimeout(done);
resolve();
});
ws.close();
})));
}
// Utility: Create WebSocket connection and wait for it to be ready
async function createConnection() {
const ws = new WebSocket(SERVER_URL);
// Set up message listener immediately (before connection opens)
const welcomePromise = new Promise((resolve, reject) => {
const timeout = setTimeout(() => {
reject(new Error('Timeout waiting for welcome message'));
}, TIMEOUT);
function messageHandler(data) {
try {
const message = JSON.parse(data.toString());
if (message.type === 'welcome') {
clearTimeout(timeout);
ws.off('message', messageHandler);
resolve(message);
}
} catch (error) {
// Ignore parse errors, wait for next message
}
}
ws.on('message', messageHandler);
});
// Wait for connection to open
await new Promise((resolve, reject) => {
if (ws.readyState === WebSocket.OPEN) {
resolve();
return;
}
const timeout = setTimeout(() => {
reject(new Error('Connection timeout'));
}, TIMEOUT);
ws.once('open', () => {
clearTimeout(timeout);
resolve();
});
ws.once('error', (error) => {
clearTimeout(timeout);
reject(error);
});
});
// Wait for welcome message
await welcomePromise;
return ws;
}
// Utility: Wait for specific message type
function waitForMessage(ws, expectedType, timeoutMs = TIMEOUT) {
return new Promise((resolve, reject) => {
const timeout = setTimeout(() => {
reject(new Error(`Timeout waiting for message type: ${expectedType}`));
}, timeoutMs);
function messageHandler(data) {
try {
const message = JSON.parse(data.toString());
if (message.type === expectedType) {
clearTimeout(timeout);
ws.off('message', messageHandler);
resolve(message);
}
} catch (error) {
// Ignore parse errors, wait for next message
}
}
ws.on('message', messageHandler);
});
}
// Utility: Send message and wait for response
function sendAndWaitFor(ws, message, expectedType) {
const promise = waitForMessage(ws, expectedType);
ws.send(JSON.stringify(message));
return promise;
}
// Test runner
async function runTest(name, testFn) {
try {
console.log(`\n🧪 TEST: ${name}`);
await testFn();
console.log(`✅ PASS: ${name}`);
results.passed++;
results.tests.push({ name, status: 'PASS' });
} catch (error) {
console.log(`❌ FAIL: ${name}`);
console.log(` Error: ${error.message}`);
results.failed++;
results.tests.push({ name, status: 'FAIL', error: error.message });
}
}
// ============================================================================
// TEST CASES
// ============================================================================
// Test 1: Peer registration
async function testPeerRegistration() {
const id = newPeerId();
const ws = await createConnection();
// Register peer
const response = await sendAndWaitFor(ws, {
type: 'register',
peerId: id
}, 'registered');
if (response.peerId !== id) {
throw new Error('Peer ID mismatch in response');
}
await closeAll(ws);
}
// Test 2: Duplicate peer ID rejection
async function testDuplicatePeerIdRejection() {
const id = newPeerId();
const [ws1, ws2] = await Promise.all([
createConnection(),
createConnection()
]);
// Register first peer
await sendAndWaitFor(ws1, {
type: 'register',
peerId: id
}, 'registered');
// Try to register second peer with same ID
const errorResponse = await sendAndWaitFor(ws2, {
type: 'register',
peerId: id
}, 'error');
if (!errorResponse.message.includes('already registered')) {
throw new Error('Expected error message about duplicate peer ID');
}
await closeAll(ws1, ws2);
}
// Test 3: Offer relay from peer A to peer B
async function testOfferRelay() {
const idA = newPeerId();
const idB = newPeerId();
const [peerA, peerB] = await Promise.all([
createConnection(),
createConnection()
]);
// Register both peers
await Promise.all([
sendAndWaitFor(peerA, { type: 'register', peerId: idA }, 'registered'),
sendAndWaitFor(peerB, { type: 'register', peerId: idB }, 'registered')
]);
// Send offer from A to B (peerB should receive it)
const offerMessage = {
type: 'offer',
from: idA,
to: idB,
sdp: 'v=0\r\no=- 123456 2 IN IP4 127.0.0.1\r\n...'
};
// Set up listener on peerB before sending
const receivedOfferPromise = waitForMessage(peerB, 'offer');
peerA.send(JSON.stringify(offerMessage));
const receivedOffer = await receivedOfferPromise;
// Verify peer B received the exact offer
if (receivedOffer.from !== idA) {
throw new Error('Offer "from" field mismatch');
}
if (receivedOffer.to !== idB) {
throw new Error('Offer "to" field mismatch');
}
if (receivedOffer.sdp !== offerMessage.sdp) {
throw new Error('Offer SDP mismatch');
}
await closeAll(peerA, peerB);
}
// Test 4: Answer relay from peer B to peer A
async function testAnswerRelay() {
const idA = newPeerId();
const idB = newPeerId();
const [peerA, peerB] = await Promise.all([
createConnection(),
createConnection()
]);
// Register both peers
await Promise.all([
sendAndWaitFor(peerA, { type: 'register', peerId: idA }, 'registered'),
sendAndWaitFor(peerB, { type: 'register', peerId: idB }, 'registered')
]);
// Send answer from B to A (peerA should receive it)
const answerMessage = {
type: 'answer',
from: idB,
to: idA,
sdp: 'v=0\r\no=- 789012 2 IN IP4 127.0.0.1\r\n...'
};
// Set up listener on peerA before sending
const receivedAnswerPromise = waitForMessage(peerA, 'answer');
peerB.send(JSON.stringify(answerMessage));
const receivedAnswer = await receivedAnswerPromise;
// Verify peer A received the exact answer
if (receivedAnswer.from !== idB) {
throw new Error('Answer "from" field mismatch');
}
if (receivedAnswer.to !== idA) {
throw new Error('Answer "to" field mismatch');
}
if (receivedAnswer.sdp !== answerMessage.sdp) {
throw new Error('Answer SDP mismatch');
}
await closeAll(peerA, peerB);
}
// Test 5: ICE candidate relay
async function testIceCandidateRelay() {
const idA = newPeerId();
const idB = newPeerId();
const [peerA, peerB] = await Promise.all([
createConnection(),
createConnection()
]);
// Register both peers
await Promise.all([
sendAndWaitFor(peerA, { type: 'register', peerId: idA }, 'registered'),
sendAndWaitFor(peerB, { type: 'register', peerId: idB }, 'registered')
]);
// Send ICE candidate from A to B (peerB should receive it)
const candidateMessage = {
type: 'ice-candidate',
from: idA,
to: idB,
candidate: {
candidate: 'candidate:1 1 UDP 2130706431 192.168.1.100 54321 typ host',
sdpMLineIndex: 0,
sdpMid: 'audio'
}
};
// Set up listener on peerB before sending
const receivedCandidatePromise = waitForMessage(peerB, 'ice-candidate');
peerA.send(JSON.stringify(candidateMessage));
const receivedCandidate = await receivedCandidatePromise;
// Verify peer B received the candidate
if (receivedCandidate.from !== idA) {
throw new Error('Candidate "from" field mismatch');
}
if (receivedCandidate.to !== idB) {
throw new Error('Candidate "to" field mismatch');
}
if (JSON.stringify(receivedCandidate.candidate) !== JSON.stringify(candidateMessage.candidate)) {
throw new Error('Candidate data mismatch');
}
await closeAll(peerA, peerB);
}
// Test 6: Unregistered peer cannot send offer
async function testUnregisteredPeerRejection() {
const idA = newPeerId();
const idB = newPeerId();
const ws = await createConnection();
// Try to send offer without registering
const errorResponse = await sendAndWaitFor(ws, {
type: 'offer',
from: idA,
to: idB,
sdp: 'v=0...'
}, 'error');
if (!errorResponse.message.includes('must register')) {
throw new Error('Expected error about peer not being registered');
}
await closeAll(ws);
}
// Test 7: Target peer not found
async function testTargetPeerNotFound() {
const idA = newPeerId();
const peerA = await createConnection();
// Register peer A
await sendAndWaitFor(peerA, { type: 'register', peerId: idA }, 'registered');
// Send offer to non-existent peer
const errorResponse = await sendAndWaitFor(peerA, {
type: 'offer',
from: idA,
to: 'non-existent-peer',
sdp: 'v=0...'
}, 'error');
if (!errorResponse.message.includes('not connected')) {
throw new Error('Expected error about target peer not connected');
}
await closeAll(peerA);
}
// Test 8: Spoofed "from" field rejection
async function testSpoofedFromRejection() {
const idA = newPeerId();
const idB = newPeerId();
const peerA = await createConnection();
// Register peer A
await sendAndWaitFor(peerA, { type: 'register', peerId: idA }, 'registered');
// Try to send offer with spoofed "from" field
const errorResponse = await sendAndWaitFor(peerA, {
type: 'offer',
from: idB, // Spoofed!
to: 'peer-c',
sdp: 'v=0...'
}, 'error');
if (!errorResponse.message.includes('must match registered peer ID')) {
throw new Error('Expected error about "from" field not matching peer ID');
}
await closeAll(peerA);
}
// Test 9: Malformed message (missing required fields)
async function testMalformedMessage() {
const idA = newPeerId();
const idB = newPeerId();
const ws = await createConnection();
// Register peer
await sendAndWaitFor(ws, { type: 'register', peerId: idA }, 'registered');
// Send malformed offer (missing sdp)
const errorResponse = await sendAndWaitFor(ws, {
type: 'offer',
from: idA,
to: idB
// Missing: sdp
}, 'error');
if (!errorResponse.message.includes('sdp')) {
throw new Error('Expected error about missing sdp field');
}
await closeAll(ws);
}
// ============================================================================
// RUN ALL TESTS
// ============================================================================
async function runAllTests() {
console.log('========================================');
console.log('WebSocket Signaling Protocol Tests');
console.log('========================================');
await runTest('1. Peer registration', testPeerRegistration);
await runTest('2. Duplicate peer ID rejection', testDuplicatePeerIdRejection);
await runTest('3. Offer relay from peer A to peer B', testOfferRelay);
await runTest('4. Answer relay from peer B to peer A', testAnswerRelay);
await runTest('5. ICE candidate relay', testIceCandidateRelay);
await runTest('6. Unregistered peer cannot send offer', testUnregisteredPeerRejection);
await runTest('7. Target peer not found error', testTargetPeerNotFound);
await runTest('8. Spoofed "from" field rejection', testSpoofedFromRejection);
await runTest('9. Malformed message rejection', testMalformedMessage);
// Print summary
console.log('\n========================================');
console.log('Test Summary');
console.log('========================================');
console.log(`Total: ${results.passed + results.failed}`);
console.log(`✅ Passed: ${results.passed}`);
console.log(`❌ Failed: ${results.failed}`);
if (results.failed > 0) {
console.log('\nFailed tests:');
results.tests
.filter(t => t.status === 'FAIL')
.forEach(t => console.log(` - ${t.name}: ${t.error}`));
}
console.log('========================================\n');
// Exit with appropriate code
process.exit(results.failed > 0 ? 1 : 0);
}
// Run tests
runAllTests().catch((error) => {
console.error('Fatal error running tests:', error);
process.exit(1);
});
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