@Test
public void testGetFieldValue() {

	Cat cat = new Cat();
	assertEquals(rEngine.getFieldValue(cat, rEngine.getField(cat, "age2")), 2);
	assertEquals(rEngine.getFieldValue(cat, rEngine.getField(cat, "CONSTANT")), "Salut!");
	assertEquals(rEngine.getFieldValue(null, rEngine.getField(cat, "CONSTANT")), "Salut!");
}