}
          assertEquals(repro.toString(), utf8Length, Utf8.encodedLength(sb));
        }
      }
    }
  }

  public void testEncodedLength_invalidStrings() {
    testEncodedLengthFails(newString(MIN_HIGH_SURROGATE), 0);
    testEncodedLengthFails("foobar" + newString(MIN_HIGH_SURROGATE), 6);
    testEncodedLengthFails(newString(MIN_LOW_SURROGATE), 0);