private Query newQuery(String queryString, IndexFacts indexFacts) {
        Query query = new Query(queryString);
        query.getModel().setExecution(new Execution(Execution.Context.createContextStub(indexFacts)));
        return query;
    }
Tests using synthetic index names for IndexFacts class.

@author Steinar Knutsen
container-search/src/test/java/com/yahoo/prelude/test/IndexFactsTestCase.java