assertParseFails(Integer.toString(-128, radix), radix);
      assertParseFails(Integer.toString(256, radix), radix);
    }
  }

  public void testParseUnsignedByteThrowsExceptionForInvalidRadix() {
    // Valid radix values are Character.MIN_RADIX to Character.MAX_RADIX,
    // inclusive.
    assertThrows(
        NumberFormatException.class,