assertSize(3);
  }

  public void testPutNullReplace() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');

    if (supportsNullValues()) {
      assertEquals((Character) 'b', table.put("bar", 1, nullableCellValue(null)));
      assertNull(table.get("bar", 1));
    } else {
      try {
        table.put("bar", 1, nullableCellValue(null));
        fail();
      } catch (NullPointerException expected) {

    }
    assertSize(0);
  }

  @Override
  public void testPutAllTable() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    Table<String, Integer, Character> other = HashBasedTable.create();
    other.put("foo", 1, 'd');
    other.put("bar", 2, 'e');
    other.put("cat", 2, 'f');
    try {
      table.putAll(other);
      fail("Expected UnsupportedOperationException");

  }

  public void testToString() {
    Multimap<String, Integer> multimap = create();
    multimap.put("foo", 3);
    multimap.put("bar", 1);
    multimap.putAll("foo", Arrays.asList(-1, 2, 4));
    multimap.putAll("bar", Arrays.asList(2, 3));
    multimap.put("foo", 1);
    assertEquals("{bar=[3, 2, 1], foo=[4, 3, 2, 1, -1]}", multimap.toString());
  }

  public void testGetComparator() {

        create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    Table<String, Integer, Character> copy = HashBasedTable.create(original);
    assertEquals(original, copy);
    assertEquals((Character) 'a', copy.get("foo", 1));
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testSerialization() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');

    Table<String, Integer, C> reordered = create("foo", 3, 'c', "foo", 1, 'a', "bar", 1, 'b');
    Table<String, Integer, C> smaller = create("foo", 1, 'a', "bar", 1, 'b');
    Table<String, Integer, C> swapOuter = create("bar", 1, 'a', "foo", 1, 'b', "bar", 3, 'c');
    Table<String, Integer, C> swapValues = create("foo", 1, 'c', "bar", 1, 'b', "foo", 3, 'a');

    new EqualsTester()

    Table<String, Integer, C> reordered = create("foo", 3, 'c', "foo", 1, 'a', "bar", 1, 'b');
    Table<String, Integer, C> smaller = create("foo", 1, 'a', "bar", 1, 'b');
    Table<String, Integer, C> swapOuter = create("bar", 1, 'a', "foo", 1, 'b', "bar", 3, 'c');
    Table<String, Integer, C> swapValues = create("foo", 1, 'c', "bar", 1, 'b', "foo", 3, 'a');

    new EqualsTester()

    assertSize(3);
  }

  public void testPutNullReplace() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');

    if (supportsNullValues()) {
      assertEquals((Character) 'b', table.put("bar", 1, nullableCellValue(null)));
      assertNull(table.get("bar", 1));
    } else {
      try {
        table.put("bar", 1, nullableCellValue(null));
        fail();
      } catch (NullPointerException expected) {

    populate(table, data);
    return table;
  }

  public void testRowKeySetOrdering() {
    table = create("foo", 3, 'a', "bar", 1, 'b', "foo", 2, 'c');
    assertThat(table.rowKeySet()).containsExactly("foo", "bar").inOrder();
  }

  public void testRowOrdering() {
    table = create("foo", 3, 'a', "bar", 1, 'b', "foo", 2, 'c');
    assertThat(table.row("foo").keySet()).containsExactly(2, 3).inOrder();
  }

    String[] result = ObjectArrays.concat("foo", new String[] {"bar"});
    assertThat(result).asList().containsExactly("foo", "bar").inOrder();
  }

  public void testPrependTwoElements() {
    String[] result = ObjectArrays.concat("foo", new String[] {"bar", "baz"});
    assertThat(result).asList().containsExactly("foo", "bar", "baz").inOrder();
  }

  public void testAppendZeroElements() {

    String[] result = ObjectArrays.concat("foo", new String[] {"bar"});
    assertThat(result).asList().containsExactly("foo", "bar").inOrder();
  }

  public void testPrependTwoElements() {
    String[] result = ObjectArrays.concat("foo", new String[] {"bar", "baz"});
    assertThat(result).asList().containsExactly("foo", "bar", "baz").inOrder();
  }

  public void testAppendZeroElements() {