.isWithin(ALLOWED_ERROR)
        .of(MANY_VALUES_MEAN * MANY_VALUES_COUNT);
    assertThat(MANY_VALUES_STATS_SNAPSHOT.sum())
        .isWithin(ALLOWED_ERROR)
        .of(MANY_VALUES_MEAN * MANY_VALUES_COUNT);
    assertThat(INTEGER_MANY_VALUES_STATS_VARARGS.sum())
        .isWithin(ALLOWED_ERROR * INTEGER_MANY_VALUES_MEAN)
        .of(INTEGER_MANY_VALUES_MEAN * INTEGER_MANY_VALUES_COUNT);

    assertThat(integerManyValuesAccumulatorByAddAllIterable.sum())
        .isWithin(ALLOWED_ERROR * INTEGER_MANY_VALUES_MEAN)
        .of(INTEGER_MANY_VALUES_MEAN * INTEGER_MANY_VALUES_COUNT);
    assertThat(longManyValuesAccumulatorByAddAllIterator.sum())
        .isWithin(ALLOWED_ERROR * LONG_MANY_VALUES_MEAN)
        .of(LONG_MANY_VALUES_MEAN * LONG_MANY_VALUES_COUNT);

 * limitations under the License.
 */

package com.google.common.collect.testing.testers;

import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.collect.testing.Helpers;

  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPutAll_nullValueSupported() {
    putAll(containsNullValue);
    expectAdded(containsNullValue.get(0));
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  public void testPutAll_nullValueUnsupported() {
    try {
      putAll(containsNullValue);

import static com.google.common.collect.testing.features.CollectionSize.ZERO;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.Multimap;
import com.google.common.collect.testing.Helpers;
import com.google.common.collect.testing.features.CollectionSize;

      (11.0 - INTEGER_MANY_VALUES_MEAN) * (11.0 - INTEGER_MANY_VALUES_MEAN)
          + (-22.0 - INTEGER_MANY_VALUES_MEAN) * (-22.0 - INTEGER_MANY_VALUES_MEAN)
          + (3333.0 - INTEGER_MANY_VALUES_MEAN) * (3333.0 - INTEGER_MANY_VALUES_MEAN)
          + (-4444.0 - INTEGER_MANY_VALUES_MEAN) * (-4444.0 - INTEGER_MANY_VALUES_MEAN)

  }

  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testContainsAll_nullPresent() {
    initCollectionWithNullElement();
    assertTrue(collection.containsAll(MinimalCollection.of((E) null)));
  }

  public void testContainsAll_wrongType() {
    Collection<WrongType> wrong = MinimalCollection.of(WrongType.VALUE);
    try {
      assertFalse(

          collection.addAll(MinimalCollection.of(e0())));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(
      value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES},
      absent = RESTRICTS_ELEMENTS)
  public void testAddAll_nullSupported() {
    List<E> containsNull = singletonList(null);

              }

              @Override
              public @Nullable String put(String key, String value) {
                checkNotNull(key);
                return map.put(key, value);
              }
            };
          }
        },
        "HashMap w/out null keys",
        ALLOWS_NULL_VALUES);
  }

  private static Test testsForHashMapNullValuesForbidden() {
    return wrappedHashMapTests(

              }

              @Override
              public @Nullable String put(String key, String value) {
                checkNotNull(key);
                return map.put(key, value);
              }
            };
          }
        },
        "HashMap w/out null keys",
        ALLOWS_NULL_VALUES);
  }

  private static Test testsForHashMapNullValuesForbidden() {
    return wrappedHashMapTests(