assertThat(ImmutableDoubleArray.of().lastIndexOf(21)).isEqualTo(-1);
    assertThat(iia.subArray(1, 5).lastIndexOf(1)).isEqualTo(0);
  }

  public void testContains() {
    ImmutableDoubleArray iia = ImmutableDoubleArray.of(1, 1, 2, 3, 5, 8);
    assertThat(iia.contains(1)).isTrue();
    assertThat(iia.contains(8)).isTrue();
    assertThat(iia.contains(4)).isFalse();

    mmHeap.removeAll(Lists.newArrayList(2, 3));
    assertEquals(3, mmHeap.size());
    assertTrue("Heap is not intact after removeAll()", mmHeap.isIntact());
  }

  public void testContains() {
    MinMaxPriorityQueue<Integer> mmHeap = MinMaxPriorityQueue.create();
    mmHeap.addAll(Lists.newArrayList(1, 1, 2));
    assertEquals(3, mmHeap.size());

        assertWithMessage(x + ", " + y)
            .that(Booleans.compare(x, y))
            .isEqualTo(Boolean.valueOf(x).compareTo(y));
      }
    }
  }

  public void testContains() {
    assertThat(Booleans.contains(EMPTY, false)).isFalse();
    assertThat(Booleans.contains(ARRAY_FALSE, true)).isFalse();
    assertThat(Booleans.contains(ARRAY_FALSE, false)).isTrue();

        assertWithMessage(x + ", " + y)
            .that(Floats.compare(x, y))
            .isEqualTo(Float.valueOf(x).compareTo(y));
      }
    }
  }

  public void testContains() {
    assertThat(Floats.contains(EMPTY, (float) 1)).isFalse();
    assertThat(Floats.contains(ARRAY1, (float) 2)).isFalse();
    assertThat(Floats.contains(ARRAY234, (float) 1)).isFalse();

        assertWithMessage(x + ", " + y)
            .that(Ints.compare(x, y))
            .isEqualTo(Integer.valueOf(x).compareTo(y));
      }
    }
  }

  public void testContains() {
    assertThat(Ints.contains(EMPTY, (int) 1)).isFalse();
    assertThat(Ints.contains(ARRAY1, (int) 2)).isFalse();
    assertThat(Ints.contains(ARRAY234, (int) 1)).isFalse();

        assertWithMessage(x + ", " + y)
            .that(Doubles.compare(x, y))
            .isEqualTo(Double.valueOf(x).compareTo(y));
      }
    }
  }

  public void testContains() {
    assertThat(Doubles.contains(EMPTY, (double) 1)).isFalse();
    assertThat(Doubles.contains(ARRAY1, (double) 2)).isFalse();
    assertThat(Doubles.contains(ARRAY234, (double) 1)).isFalse();

        assertWithMessage(x + ", " + y)
            .that(Floats.compare(x, y))
            .isEqualTo(Float.valueOf(x).compareTo(y));
      }
    }
  }

  public void testContains() {
    assertThat(Floats.contains(EMPTY, (float) 1)).isFalse();
    assertThat(Floats.contains(ARRAY1, (float) 2)).isFalse();
    assertThat(Floats.contains(ARRAY234, (float) 1)).isFalse();

        assertWithMessage(x + ", " + y)
            .that(Longs.compare(x, y))
            .isEqualTo(Long.valueOf(x).compareTo(y));
      }
    }
  }

  public void testContains() {
    assertThat(Longs.contains(EMPTY, (long) 1)).isFalse();
    assertThat(Longs.contains(ARRAY1, (long) 2)).isFalse();
    assertThat(Longs.contains(ARRAY234, (long) 1)).isFalse();

}{
	{[]byte("hello"), []byte("hel"), true},
	{[]byte("日本語"), []byte("日本"), true},
	{[]byte("hello"), []byte("Hello, world"), false},
	{[]byte("東京"), []byte("京東"), false},
}

func TestContains(t *testing.T) {
	for _, tt := range containsTests {
		if got := Contains(tt.b, tt.subslice); got != tt.want {
			t.Errorf("Contains(%q, %q) = %v, want %v", tt.b, tt.subslice, got, tt.want)
		}
	}
}

        assertThat(list.isEmpty(), is(true));
        list.addLast("1");
        assertThat(list.isEmpty(), is(not(true)));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testContaines() throws Exception {
        assertThat(list.contains(null), is(not(true)));
        assertThat(list.contains("1"), is(not(true)));
        list.addLast("1");
        assertThat(list.contains("1"), is(true));