final String result = indexExportJob.execute();

        assertTrue(result.contains("Search engine error"));
        assertTrue(result.endsWith("\n"));
    }

    @Test
    public void test_execute_skipsDocumentsWithoutUrl() {
        final Map<String, Object> doc = new LinkedHashMap<>();
        doc.put("title", "No URL Doc");
        doc.put("content", "Content without URL");