public void testContainsEntryNullYes() {
    initMultimapWithNullKeyAndValue();
    assertTrue(multimap().containsEntry(null, null));
  }

  @MapFeature.Require({ALLOWS_NULL_KEY_QUERIES, ALLOWS_NULL_VALUE_QUERIES})
  public void testContainsEntryNullNo() {
    assertFalse(multimap().containsEntry(null, null));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)

    assertNull("getOrDefault(absent, null) should return null", getMap().getOrDefault(k3(), null));
  }

  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
  public void testGetOrDefault_absentNull() {
    assertEquals(
        "getOrDefault(null, def) should return the default value",
        v3(),
        getMap().getOrDefault(null, v3()));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)

class PACDecodingExceptionTest {

    /**
     * Test the default constructor.
     */
    @Test
    void testDefaultConstructor() {
        PACDecodingException e = new PACDecodingException();
        // Expect null message and null cause
        assertNull(e.getMessage());
        assertNull(e.getCause());
    }

    /**
     * Test the constructor with a message.
     */
    @Test
    void testMessageConstructor() {

            ExtractData data = emlExtractor.getText(in, null);
            final String[] receivedDate = data.getValues("Received-Date");
            logger.info("Received-Date: {}", receivedDate[0]);
            assertEquals(receivedDate[0], "2012-11-11T02:39:59.000Z");
        }
    }

    public void test_getDecodeText() throws Exception {
        assertEquals("", emlExtractor.getDecodeText(null));

        if (boostExpr != null) {
            addFieldToSource(sourceMap, "boostExpr", boostExpr);
        }
        if (createdBy != null) {
            addFieldToSource(sourceMap, "createdBy", createdBy);
        }
        if (createdTime != null) {
            addFieldToSource(sourceMap, "createdTime", createdTime);
        }
        if (sortOrder != null) {

    }

    @Test
    void handlesAbsentTransferSource() throws InterruptedException, TransferCancelledException {
        TransferResource resource = new TransferResource(null, null, "http://maven.org/test/test-resource", null, null);

        RepositorySystemSession session = Mockito.mock(RepositorySystemSession.class);
        TransferListener delegate = Mockito.mock(TransferListener.class);

     * @return the normalized content, or empty string if content is null
     */
    public String getContent(final CrawlingConfig crawlingConfig, final ResponseData responseData, final String content,
            final Map<String, Object> dataMap) {
        if (content == null) {
            return StringUtil.EMPTY; // empty
        }

        if (crawlingConfig != null) {

    return (javaUtilOptional == null) ? null : fromNullable(javaUtilOptional.orElse(null));
  }

  /**
   * Returns the equivalent {@code java.util.Optional} value to the given {@code
   * com.google.common.base.Optional}, or {@code null} if the argument is null.
   *
   * <p>If {@code googleOptional} is known to be non-null, use {@code googleOptional.toJavaUtil()}
   * instead.
   *

        assertEquals("java", depArtifact.getProperty("language", null));
        assertEquals("jar", depArtifact.getProperty("type", null));
        assertEquals("true", depArtifact.getProperty("constitutesBuildPath", null));
        assertEquals("false", depArtifact.getProperty("includesDependencies", null));
        assertEquals(4, depArtifact.getProperties().size());

      cachingHashMap.remove(key);
      return null;
    }
  }

  @CanIgnoreReturnValue
  @Override
  public V put(K key, V value) {
    checkNotNull(key);
    checkNotNull(value);
    Timestamped<V> oldValue = cachingHashMap.put(key, new Timestamped<V>(value, ticker));
    if (oldValue == null) {
      return null;
    }