API Testing

WebSockets and Server-Sent Events both push data to a browser, but they solve different problems. How to choose, and how to test whichever one you pick.

Send queries and mutations, handle the errors array, use introspection instead of guessing field names, and validate GraphQL responses properly.

The status codes that actually come up when you are debugging an API, what each one is really telling you, and which are routinely misused.