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JUnit is a unit testing framework to write and run repeatable automated tests on Java.

API for SLF4J (The Simple Logging Facade for Java) which serves as a simple facade or abstraction for various logging frameworks, allowing the end user to plug in the desired logging framework at deployment time.

Guava is a suite of core and expanded libraries that include utility classes, Google's collections, I/O classes, and much more.

Standard library for the Scala Programming Language

Mockito mock objects library core API and implementation

Kotlin Common Standard Library

Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.

General data-binding functionality for Jackson: works on core streaming API

Implementation of the SLF4J API for Logback, a reliable, generic, fast and flexible logging framework.

The Apache Commons IO library contains utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more.