AssertJ Courses

Learn integration testing with Spring Boot
Udemy

AssertJ: Fluent Assertion In Test Automation
Udemy

Major Migrations Made Easy
Devoxx via YouTube

Write Awesome Tests
Devoxx via YouTube

Major Migrations Made Easy
Spring I/O via YouTube

Mastering Java Testing With JUnit, Mockito, and AssertJ in IntelliJ IDEA
JetBrains via YouTube

Advanced Spring: Effective Integration Testing with Spring Boot
LinkedIn Learning

Spring Boot Testing - Batteries Included
Dan Vega via YouTube