Binary package “junit4-doc” in ubuntu focal

JUnit regression test framework for Java - documentation

 JUnit is a simple framework to write repeatable tests. It is an
 instance of the xUnit architecture for unit testing frameworks.
 JUnit 4 uses Java 5 features such as generics and annotations. If
 you need compatibility with previous Java versions, you should use
 the junit package (version 3) instead.
 This package contains Javadoc API documentation of JUnit 4.