MORX–4: Empty Rearrangement

The font for this test case contains an AAT Extended Glyph Metamorphosis Table with a single Rearrangement Subtable. Its finite-state table contains one single state and the following transitions:

For glyph A, the transition carries both the markFirst and markLast bits, so it starts and ends the marked range.
For glyphs B to F, the transitions carry the markLast bit, so they extend the marked range.
For glyphs P to Z, the transitions carry no special flags, and they do not execute any actions.
For glyphs ⓿ to ⓯, the transitions execute the corresponding rearrangement actions on the range that has been marked earlier.

The test strings are crafted to trigger rearrangements on sequences whose variable-length part is empty (x = ε). If your rendering engine implements Apple Advanced Typography, the output should should match the expectations. See also Apple Radar bug 36384131.

	0: No change	1: Aε ⇒ εA	2: εA ⇒ Aε	3: AεD ⇒ DεA
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	4: ABε ⇒ εAB	5: ABε ⇒ εBA	6: εAB ⇒ ABε	7: εAB ⇒ BAε
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Observed
Conformance

	8: AεCD ⇒ CDεA	9: AεCD ⇒ DCεA	10: ABεD ⇒ DεAB	11: ABεD ⇒ DεBA
Expected
Observed
Conformance

	12: ABεCD ⇒ CDεAB	13: ABεCD ⇒ CDεBA	14: ABεCD ⇒ DCεAB	15: ABεCD ⇒ DCεBA
Expected
Observed
Conformance