// Storage may not be enabled, so accept various responses
        int statusCode = response.getStatusCode();
        assertTrue(statusCode == 200 || statusCode == 400 || statusCode == 500,
                "Status code should be 200, 400 or 500, but was " + statusCode);
    }

    @Test
    void testDownload_notFound() {
        // Try to download a non-existent file
        Response response =

        // Assert
        assertArrayEquals(expected, actual, "Base64.decode should return original bytes");
    }

    @Test
    @DisplayName("encode should throw NPE on null input")
    void testEncodeNull() {
        assertThrows(NullPointerException.class, () -> Base64.encode(null));
    }

    @Test
    @DisplayName("decode should throw NPE on null input")
    void testDecodeNull() {

   * implementations.
   */
  @SuppressWarnings({
    "GoodTime", // should accept a java.time.Duration
    "CatchingUnchecked", // sneaky checked exception
    "Interruption", // We copy AbstractExecutorService.invokeAny. Maybe we shouldn't: b/227335009.
  })
  @J2ktIncompatible
  @GwtIncompatible
  @ParametricNullness

        // Act + Assert
        assertTrue(it.hasNext());
        assertEquals("a", it.next().getName(), "First element should be initial from open()");
        assertTrue(it.hasNext());
        assertEquals("b", it.next().getName(), "Next element should skip '.' and '..'");
        assertFalse(it.hasNext(), "Iterator exhausted after valid entries");
        verify(tree, times(1)).release(); // closed after exhaustion
    }

public interface ArtifactMetadata {
    /**
     * Whether this metadata should be stored alongside the artifact.
     *
     * @return whether this metadata should be stored alongside the artifact
     */
    boolean storedInArtifactVersionDirectory();

    /**
     * Whether this metadata should be stored alongside the group.
     *
     * @return whether this metadata should be stored alongside the group
     */

                languageHelper.getReindexScriptSource());
    }

    @Test
    public void test_init() {
        try {
            languageHelper.init();
            // Should not throw exception
        } catch (Exception e) {
            fail("init() should not throw an exception: " + e.getMessage());
        }
    }

    @Test
    public void test_updateDocument_withExistingLang() {

        // Cache should be invalidated
        assertFalse(cacheEntry.isComplete());

        // Step 10: Test lease release
        directoryLeaseManager.releaseDirectoryLease(directoryPath);

        // Cache entry should be removed
        assertNull(directoryLeaseManager.getCacheEntry(directoryPath));

        urlQueueService.insert(urlQueue);

        // Poll should return the item
        final OpenSearchUrlQueue polled = urlQueueService.poll(sessionId);
        assertNotNull(polled);
        assertEquals("http://www.example.com/page1", polled.getUrl());
        assertEquals(sessionId, polled.getSessionId());

        // Second poll should return null (queue is empty)

        assertSame(ndrBuffer.deferred, derivedBuffer.deferred); // Deferred should be the same as original

        // Ensure changes to derived buffer don't affect original's index/start
        derivedBuffer.advance(5);
        assertEquals(15, derivedBuffer.index);
        assertEquals(50, ndrBuffer.index); // Original index should be unchanged
    }

    @Test
    void testReset() {
        ndrBuffer.advance(100);

 *
 * Implementations should check if the initial request already included an attempt to
 * authenticate. If so it is likely that further attempts will not be useful and the authenticator
 * should give up.
 *
 * When reactive authentication is requested by an origin web server, the response code is 401
 * and the implementation should respond with a new request that sets the "Authorization" header.
 *