//     || byte1 == (byte) 0xF4 && byte2 > (byte) 0x8F)
            || (((byte1 << 28) + (byte2 - (byte) 0x90)) >> 30) != 0
            // Third byte trailing-byte test
            || bytes[index++] > (byte) 0xBF
            // Fourth byte trailing-byte test
            || bytes[index++] > (byte) 0xBF) {
          return false;
        }
      }
    }
  }

    String test = "abc" + Character.MIN_HIGH_SURROGATE;
    try {
      escapeAsString(NOP_ESCAPER, test);
      fail("Trailing high surrogate should cause exception");
    } catch (IllegalArgumentException expected) {
      // Pass
    }
    try {
      escapeAsString(SIMPLE_ESCAPER, test);
      fail("Trailing high surrogate should cause exception");
    } catch (IllegalArgumentException expected) {
      // Pass
    }
  }

      }
      dummy ^= sb.toString().length();
    }
    return dummy;
  }

  /**
   * Always append the delimiter after the component, and in the very end shortens the buffer to get
   * rid of the extra trailing delimiter.
   */
  @Benchmark
  int alwaysAppendThenBackUp(int reps) {
    int dummy = 0;
    for (int i = 0; i < reps; i++) {
      StringBuilder sb = new StringBuilder();

      }
      dummy ^= sb.toString().length();
    }
    return dummy;
  }

  /**
   * Always append the delimiter after the component, and in the very end shortens the buffer to get
   * rid of the extra trailing delimiter.
   */
  @Benchmark
  int alwaysAppendThenBackUp(int reps) {
    int dummy = 0;
    for (int i = 0; i < reps; i++) {
      StringBuilder sb = new StringBuilder();

    String expected = expectedLines.isEmpty() ? "" : Joiner.on(separator).join(expectedLines);
    if (!lines.isEmpty()) {
      // if we wrote any lines in writeLines(), there will be a trailing newline
      expected += separator;
    }
    assertEquals(expected, factory.getSinkContents());
  }

            //     || byte1 == (byte) 0xF4 && byte2 > (byte) 0x8F)
            || (((byte1 << 28) + (byte2 - (byte) 0x90)) >> 30) != 0
            // Third byte trailing-byte test
            || bytes[index++] > (byte) 0xBF
            // Fourth byte trailing-byte test
            || bytes[index++] > (byte) 0xBF) {
          return false;
        }
      }
    }
  }

    return asCharSource(url, charset).readLines(callback);
  }

  /**
   * Reads all of the lines from a URL. The lines do not include line-termination characters, but do
   * include other leading and trailing whitespace.
   *
   * <p>This method returns a mutable {@code List}. For an {@code ImmutableList}, use {@code
   * Resources.asCharSource(url, charset).readLines()}.
   *
   * @param url the URL to read from

    String test = "abc" + Character.MIN_HIGH_SURROGATE;
    try {
      escapeAsString(NOP_ESCAPER, test);
      fail("Trailing high surrogate should cause exception");
    } catch (IllegalArgumentException expected) {
      // Pass
    }
    try {
      escapeAsString(SIMPLE_ESCAPER, test);
      fail("Trailing high surrogate should cause exception");
    } catch (IllegalArgumentException expected) {
      // Pass
    }
  }

    String expected = expectedLines.isEmpty() ? "" : Joiner.on(separator).join(expectedLines);
    if (!lines.isEmpty()) {
      // if we wrote any lines in writeLines(), there will be a trailing newline
      expected += separator;
    }
    assertEquals(expected, factory.getSinkContents());
  }