@Test
    public void testEntrySet() throws Exception {
        Iterator<Map.Entry<String, String>> i = map.entrySet().iterator();
        assertThat(i.next().getKey(), is(nullValue()));
        assertThat(i.next().getKey(), is("1"));
        assertThat(i.next().getKey(), is("2"));
    }

    /**
     * Test method for {@link org.seasar.util.collection.ArrayIterator#remove()}
     * .
     */
    @Test

      if (testAsByteSource) {
        suite.addTest(
            suiteForBytes(factory, entry.getValue().getBytes(UTF_8), name, entry.getKey(), true));
      } else {
        suite.addTest(suiteForString(factory, entry.getValue(), name, entry.getKey()));
      }
    }
    return suite;
  }

  static TestSuite suiteForBytes(

      if (delegate != null) {
        return delegate.entrySet().contains(o);
      } else if (o instanceof Entry) {
        Entry<?, ?> entry = (Entry<?, ?>) o;
        int index = indexOf(entry.getKey());
        return index != -1 && Objects.equals(value(index), entry.getValue());
      }
      return false;
    }

    @Override
    public boolean remove(@Nullable Object o) {

                (et, vl) -> ((CrawlingInfoParam) et).setCreatedTime(DfTypeUtil.toLong(vl)), "createdTime");
        setupEpg(_epgMap, et -> ((CrawlingInfoParam) et).getKey(), (et, vl) -> ((CrawlingInfoParam) et).setKey(DfTypeUtil.toString(vl)),
                "key");
        setupEpg(_epgMap, et -> ((CrawlingInfoParam) et).getValue(), (et, vl) -> ((CrawlingInfoParam) et).setValue(DfTypeUtil.toString(vl)),

        "Should not contain null after unsupported putIfAbsent(present, null)");
  }

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

  /** Returns the next entry in the chain. */
  @Nullable ReferenceEntry<K, V> getNext();

  /** Returns the entry's hash. */
  int getHash();

  /** Returns the key for this entry. */
  @Nullable K getKey();

  /*
   * Used by entries that use access order. Access entries are maintained in a doubly-linked list.
   * New entries are added at the tail of the list at write time; stale entries are expired from

            Collections.sort(list, (o1, o2) -> {
                final String k1 = o1.getKey();
                if (LANG_KEY.equals(k1)) {
                    return -1;
                }
                final String k2 = o2.getKey();
                if (LANG_KEY.equals(k2)) {
                    return -1;
                }
                return k1.compareTo(k2);

        final PrimaryCipher cipher = ComponentUtil.getPrimaryCipher();
        ParameterUtil.parse(value).entrySet().stream().map(e -> {
            final String k = e.getKey();
            final String v = e.getValue();
            if (properyPattern.matcher(k).matches() && !v.startsWith(CIPHER_PREFIX)) {
                return new Pair<>(k, CIPHER_PREFIX + cipher.encrypt(v));
            }

      assertSame(keyOne, entryOne.getKey());
      assertEquals(hashOne, entryOne.getHash());
      assertNull(entryOne.getNext());
      assertSame(valueOne, copyOne.getValue());

      InternalEntry<Object, Object, ?> copyTwo = segment.copyForTesting(entryTwo, copyOne);
      assertSame(keyTwo, copyTwo.getKey());
      assertEquals(hashTwo, copyTwo.getHash());

      assertSame(keyOne, entryOne.getKey());
      assertEquals(hashOne, entryOne.getHash());
      assertNull(entryOne.getNext());
      assertSame(valueOne, copyOne.getValue());

      InternalEntry<Object, Object, ?> copyTwo = segment.copyForTesting(entryTwo, copyOne);
      assertSame(keyTwo, copyTwo.getKey());
      assertEquals(hashTwo, copyTwo.getHash());