* In drill down test we are drilling down to a facet that appears in a single document.
* As result, facets that without drill down got count of 2 will now get a count of 1.
*/
@Test
public void testDrillDown () throws Exception {
ExampleResult res = new SimpleMain().runDrillDown();
assertNotNull("Null result!", res);
assertNotNull("Null facet result!", res.getFacetResults());
assertEquals("Wrong number of results!",1, res.getFacetResults().size());
// drill down facet appears in only 1 doc, and that doc has only 2 facets