@Test
    void testBothBackendsImplicitly() {
        BlendingSearcherWrapper searcher = setupFirstAndSecond();
        Query query = new Query("/search?query=banana");

        Result result = new Execution(searcher, Execution.Context.createContextStub()).search(query);
        assertEquals(3, result.getHitCount());
        assertEquals(300.0, result.hits().get(0).getRelevance().getScore(), delta);
        assertEquals(200.0, result.hits().get(1).getRelevance().getScore(), delta);
        assertEquals(100.0, result.hits().get(2).getRelevance().getScore(), delta);
    }
Disabled because the document source searcher does not handle being asked for
document sumaries for hits it did not create (it will insert the wrong values).
But are we sure fsearch handles this case correctly?
container-search/src/test/java/com/yahoo/prelude/searcher/test/BlendingSearcherTestCase.java