Guava is a suite of core and expanded libraries that include

JavaMail API for sending and receiving emails using standard protocols like SMTP, POP3, and IMAP, supporting both text ...

The Apache Mailet API is a flexible specification for mail processing agents.

Additional functionality that enhances JSR-310 dates and times in Java SE 8 and later

Apache James Basic Mailet Toolkit is a collection of utilities and lightweight framework

Rich and fluent assertions for testing in Java

Core package for the JUnit Jupiter test engine.

Public API for configuring and launching test plans.

A thin layer on top of JUnit 4 to allow running vintage tests (based on JUnit 3.8 and JUnit 4) with the JUnit Platform ...

Mockito mock objects library core API and implementation