@Test public void testSortField() { Mapper mapper = new StringMapper("field", null, null, null); Schema schema = mock(Schema.class); when(schema.getAnalyzer()).thenReturn(PreBuiltAnalyzers.DEFAULT.get()); when(schema.getMapper("field")).thenReturn(mapper); SortField sortField = new SortField("field", true); org.apache.lucene.search.SortField luceneSortField = sortField.sortField(schema); assertNotNull(luceneSortField); assertEquals(org.apache.lucene.search.SortField.class, luceneSortField.getClass()); }