@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MapClearTester<K, V> extends AbstractMapTester<K, V> {
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClear() {
    getMap().clear();
    assertTrue("After clear(), a map should be empty.", getMap().isEmpty());
    assertEquals(0, getMap().size());
    assertFalse(getMap().entrySet().iterator().hasNext());
  }

    }
  }

  protected boolean supportsRemove() {
    return true;
  }

  protected boolean supportsNullValues() {
    return false;
  }

  public void testClear() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    if (supportsRemove()) {
      table.clear();
      assertEquals(0, table.size());
      assertFalse(table.containsRow("foo"));
    } else {

      assertSame(value, cache.getUnchecked(key));
      assertTrue(cache.asMap().containsKey(key));
      assertTrue(cache.asMap().containsValue(value));
      assertEquals(1, cache.size());
    }
  }

  public void testClear() {
    for (LoadingCache<Key, String> cache : caches()) {
      Key key = new Key(1);
      String value = key.toString();
      assertSame(value, cache.getUnchecked(key));
      assertFalse(cache.asMap().isEmpty());

    int unused = create().size();
  }

  public void testIsEmpty() {
    boolean unused = create().isEmpty();
  }

  public void testRemove() {
    create().remove(null);
  }

  public void testClear() {
    create().clear();
  }

  public void testContainsKey() {
    boolean unused = create().containsKey(null);
  }

  public void testContainsValue() {

    }
  }

  protected boolean supportsRemove() {
    return true;
  }

  protected boolean supportsNullValues() {
    return false;
  }

  public void testClear() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    if (supportsRemove()) {
      table.clear();
      assertEquals(0, table.size());
      assertFalse(table.containsRow("foo"));
    } else {

        e.remove();
        assertThat(e.getNext().getElement(), is("3"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testClear() throws Exception {
        list.addLast(null);
        list.addLast("1");
        list.addLast("2");
        list.clear();
        assertThat(list.size(), is(0));

    @Test
    public void testToString() throws Exception {
        assertThat(map.toString(), is(notNullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testClear() throws Exception {
        map.clear();
        assertThat(map.size(), is(0));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testEntrySet() throws Exception {

    map.removeAllZeros();
    assertFalse(map.asMap().containsValue(0L));
    assertEquals(ITERATIONS / 2, map.size());
    assertEquals(nonZeroKeys, map.asMap().keySet());
  }

  public void testClear() {
    AtomicLongMap<Object> map = AtomicLongMap.create();
    for (int i = 0; i < ITERATIONS; i++) {
      map.put(new Object(), i);
    }
    assertEquals(ITERATIONS, map.size());

    map.clear();

    assertThat(LONG_MANY_VALUES_STATS_ITERATOR.count()).isEqualTo(LONG_MANY_VALUES_COUNT);
    assertThat(LONG_MANY_VALUES_STATS_SNAPSHOT.count()).isEqualTo(LONG_MANY_VALUES_COUNT);
  }

  public void testMean() {
    assertThrows(IllegalStateException.class, () -> EMPTY_STATS_VARARGS.mean());
    assertThrows(IllegalStateException.class, () -> EMPTY_STATS_ITERABLE.mean());

      assertThrows(IllegalArgumentException.class, () -> IntMath.binomial(n, 0));
    }
  }

  @AndroidIncompatible // slow
  @GwtIncompatible // java.math.BigInteger
  public void testMean() {
    // Odd-sized ranges have an obvious mean
    assertMean(2, 1, 3);

    assertMean(-2, -3, -1);
    assertMean(0, -1, 1);
    assertMean(1, -1, 3);
    assertMean((1 << 30) - 1, -1, Integer.MAX_VALUE);