assertEquals("Exported 1 documents.", result);
        // No file should be created
        assertFalse(Files.exists(tempDir.resolve("_invalid")));
    }

    @Test
    public void test_execute_excludeFieldsFromConfig() {
        final Map<String, Object> doc = new LinkedHashMap<>();
        doc.put("url", "https://example.com/page.html");
        doc.put("title", "Test");
        doc.put("content", "Body");