assertEquals(0, CharStreams.exhaust(empty));
    assertEquals(-1, empty.read());
  }

  public void testExhaust_readable() throws IOException {
    CharBuffer buf = CharBuffer.wrap(ASCII);
    assertEquals(ASCII.length(), CharStreams.exhaust(buf));
    assertEquals(0, buf.remaining());
    assertEquals(0, CharStreams.exhaust(buf));

    CharBuffer empty = CharBuffer.wrap("");
    assertEquals(0, CharStreams.exhaust(empty));

        // Verify
        assertEquals(100, decodedSize);
        assertEquals(3, referral.getVersion());
        assertEquals(100, referral.getSize());
        assertEquals(1, referral.getServerType());
        assertEquals(0, referral.getRFlags());
        assertEquals(5, referral.getProximity());
        assertEquals(300, referral.getTtl());
        assertEquals(path, referral.getRpath());

        byte[] encoded = original.encode();
        assertEquals(Smb2ChannelCapabilities.NETWORK_INTERFACE_INFO_SIZE, encoded.length);

        NetworkInterfaceInfo decoded = NetworkInterfaceInfo.decode(encoded, 0);
        assertNotNull(decoded);
        assertEquals(original.getAddress(), decoded.getAddress());
        assertEquals(original.getLinkSpeed(), decoded.getLinkSpeed());

        // Read some data
        assertEquals('T', stream.read());

        // Close should be ignored
        stream.close();

        // Should still be able to read
        assertEquals('e', stream.read());
        assertEquals('s', stream.read());
        assertEquals('t', stream.read());
    }

    public void test_read_delegatesToUnderlying() throws IOException {

            }
            return "Success";
        });

        final String result = fesenClient.get(c -> mockFuture);

        assertEquals("Success", result);
        assertEquals(6, attemptCount.get()); // Initial attempt + 5 retries
    }

    /**
     * Test: Retry logic fails after exceeding maxRetryCount

    // Simple examples (smoke tests)
    assertEquals("xxx", xmlEscaper.escape("xxx"));
    assertEquals("test & test & test", xmlEscaper.escape("test & test & test"));
    assertEquals("test &lt;&lt; 1", xmlEscaper.escape("test << 1"));
    assertEquals("test &gt;&gt; 1", xmlEscaper.escape("test >> 1"));
    assertEquals("&lt;tab&gt;", xmlEscaper.escape("<tab>"));

            // Then
            assertEquals(1, existsExceptions.length, "exists() should declare CIFSException");
            assertEquals(CIFSException.class, existsExceptions[0], "Should declare CIFSException");
            assertEquals(1, getTypeExceptions.length, "getType() should declare CIFSException");
            assertEquals(CIFSException.class, getTypeExceptions[0], "Should declare CIFSException");

            assertEquals(3, keys.size());
            assertEquals("first", keys.get(0));
            assertEquals("second", keys.get(1));
            assertEquals("third", keys.get(2));

            // Verify value was updated
            assertEquals("modified", modelProps.getProperty("first"));
        }
    }

    @Nested

            // Verify all ACB constants
            assertEquals(1, samr.ACB_DISABLED);
            assertEquals(2, samr.ACB_HOMDIRREQ);
            assertEquals(4, samr.ACB_PWNOTREQ);
            assertEquals(8, samr.ACB_TEMPDUP);
            assertEquals(16, samr.ACB_NORMAL);
            assertEquals(32, samr.ACB_MNS);
            assertEquals(64, samr.ACB_DOMTRUST);
            assertEquals(128, samr.ACB_WSTRUST);

        assertEquals(1, stringValues.length);
        assertEquals("value1", stringValues[0]);

        String[] arrayValues = defaultContentsParser.getFieldValues(document, "string_array_field");
        assertEquals(2, arrayValues.length);
        assertEquals("value2", arrayValues[0]);
        assertEquals("value3", arrayValues[1]);