WebSocket Testing in Postman: Myths of the North

Open, drive and close a WebSocket connection in Postman and read the handshake, frames and close codes. Test a live stream, write checks on incoming messages, and tell WebSocket from SSE, webhooks and MQTT.

29 lessons · 372 stepscertificate

Course program

The full outline. Lessons open when the course does.

The rainbow bridge: how real-time works

Welcome to the North9 steps

Polling: asking the server again and again11 steps

Handshake and 10113 steps

Frames and messages12 steps

ws:// and wss://12 steps

WebSocket vs REST12 steps

Where WebSocket lives13 steps

Gjallarhorn: WebSocket in Postman

First connection12 steps

Send and receive13 steps

Params and headers12 steps

Collections and documentation13 steps

Socket.IO13 steps

The live stream

Subscriptions11 steps

Authorization12 steps

Variables and environments13 steps

Ping, pong and reconnecting13 steps

Close codes12 steps

The frost trial: testing WebSocket

WebSocket checklist15 steps

Checks on incoming messages11 steps

Negative scenarios13 steps

Async test design15 steps

Frames in DevTools13 steps

Runner and alternatives15 steps

Neighboring streams

SSE in Postman13 steps

SSE vs WebSocket14 steps

Webhooks: the call back and how to test it12 steps

MQTT at a glance14 steps

The feast in Valhalla: final

Final chat project14 steps

Back at Shelf17 steps

The author

Artsiom Rusau – QA engineer and course author. He has tested software since 2019 and has taught software testing since 2020.

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