@Test
    public final void predicateTest() throws IOException {
        roundTripEquality("id:unittest:testpredicate::whee", "{ "
                + "\"actualpredicate\": \"foo in [bar]\" }");
    }
Functional tests for com.yahoo.document.json.JsonWriter.

@author Steinar Knutsen
document/src/test/java/com/yahoo/document/json/JsonWriterTestCase.java