@Test
public void testValue_1() throws RecognitionException {
assertEquals(NullEvaluator.get(), parser("Null").value().r);
assertEquals(new StringEvaluator("'abc'"), parser("'abc'").value().r);
assertEquals(new BooleanEvaluator("true"), parser("true").value().r);
assertEquals(new ParamEvaluator("abc"), parser(":abc").value().r);
assertEquals(
new FunctionEvaluator("key",
ImmutableList.<Evaluator>of(new StringEvaluator("'abc'"))),
parser("key('abc')").value().r);