Testing payload structure using JSON schema

I'll tell you about a cheap, simple and effective way to validate the payload structure of requests/responses/messages in JSON format.

We will learn how to identify payload structure problems such as:

• missing required properties in objects;
• typos in keys;
• extra (unexpected) properties in structures;
• unexpected duplicates in the arrays;
• values don't match expected data types;
• string values don't match expected patterns;
• values out of the acceptable limits, etc.