Gradle - Different JDK Version for Source and Test

Issue

How can I configure Gradle to compile test classes for a different Java version than source classes?

I'm writing a project for Java 1.7, and I want to use Java 1.8 in my tests so I can use Lambda Behave. In Maven this is pretty straightforward, but I can't see how to achieve the same result in Gradle.

Solution

Of course, immediately after posting the question I stumble across the answer!

apply plugin: "java"

compileJava {
    sourceCompatibility = 1.7
}

compileTestJava {
    sourceCompatibility = 1.8
}

Answered By - EngineerBetter_DJ