Specsy is a BDD-style unit-level testing framework for Java/Scala/Groovy.
It safely isolates mutable state and supports writing self-documenting tests/specifications.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window parent-2.3.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
