def void testExpressions() {
	var lnull = factory.createNullLiteralExp
	assertEquals("null", lnull.toString)
	
	var lbool = factory.createBooleanLiteralExp
	lbool.booleanSymbol = true
	assertEquals("true", lbool.toString)
	lbool.booleanSymbol = false
	assertEquals("false", lbool.toString)
	
	var lint = factory.createIntegerLiteralExp
	lint.integerSymbol = 1234
	assertEquals("1234", lint.toString)
		
	var lreal = factory.createRealLiteralExp
	lreal.realSymbol = 1.234
	assertEquals("1.234", lreal.toString)
		
	var lif = factory.createIfExp
	lif.condition = lbool
	lif.thenExpression = lint
	lif.elseExpression = lreal
	assertEquals("if false then 1234 else 1.234 endif", lif.toString)
}