Mock JWT Decoding with JwtDecoder in JUnit Tests

JSON web tokens (JWTs) are widely used for microservices and Spring security authentication. When testing Spring applications, mocking JWT decoding is often necessary. Let us delve into understanding how to test using Junit and mock JWT decoding with JwtDecoder. 1. Introduction to JWT and JwtDecoder 1.1 What is JWT? JWT (JSON Web Token) is a …