Platform for Functional Reactive Programming with Java 8

Reactive Extensions for Java

A collection of JUnit rules for testing code which uses java.lang.System.

The Apache Commons IO library contains utility classes, stream implementations, file filters,

Non-Blocking Reactive Foundation for the JVM

JUnit Jupiter is the API for writing tests using JUnit 5.

Rich and fluent assertions for testing in Java

Core API and libraries of hamcrest matcher framework.

Mockito mock objects library core API and implementation

A Protocol for Asynchronous Non-Blocking Data Sequence