sourceCodePoint0 = 0,
          sourceCodePoint1 = 0,
          mappedToCodePoints = listOf(1 shl 18),
        ),
      ),
    ).isEqualTo(null)
  }

  private fun mappingOf(
    sourceCodePoint0: Int,
    sourceCodePoint1: Int,
    mappedToCodePoints: List<Int>,
  ): Mapping =
    Mapping(
      sourceCodePoint0 = sourceCodePoint0,
      sourceCodePoint1 = sourceCodePoint1,
      type = TYPE_MAPPED,