assertNotNull(result);
        assertEquals("", result.getContent());
    }

    /**
     * Test extraction with whitespace-only filename.
     */
    public void test_getText_withWhitespaceFilename() {
        final InputStream in = new ByteArrayInputStream(new byte[0]);
        final Map<String, String> params = new HashMap<>();
        params.put(ExtractData.RESOURCE_NAME_KEY, "   ");