auth.handle(new Callback[] { nc, pc });

        // With empty strings for username and domain, results in "@"
        assertEquals("@", nc.getName());
        // Password is null, so callback is not set (remains null)
        assertNull(pc.getPassword());
    }

    @Test
    @DisplayName("handle: null password leaves PasswordCallback unset")
    void testHandleWithNullPasswordDoesNotSet() throws Exception {

        assertSame(responseData, testTransformer.getLastResponseData());
    }

    /**
     * Test transform with null name
     */
    public void test_transform_withNullName() {
        // Don't set name (remains null)
        ResponseData responseData = new ResponseData();

        ResultData resultData = testTransformer.transform(responseData);

        assertNotNull(resultData);

      if (containsNaN(dataset)) {
        return NaN;
      }

      // Calculate the quotient and remainder in the integer division x = k * (N-1) / q, i.e.
      // index * (dataset.length - 1) / scale. If there is no remainder, we can just find the value
      // whose index in the sorted dataset equals the quotient; if there is a remainder, we
      // interpolate between that and the next value.

        SmbComTransactionResponse r2 = (SmbComTransactionResponse) d.nextElement();
        assertSame(d, r2, "Subsequent calls still return same instance");
        assertFalse(d.getIsPrimary(), "isPrimary remains false after subsequent call");
    }

    @Test
    public void toString_doesNotThrow() {
        DummyResponse d = new DummyResponse();
        String s = d.toString();

        }
    }

    @Nested
    @DisplayName("Payload Handling Tests")
    class PayloadHandlingTests {

        @Test
        @DisplayName("Should handle response with retained payload")
        void testHaveResponseWithRetainedPayload() throws SMBProtocolDecodingException {
            byte[] buffer = { 1, 2, 3, 4, 5 };
            response.setRetainPayload(true);

        assertFalse(renewed, "renewCredentials should return false when renewable credentials are not renewed");
        assertEquals(mockRenewableCredentials, wrapper.getCredentials(), "Credentials should remain unchanged if renew() returns null");
        verify(mockRenewableCredentials).renew();
    }

    @Test

   * ReadWriteLock implementation whose read and write locks retain a reference back to this lock.
   * Otherwise, a reference to just the read lock or just the write lock would not suffice to ensure
   * the {@code ReadWriteLock} is retained.
   */
  private static final class WeakSafeReadWriteLock implements ReadWriteLock {
    private final ReadWriteLock delegate;

    WeakSafeReadWriteLock() {
      this.delegate = new ReentrantReadWriteLock();

   * key. When a key-value pair is added to a multimap that didn't previously
   * contain any values for that key, a new collection generated by
   * createCollection is added to the map. That same collection instance
   * remains in the map as long as the multimap has any values for the key. If
   * all values for the key are removed, the key and collection are removed
   * from the map.
   *

        }
      }
    }
  }

  public void testRemainder() {
    for (long a : UNSIGNED_INTS) {
      for (long b : UNSIGNED_INTS) {
        try {
          assertThat(UnsignedInts.remainder((int) a, (int) b)).isEqualTo((int) (a % b));
          assertThat(b).isNotEqualTo(0);
        } catch (ArithmeticException e) {
          assertThat(b).isEqualTo(0);
        }
      }
    }
  }

        if (result < 0) {
          result = UnsignedLongs.remainder(result, m);
        }
        // result < 2^63 again
        result += aLo * bHi; // aLo * bHi < 2^63, result < 2^64
        result = times2ToThe32Mod(result, m); // result < m < 2^63
        return plusMod(result, UnsignedLongs.remainder(aLo * bLo /* < 2^64 */, m), m);
      }

      @Override