<mxGeometry x="-60" y="-540" width="330" height="260" as="geometry"/>
                </mxCell>

                    <mxGeometry x="-60" y="-540" width="330" height="260" as="geometry"/>
                </mxCell>

  fun largeRead() {
    val data = randomByteString(1000000)
    write(data)
    val operator =
      FileOperator(
        randomAccessFile!!.getChannel(),
      )
    val buffer = Buffer()
    operator.read(0, buffer, data.size.toLong())
    assertThat(buffer.readByteString()).isEqualTo(data)
  }

  @Test
  fun largeWrite() {
    val data = randomByteString(1000000)
    val operator =
      FileOperator(

      mergeAdjacentRanges(
        listOf(
          Mapping(0x0000, 0x002c, TYPE_DISALLOWED_STD3_VALID, ByteString.EMPTY),
        ),
      ),
    ).containsExactly(
      Mapping(0x0000, 0x002c, TYPE_VALID, ByteString.EMPTY),
    )
  }

  @Test fun simplifyCombinesCanonicalEquivalent() {
    assertThat(
      mergeAdjacentRanges(
        listOf(
          Mapping(0x0000, 0x002c, TYPE_DISALLOWED_STD3_VALID, ByteString.EMPTY),

   E000-F8FF; [PRIVATE USE, PLANE 0]
   F0000-FFFFD; [PRIVATE USE, PLANE 15]

    return result
  }

  override fun toString(): String = "$tagClass/$tag"

  companion object {
    const val TAG_CLASS_UNIVERSAL = 0b0000_0000
    const val TAG_CLASS_APPLICATION = 0b0100_0000
    const val TAG_CLASS_CONTEXT_SPECIFIC = 0b1000_0000
    const val TAG_CLASS_PRIVATE = 0b1100_0000

    const val TAG_END_OF_CONTENTS = 0L
  }

   1D4C5-1D505
   1D507-1D50A
   1D50D-1D514
   1D516-1D51C
   1D51E-1D539
   1D53B-1D53E
   1D540-1D544
   1D546
   1D54A-1D550
   1D552-1D6A3
   1D6A8-1D7C9
   20000-2A6D6
   2F800-2FA1D
   F0000-FFFFD