assertThat(map.get("One"), is("1"));
        assertThat(map.get("hoge"), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPut() throws Exception {
        assertThat(map.put("One", "11"), is("1"));
        assertThat(map.get("one"), is("11"));
    }

    /**
     * @throws Exception
     */
    @Test

      assertEquals(0, table.size());
      assertFalse(table.containsRow("foo"));
    } else {
      assertThrows(UnsupportedOperationException.class, () -> table.clear());
    }
  }

  public void testPut() {
    assertThat(table.put("foo", 1, cellValue('a'))).isNull();
    assertThat(table.put("bar", 1, cellValue('b'))).isNull();
    assertThat(table.put("foo", 3, cellValue('c'))).isNull();

  }

  public void testContainsValue() {
    boolean unused = create().containsValue(null);
  }

  public void testGet() {
    Object unused = create().get(null);
  }

  public void testPut() {
    create().put(null, null);
  }

  public void testPutAll() {
    create().putAll(new HashMap<String, Integer>());
  }

  public void testKeySet() {
    Map<String, Integer> map = create();

        assertThat(map.get("test3"), is(nullValue()));
        assertThat(map.getAt(0), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPut() throws Exception {
        assertThat(map.put("1", "test3"), is("test"));
        assertThat(map.get("1"), is("test3"));
        assertThat(map.getAt(1), is("test3"));
        map.put(null, "test4");