assertThat(
      inlineDeltaOrNull(
        mappingOf(
          sourceCodePoint0 = 0,
          sourceCodePoint1 = 0,
          mappedToCodePoints = listOf((1 shl 18) - 1),
        ),
      ),
    ).isEqualTo(
      InlineDelta(
        rangeStart = 0,
        codepointDelta = InlineDelta.MAX_VALUE,
      ),
    )

    assertThat(
      inlineDeltaOrNull(