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2026-07-29 16:01
WebSocket

Connection Close Codes

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Description

Handle different WebSocket close codes (1000, 1001, 1006) and verify proper cleanup.

Test Scenario

// Test: Graceful close with code 1000
const ws = new WebSocket('wss://echo.websocket.org');
await waitFor(() => ws.readyState === WebSocket.OPEN);

let closeCode = 0;
ws.onclose = (e) => { closeCode = e.code; };
ws.close(1000, 'Normal closure');

await waitFor(() => ws.readyState === WebSocket.CLOSED);
expect(closeCode).toBe(1000);

Testing Tips

  • •Close code 1000 = normal closure
  • •Close code 1001 = going away
  • •Close code 1006 = abnormal closure
// Playwright API Testing - WebSocket
import { test, expect } from '@playwright/test';


test('WebSocket connection', async ({ page }) => {
  // Listen for WebSocket connections
  const wsPromise = page.waitForEvent('websocket');


  await page.goto('/websocket-demo');


  const ws = await wsPromise;
  expect(ws.url()).toContain('ws://');


  // Wait for message
  const framePromise = ws.waitForEvent('framereceived');
  const frame = await framePromise;
  expect(frame.payload).toBeDefined();
});

Challenge ID: ws-close-codes

2 frameworks available