@Test
public void testShowSetProperty() throws IOException {

	// use a LinkedHashSet to be sure of the output order...
	final Set<Rational> testSet = new LinkedHashSet<>(
			Arrays.asList(new Rational[]{new Rational(300, 1), new Rational(4, 2)}));
	Property prop = new Property("test", PropertyType.RATIONAL, PropertyArity.SET, testSet);
	JsonObjectBuilder b = this.handler.showSetProperty(prop);
	buildJson(b);
       handler.close();
       
	String result = outString.toString();
	LOGGER.info(FIND + result);
	final String expected = "{\"test\":[[300,1],[4,2]]}";
	
    assertEquals(expected, result);
}