try {
      UnsignedBytes.parseUnsignedByte(value, radix);
      fail();
    } catch (NumberFormatException expected) {
    }
  }

  public void testParseUnsignedByte() {
    // We can easily afford to test this exhaustively.
    for (int i = 0; i <= 0xff; i++) {
      assertThat(UnsignedBytes.parseUnsignedByte(Integer.toString(i))).isEqualTo((byte) i);
    }