Grails codec that allows to manipulate underscores inside strings

UnderscoreCodec.groovy

//codec must be created inside grails-app/utils named like *Codec.groovy

class UnderscoreCodec {
	static encode = {target->
		target.replaceAll(" ", "_")
	}
	
	static decode = {target->
		target.replaceAll("_", " ")
	}
}

//define a test in test/unit

class UnderscoreCodecTests extends GroovyTestCase {
	void testEncode() {
		String test = "this is a test"
		assertEquals "this_is_a_test", test.encodeAsUnderscore()
	}
	
	void testDecode() {
		String test = "this_is_a_test"
		assertEquals "this is a test", test.decodeUnderscore()
	}
}

//credits to https://www.ibm.com/developerworks/java/library/j-grails03109/