Packages 
Package Description
org.junit.jupiter.api
JUnit Jupiter API for writing tests.
org.junit.jupiter.api.condition
Annotation-based conditions for enabling or disabling tests in JUnit Jupiter.
org.junit.jupiter.api.extension
JUnit Jupiter API for writing extensions.
org.junit.jupiter.api.function
Functional interfaces used within JUnit Jupiter.
org.junit.jupiter.api.parallel
JUnit Jupiter API for influencing parallel test execution.