assertNull("put(null, null) should return null", put(nullKeyValueEntry));
    expectAdded(nullKeyValueEntry);
  }

  @CanIgnoreReturnValue
  private V put(Entry<K, V> entry) {
    return getMap().put(entry.getKey(), entry.getValue());
  }

  /**
   * Returns the {@link Method} instance for {@link #testPut_nullKeyUnsupported()} so that tests of
   * {@link java.util.TreeMap} can suppress it with {@code

  public void testPutAll_nullCollectionReference() {
    assertThrows(NullPointerException.class, () -> getMap().putAll(null));
  }

  private void putAll(Iterable<Entry<K, V>> entries) {
    Map<K, V> map = new LinkedHashMap<>();
    for (Entry<K, V> entry : entries) {
      map.put(entry.getKey(), entry.getValue());
    }
    getMap().putAll(map);
  }

  /**

    assertNull("put(null, null) should return null", put(nullKeyValueEntry));
    expectAdded(nullKeyValueEntry);
  }

  @CanIgnoreReturnValue
  private V put(Entry<K, V> entry) {
    return getMap().put(entry.getKey(), entry.getValue());
  }

  /**
   * Returns the {@link Method} instance for {@link #testPut_nullKeyUnsupported()} so that tests of
   * {@link java.util.TreeMap} can suppress it with {@code

  public void testPutAll_nullCollectionReference() {
    assertThrows(NullPointerException.class, () -> getMap().putAll(null));
  }

  private void putAll(Iterable<Entry<K, V>> entries) {
    Map<K, V> map = new LinkedHashMap<>();
    for (Entry<K, V> entry : entries) {
      map.put(entry.getKey(), entry.getValue());
    }
    getMap().putAll(map);
  }

  /**

            KerberosCredentials credentials = new KerberosCredentials(LOGIN_CONTEXT_NAME);
            KerberosKey foundKey = credentials.getKey(KEY_TYPE_1);
            assertNotNull(foundKey);
            assertEquals(key1, foundKey);
        }
    }

    /**
     * Test getKey method when the requested key type does not exist.
     *
     * @throws LoginException if login fails.
     */
    @Test

        decodedContext.decode(buffer, 0, buffer.length);

        // Verify decoded values
        assertArrayEquals(originalKey.getKey(), decodedContext.getLeaseKey().getKey());
        assertEquals(originalLeaseState, decodedContext.getLeaseState());
        assertEquals(originalScope, decodedContext.getCacheScope());
        assertEquals(60000L, decodedContext.getMaxCacheAge());

        assertTrue(result);
        assertEquals(1, chain.changePasswordCalls.size());
        assertEquals("testuser", chain.changePasswordCalls.get(0).getKey());
        assertEquals("newpassword123", chain.changePasswordCalls.get(0).getValue());
    }

    // Test changePassword with failure
    public void test_changePassword_failure() {

            when(mockReferralData.getKey()).thenReturn(key);
            doNothing().when(mockReferralData).setKey(key);

            mockReferralData.setKey(key);
            String retrievedKey = mockReferralData.getKey();

            assertEquals(key, retrievedKey);
            verify(mockReferralData, times(1)).setKey(key);
            verify(mockReferralData, times(1)).getKey();

  @MapFeature.Require(SUPPORTS_PUT)
  public void testAbsent() {
    assertEquals(
        "Map.merge(absent, value, function) should return value",
        v3(),
        getMap()
            .merge(
                k3(),
                v3(),
                (oldV, newV) -> {
                  throw new AssertionFailedError(

    if (object instanceof Entry) {
      Entry<?, ?> that = (Entry<?, ?>) object;
      return Objects.equals(this.getKey(), that.getKey())
          && Objects.equals(this.getValue(), that.getValue());
    }
    return false;
  }

  /**
   * A sensible definition of {@link #hashCode()} in terms of {@link #getKey()} and {@link
   * #getValue()}. If you override either of these methods, you may wish to override {@link