Nafees Nastaleeq test cases

yeh baree with hamza above

code points	v1.00	v1.01
0635:     ARABIC LETTER SAD 062F:     ARABIC LETTER DAL 0627:     ARABIC LETTER ALEF 0020:     SPACE 06D3:     ARABIC LETTER YEH BARREE WITH HAMZA ABOVE 0020:     SPACE 0628:     ARABIC LETTER BEH 0644:     ARABIC LETTER LAM 0646:     ARABIC LETTER NOON 062F:     ARABIC LETTER DAL	صدا ۓ بلند	صدا ۓ بلند
0635:     ARABIC LETTER SAD 062F:     ARABIC LETTER DAL 0627:     ARABIC LETTER ALEF 06D3:     ARABIC LETTER YEH BARREE WITH HAMZA ABOVE 0628:     ARABIC LETTER BEH 0644:     ARABIC LETTER LAM 0646:     ARABIC LETTER NOON 062F:     ARABIC LETTER DAL	صداۓبلند	صداۓبلند
0635:     ARABIC LETTER SAD 062F:     ARABIC LETTER DAL 0627:     ARABIC LETTER ALEF 0020:     SPACE 06D2:     ARABIC LETTER YEH BARREE 0654:     ARABIC HAMZA ABOVE 0628:     ARABIC LETTER BEH 0644:     ARABIC LETTER LAM 0646:     ARABIC LETTER NOON 062F:     ARABIC LETTER DAL	صدا ۓبلند	صدا ۓبلند
0635:     ARABIC LETTER SAD 062F:     ARABIC LETTER DAL 0627:     ARABIC LETTER ALEF 06D2:     ARABIC LETTER YEH BARREE 0654:     ARABIC HAMZA ABOVE 0628:     ARABIC LETTER BEH 0644:     ARABIC LETTER LAM 0646:     ARABIC LETTER NOON 062F:     ARABIC LETTER DAL	صداۓبلند	صداۓبلند

The shape of the yeh baree with precomposed vs decomposed characters is different. Since these are supposed to be canonically equivalent, I thought this must be an error.

yeh with hamza above

code points	v1.00	v1.01
0648:     ARABIC LETTER WAW 0644:     ARABIC LETTER LAM 0626:     ARABIC LETTER YEH WITH HAMZA ABOVE 0020:    SPACE 06A9:     ARABIC LETTER KEHEH 0627:     ARABIC LETTER ALEF 0645:     ARABIC LETTER MEEM	ولئ کام	ولئ کام
0648:     ARABIC LETTER WAW 0644:     ARABIC LETTER LAM 0626:     ARABIC LETTER YEH WITH HAMZA ABOVE 06A9:     ARABIC LETTER KEHEH 0627:     ARABIC LETTER ALEF 0645:     ARABIC LETTER MEEM	ولئکام	ولئکام
0648:     ARABIC LETTER WAW 0644:     ARABIC LETTER LAM 064A:     ARABIC LETTER YEH 0654:     ARABIC HAMZA ABOVE 06A9:     ARABIC LETTER KEHEH 0627:     ARABIC LETTER ALEF 0645:     ARABIC LETTER MEEM	ولئکام	ولئکام
0648:     ARABIC LETTER WAW 0644:     ARABIC LETTER LAM 06CC:     ARABIC LETTER FARSI YEH 0654:     ARABIC HAMZA ABOVE 06A9:     ARABIC LETTER KEHEH 0627:     ARABIC LETTER ALEF 0645:     ARABIC LETTER MEEM	ولیٔکام	ولیٔکام

Here I am trying to reproduce a yeh with hamza above for the izafat.

The 1.01 font seems to force you to never have a space or end of text after the precomposed ARABIC LETTER YEH WITH HAMZA ABOVE: otherwise a dotted circle remains (also in the PDF file listing the characters in the font that accompanies the font download). Note that this seems inconsistent with use of the izafat in the following, where I think a space is needed to achieve the correct form of beh: طالبِ علم

The other thing I am confused about is that ARABIC LETTER YEH WITH HAMZA ABOVE canonically decomposes into ARABIC LETTER YEH plus HAMZA ABOVE in NFD, whereas the font doesn't provide a glyph for ARABIC LETTER YEH. I would have expected that to achieve yeh with hamza the font would make you use ARABIC LETTER FARSI YEH and ARABIC HAMZA ABOVE (there is no precomposed form of this combination that I'm aware of). Using the farsi yeh makes sense in my mind because the hamza is not always shown in this izafat situation, as I understand it. That would mean that the user would use ARABIC LETTER FARSI YEH. That then would lead to an issue, surely, when comparing the same text with and without the hamza: it should be considered the same, but will use different characters when decomposition takes place prior to collation.