}
			return errMalformedEncoding
		}
		key := strings.ToLower(line[:idx])
		value := line[idx+1:]
		if _, ok := wantTrailers[key]; !ok {
			if cr.debug {
				fmt.Printf("Unknown key %q - expected on of %v\n", key, cr.trailers)
			}
			return errMalformedEncoding
		}
		cr.trailers.Set(key, value)
		delete(wantTrailers, key)
	}

	// Check if we got all we want.
	if len(wantTrailers) > 0 {

    //                                                                        ============
    /**
     * Verifies that the CRUD mode matches the expected mode.
     *
     * @param crudMode the actual CRUD mode
     * @param expectedMode the expected CRUD mode
     */
    protected void verifyCrudMode(final int crudMode, final int expectedMode) {
        if (crudMode != expectedMode) {

                generator.saveImage(input, outputFile);
            }
            assertImageSize(outputFile, 100, 100);
        } catch (IllegalStateException e) {
            // Expected when container is not initialized
            if (e.getMessage().contains("Not initialized")) {
                // Skip test when container is not available
                return;
            }
            throw e;

        indexUpdater.finishCrawling = true;
        indexUpdater.destroy();
        // finishCrawling should be set when max empty list count is exceeded
        // In test environment this may not work as expected
        // assertTrue(indexUpdater.finishCrawling);
    }

    // Test addFinishedSessionId
    public void test_addFinishedSessionId() {
        final String sessionId = "session123";

        // Pending status is informational (not error)
        assertTrue((pendingStatus & (int) 0xC0000000L) != (int) 0xC0000000L);
    }

    @Test
    @DisplayName("Should define all expected constants")
    void testAllExpectedConstants() {
        // Verify important constants exist
        assertTrue(NtStatus.NT_STATUS_SUCCESS == 0x00000000);
        assertTrue(NtStatus.NT_STATUS_ACCESS_DENIED != 0);

        try {
            queryFieldConfig.isApiResponseField("field1");
            fail("Should throw NullPointerException");
        } catch (NullPointerException e) {
            // Expected
        }
    }

    public void test_getResponseFields() {
        String[] fields = { "field1", "field2", "field3" };
        queryFieldConfig.setResponseFields(fields);

    File file = createTempFile();
    Files.write(bytes, file);

    // Test
    MappedByteBuffer actual = Files.map(file);

    // Verify
    ByteBuffer expected = ByteBuffer.wrap(bytes);
    assertTrue("ByteBuffers should be equal.", expected.equals(actual));
  }

  public void testMap_noSuchFile() throws IOException {
    // Setup
    File file = createTempFile();
    boolean deleted = file.delete();

    try {
      collection.retainAll(target.toRetain);
      String message = Platform.format("retainAll(%s) should throw", target);
      fail(message);
    } catch (UnsupportedOperationException expected) {
    }
  }

  private void expectReturnsFalseOrThrows(Target target) {
    String message = Platform.format("retainAll(%s) should return false or throw", target);
    try {

        }

        @Test
        @DisplayName("Should handle null buffer")
        void testReadBytesWithNullBuffer() {
            // This is expected behavior for echo request - no reading needed
            assertDoesNotThrow(() -> {
                int result = echoRequest.readBytesWireFormat(null, 0);
                assertEquals(0, result);
            });

 * or method references instead of classes, leaving your code easier to migrate in the future.
 *
 * <p>To use an existing supplier instance (say, named {@code supplier}) in a context where the
 * <i>other type</i> of supplier is expected, use the method reference {@code supplier::get}. A
 * future version of {@code com.google.common.base.Supplier} will be made to <i>extend</i> {@code