- Exception types and messages
- Stream consumption (should not consume)
- Consistency across multiple calls

**Test Count**: 11 tests

**Key Scenarios**:
- ✅ Validates non-null streams
- ✅ Throws CrawlerSystemException for null
- ✅ Called during getText execution
- ✅ Does not consume or modify stream
- ✅ Consistent behavior across multiple calls
- ✅ Works with various InputStream types

---

 *
 * This exception is used to indicate errors that occur during the execution
 * of SSO authentication and authorization processes. It extends FessSystemException
 * to provide consistent error handling within the Fess system for SSO-related
 * processing failures such as token validation errors, communication failures
 * with SSO providers, or configuration issues.
 */

     */
    public FilenameExtractor() {
        // Default constructor
    }

    /**
     * Extracts the filename from the parameters.
     *
     * <p>Note: The input stream is validated for consistency with the Extractor interface,
     * but is not actually read. Only the resource name from the parameters is used.</p>
     *
     * @param in The input stream (validated but not read)

            assertFalse("validateCalled should be false as exception thrown before flag set", extractor.isValidateCalled());
        }
    }

    /**
     * Test that validateInputStream is consistent across multiple calls.
     */
    public void test_validateInputStream_consistentAcrossMultipleCalls() {
        final InputStream in1 = new ByteArrayInputStream("data1".getBytes());

        assertNotNull(result.getContent());
        assertTrue("Should contain test content", result.getContent().contains("テスト"));
    }

    /**
     * Test that error message format is consistent and descriptive.
     */
    public void test_errorMessage_formatIsDescriptive() {
        final InputStream errorStream = new InputStream() {
            @Override
            public int read() throws IOException {

     */
    public boolean isDeleted() {
        return isUpdated() && newInputs.length == 0;
    }

    /**
     * Sorts both the current inputs and new inputs arrays in place.
     * This ensures consistent ordering for comparison and equality operations.
     */
    public void sort() {
        if (inputs != null) {
            Arrays.sort(inputs);
        }
        if (newInputs != null) {

    }

    /**
     * Inner class for handling updates to the character mapping file.
     * This class manages the temporary file creation, writing operations,
     * and atomic updates to ensure data consistency during modifications.
     */
    protected class MappingUpdater implements Closeable {

        /** Flag indicating whether changes should be committed to the file. */
        protected boolean isCommit = false;

            assertNotNull(request);
            assertEquals(method, request.method());
        }
    }

    @Test
    public void test_FactoryMethodsConsistency() {
        // ## Test that factory methods are consistent with constructor ##

        // ## Act ##
        final String url = "http://example.com";
        final CurlRequest getViaFactory = Curl.get(url);

 * possible readings.
 * </p>
 *
 * <p>
 * The class also utilizes ICU4J's {@link com.ibm.icu.text.Transliterator} to convert full-width characters
 * to half-width and to convert any characters to lowercase, ensuring consistency in the output.
 * </p>
 *
 * <p>
 * Example:
 * For the input "キャ", the converter might return a list containing "kya".
 * For the input "ジュ", the converter might return a list containing "zyu", "ju", and "jyu".

        assertTrue(id.length() <= 445);
    }

    @Test
    public void testCreateSuggestTextIdConsistency() {
        // Test that same input always produces same output
        String text = "consistency test";
        String id1 = SuggestUtil.createSuggestTextId(text);
        String id2 = SuggestUtil.createSuggestTextId(text);
        assertEquals(id1, id2);
    }