intersection(newHashSet(1, 2), newHashSet(1, 2, 3)),
            difference(newHashSet(1, 2, 3), newHashSet(3)),
            symmetricDifference(newHashSet(1, 3), newHashSet(2, 3)))
        .addEqualityGroup(
            newHashSet(3, 2),
            union(singleton(3), singleton(2)),
            intersection(newHashSet(3, 2), newHashSet(3, 2, 1)),
            difference(newHashSet(3, 2, 1), newHashSet(1)),

    Set<Feature<?>> features = newHashSet(FOO);
    assertThat(addImpliedFeatures(features)).isSameInstanceAs(features);
  }

  public void testAddImpliedFeatures_addsImpliedFeatures() {
    assertThat(addImpliedFeatures(newHashSet(FOO))).containsExactly(FOO);

    assertThat(addImpliedFeatures(newHashSet(IMPLIES_IMPLIES_FOO)))
        .containsExactly(IMPLIES_IMPLIES_FOO, IMPLIES_FOO, FOO);

 * limitations under the License.
 */

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

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Sets.newHashSet;
import static com.google.common.collect.Sets.newTreeSet;
import static com.google.common.collect.testing.SampleElements.Strings.AFTER_LAST;
import static com.google.common.collect.testing.SampleElements.Strings.AFTER_LAST_2;

    Set<String> set = of("a", "b");
    assertEquals(newHashSet("a", "b"), set);
  }

  public void testCreation_threeElements() {
    Set<String> set = of("a", "b", "c");
    assertEquals(newHashSet("a", "b", "c"), set);
  }

  public void testCreation_fourElements() {
    Set<String> set = of("a", "b", "c", "d");
    assertEquals(newHashSet("a", "b", "c", "d"), set);
  }

  }

  public void testNewHashSetEmpty() {
    @SuppressWarnings("UseCollectionConstructor") // test of factory method
    HashSet<Integer> set = newHashSet();
    verifySetContents(set, EMPTY_COLLECTION);
  }

  public void testNewHashSetVarArgs() {
    HashSet<Integer> set = newHashSet(0, 1, 1);
    verifySetContents(set, asList(0, 1));
  }

  public void testNewHashSetFromCollection() {

 * limitations under the License.
 */

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

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Sets.newHashSet;
import static com.google.common.collect.Sets.newTreeSet;
import static com.google.common.collect.testing.SampleElements.Strings.AFTER_LAST;
import static com.google.common.collect.testing.SampleElements.Strings.AFTER_LAST_2;

      }
    };
  }

  public void test_contains_null_set_yes() {
    Iterable<@Nullable String> set = newHashSet("a", null, "b");
    assertTrue(Iterables.contains(set, null));
  }

  public void test_contains_null_set_no() {
    Iterable<String> set = newHashSet("a", "b");
    assertFalse(Iterables.contains(set, null));
  }

  public void test_contains_null_iterable_yes() {

      }
    };
  }

  public void test_contains_null_set_yes() {
    Iterable<@Nullable String> set = newHashSet("a", null, "b");
    assertTrue(Iterables.contains(set, null));
  }

  public void test_contains_null_set_no() {
    Iterable<String> set = newHashSet("a", "b");
    assertFalse(Iterables.contains(set, null));
  }

  public void test_contains_null_iterable_yes() {

import static org.codelibs.core.collection.CollectionsUtil.newArrayList;
import static org.codelibs.core.collection.CollectionsUtil.newHashMap;
import static org.codelibs.core.collection.CollectionsUtil.newHashSet;
import static org.codelibs.core.lang.GenericsUtil.getActualClass;
import static org.codelibs.core.lang.GenericsUtil.getGenericParameters;
import static org.codelibs.core.lang.GenericsUtil.getTypeVariableMap;

package com.google.common.collect;

import static com.google.common.collect.Maps.immutableEntry;
import static com.google.common.collect.ReflectionFreeAssertThrows.assertThrows;
import static com.google.common.collect.Sets.newHashSet;
import static com.google.common.truth.Truth.assertThat;
import static java.util.Collections.singletonMap;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;