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from fontFeatures import (
Chaining,
Positioning,
ValueRecord,
Routine,
Substitution,
RoutineReference,
FontFeatures,
)
from lxml import etree
import unittest
class TestChaining(unittest.TestCase):
def roundTrip(self, thing, dependencies):
f = FontFeatures()
f.routines.extend(dependencies)
rt = thing.__class__.fromXML(thing.toXML())
f.routines.append(Routine(rules=[rt]))
f.resolveAllRoutines()
self.assertEqual(rt.asFea(), thing.asFea())
def test_simple_pos(self):
v = ValueRecord(xAdvance=120)
pos = Positioning(["a"], [v])
r = Routine(rules=[pos], name="dummy")
rr = RoutineReference(routine=r)
c = Chaining([["a"], ["b"]], lookups=[[rr], None])
self.assertEqual(c.asFea(), "pos a' lookup dummy b';")
xml = c.toXML()
self.assertEqual(
etree.tostring(xml),
'<chaining><lookups><slot><routinereference name="dummy"/></slot><slot><lookup/></slot></lookups><input><slot><glyph>a</glyph></slot><slot><glyph>b</glyph></slot></input></chaining>'.encode(
"utf-8"
),
)
self.roundTrip(c, [r])
def test_simple_sub(self):
pos = Substitution(["a"], ["b"])
r = Routine(rules=[pos], name="dummy")
rr = RoutineReference(routine=r)
c = Chaining([["a"], ["b"]], lookups=[[rr], None])
self.assertEqual(c.asFea(), "sub a' lookup dummy b';")
def test_ignore(self):
c = Chaining([["a"], ["b"]], lookups=[])
self.assertEqual(c.asFea(), "ignore sub a' b';")
def test_complex(self):
pos1 = Substitution(["a"], ["b"])
pos2 = Substitution(["b"], ["c"])
r1 = Routine(rules=[pos1], name="dummy1")
r2 = Routine(rules=[pos2], name="dummy2")
rr1 = RoutineReference(routine=r1)
rr2 = RoutineReference(routine=r2)
c = Chaining([["a"], ["b"]], lookups=[[rr1, rr2], None])
self.assertEqual(c.asFea(), "sub a' lookup dummy1 lookup dummy2 b';")
def test_complex_pos(self):
v = ValueRecord(xAdvance=120)
pos1 = Positioning(["a"], [v])
r1 = Routine(rules=[pos1])
rr1 = RoutineReference(routine=r1)
c = Chaining([["a"], ["b"]], lookups=[[rr1], None])
c.feaPreamble(FontFeatures())
self.assertEqual(c.asFea(), "pos a' lookup ChainedRoutine1 b';")
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