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from fontFeatures import Substitution, FontFeatures
from fontTools.ttLib import TTFont
from fontFeatures.ttLib.GSUBUnparser import GSUBUnparser
from fontFeatures.ttLib import unparseLanguageSystems
import pprint
import unittest
class TestUnparse(unittest.TestCase):
font = TTFont("fonts/Amiri-Regular.ttf")
lookups = font["GSUB"].table.LookupList.Lookup
ff = FontFeatures()
unparser = GSUBUnparser(font["GSUB"], ff, [])
def test_single(self):
g, _ = self.unparser.unparseLookup(self.lookups[1], 1) # part of locl
self.assertEqual(g.rules[0].asFea(), "sub period by period.ara;")
self.assertEqual(g.rules[1].asFea(), "sub guillemotleft by guillemotleft.ara;")
def test_ligature(self):
g, _ = self.unparser.unparseLookup(self.lookups[0], 0) # part of ccmp
self.assertEqual(g.rules[0].asFea(), "sub uni0627 uni065F by uni0673;")
def test_multiple(self):
g, _ = self.unparser.unparseLookup(self.lookups[10], 10)
self.assertEqual(g.rules[0].asFea(), "sub uni08B6 by uni0628 smallmeem.above;")
def test_ignore(self):
g, _ = self.unparser.unparseLookup(self.lookups[47], 47)
self.unparser.lookups = [None] * 47 + [g]
assert self.unparser.lookups[47]
g, _ = self.unparser.unparseLookup(self.lookups[48], 48)
self.assertEqual(
g.rules[0].asFea(),
"ignore sub [uni0622 uni0627 uni0648 uni0671 uni0627.fina uni0671.fina] uni0644.init' uni0644.medi' [uni0647.fina uni06C1.fina];",
)
# def test_chaining(self):
# self.unparser.unparseLookups()
# g, _ = self.unparser.unparseLookup(
# self.lookups[33], 33
# ) # part of calt in quran.fea
# self.assertEqual(
# g.rules[0].asFea(),
# "sub uni0644' lookup SingleSubstitution32 uni0621' lookup SingleSubstitution31 uni0627' lookup SingleSubstitution32;",
# )
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