Real-Time Features Testing Checklist
Real-time features like live chat, notifications, and collaborative editing require reliable persistent connections. AI-generated real-time code frequently drops connections, loses messages, and fails to sync state between clients. This checklist ensures your real-time features work reliably.
Last updated: 2026-03-14
Connection Management
WebSocket connection establishes successfully
Open the app and verify that the WebSocket or SSE connection is established without errors in the console.
Connection recovers after network interruption
Disconnect from the network briefly and reconnect, then verify the real-time connection re-establishes automatically.
Connection handles server restarts gracefully
Restart the server and verify connected clients reconnect automatically without requiring a page refresh.
Multiple tabs handle connections correctly
Open the app in multiple tabs and verify that real-time updates work in all tabs without duplicate messages.
Message Delivery
Messages are delivered in order
Send several messages in quick succession and verify they arrive at the recipient in the correct order.
No messages are lost during high volume
Send many messages rapidly and verify every message is received by all intended recipients.
Messages sent during disconnection are handled
Send a message while disconnected and verify it is either queued for delivery or the user is notified of failure.
Large messages are handled without truncation
Send messages with substantial content and verify they arrive complete without being cut off.
State Synchronization
UI updates reflect real-time changes immediately
Make a change from one client and verify it appears on other connected clients within 1-2 seconds.
State is consistent after reconnection
Disconnect, make changes from another client, reconnect, and verify the state catches up correctly.
Conflicting edits are resolved
If your app supports collaborative editing, make conflicting changes from two clients and verify a reasonable resolution.
Presence indicators update correctly
If your app shows who is online, verify indicators update when users join, leave, and go idle.
Historical data loads before real-time begins
Open the app and verify that existing data loads before real-time updates start appending new data.
Performance Under Load
Real-time features work with many connected users
Test with multiple simultaneous users and verify that message delivery and updates remain fast and reliable.
UI remains responsive during rapid updates
Trigger many rapid real-time updates and verify the browser tab does not freeze or become sluggish.
Memory usage stays stable over time
Leave the app open with active real-time features for an extended period and verify memory usage does not grow unbounded.
Notification sounds and visual indicators work
Verify that notification sounds play, badge counts update, and visual indicators appear for new real-time events.
Frequently Asked Questions
How do I test real-time features with multiple users?
Open the app in multiple browser windows or tabs logged in as different users. Alternatively, use a second device. This simulates multi-user interaction for testing real-time message delivery and state sync.
What is the difference between WebSocket and SSE testing?
WebSocket supports bidirectional communication while Server-Sent Events are one-directional from server to client. Test WebSocket apps for both sending and receiving. Test SSE apps for receiving updates and verify sending works through regular HTTP requests.
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