J2V8 is a set of Java bindings for V8

Stetho Debugging Platform for Android

Provides source annotations for tooling and readability.

Kotlin Standard Library JDK 7 extension

Guava is a suite of core and expanded libraries that include

Using Mockito with Kotlin.

Mocking library for Kotlin

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

Mockito mock objects library core API and implementation

An alternative Android testing framework.