Adding another JVM language

The Java Koans can work with Koans written in other JVM languages as well. For example, to use the engine w/ koans written in Groovy:

1. Add compilation command to koans\lib\file-compiler\src\com\sandwich\util\io\filecompiler\compilationcommands.properties. For example, to add groovy support I added this line:

.groovy=groovyc -d ${bindir} -classpath ${classpath} ${filename}  

2. Update the compilationcommands.properties file in the koans\koans\app\lib\file-compiler.jar either by rebuilding the file-compiler project, or opening the jar in an archive utility. The file in the jar should match what you updated in step 1.
3. Create your koan. An example of a Groovy Koan might look like this:

package groovy.beginner;

import com.sandwich.koan.Koan;
import static com.sandwich.util.Assert.*;
import static com.sandwich.koan.constant.KoanConstants.__; 

class AboutGroovy {
	@Koan groovyListLiteral(){
		def list = __
		assertEquals([1, 2, 3], list)
	}
}

Make sure the test methods use the @Koan annotation and that it's located in a directory that is consistent with the package in the class. For example, I put the AboutGroovy file in the koans\koans\src\ groovy\beginner directory because its package is groovy.beginner.
4. Add the reference to your suite in the koans\koans\app\config\PathToEnlightment.xml
5. Add any jars the language's classes will need to koans\koans\app\lib. For Groovy I added groovy-2.2.1.jar and asm-4.1.jar files.
6. Test your koan running either run.sh or run.bat with the argument for your new lesson to test everything out:

run.sh groovy.beginner.AboutGroovy