The main framework for testing Java code is JUnit.

Junit has gone through several versions.

• As of W21, programming assignments for MenuItem and Menu were based on JUnit 4.
• However, Spring Boot legacy code projects are using JUnit 5.

Eventually, the programming assignments for MenuItem and Menu will be updated to use JUnit 5 syntax, but for now, it’s helpful to be aware of the differences.

import statements for JUnit in JUnit4 vs. JUnit 5

The import statements for JUnit 4 look like these (taken from the MenuItem and Menu assignments):

import org.junit.Test;
import org.junit.Before;
import static org.junit.Assert.assertEquals;

The import statements for JUnit 5 in a Spring Boot projects look like these:

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import org.junit.jupiter.api.Test;

Testing for Exceptions

This article explains the difference: https://www.baeldung.com/junit-assert-exception