String[] parsed = KuromojiCSVUtil.parse(escaped);
            assertEquals("Roundtrip failed for: " + original, 1, parsed.length);
            assertEquals("Roundtrip failed for: " + original, original, parsed[0]);
        }

        // Test special cases where roundtrip doesn't work due to implementation quirks
        String input;
        String escaped;
        String[] parsed;

    component[builder] = codePointString
    val url = builder.build()
    val expected = component.canonicalize(codePointString)
    val actual = component[url]
    if (expected != actual) {
      fail("Roundtrip $component $codePoint $url $expected != $actual")
    }
  }

  private fun testParseOriginal(
    codePoint: Int,
    codePointString: String,
    encoding: Encoding,
    component: Component,
  ) {