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instancer_test: add test for null ConditionSet offset

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Cosimo Lupo 2023-07-20 11:15:03 +01:00
parent b0cf3e1ebe
commit 2dcdb17e90
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1 changed files with 18 additions and 0 deletions
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18
Tests/varLib/instancer/instancer_test.py
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@ -1822,6 +1822,24 @@ class InstantiateFeatureVariationsTest(object):
else:
assert not gsub.FeatureList.FeatureRecord
def test_null_conditionset(self):
# A null ConditionSet offset should be treated like an empty ConditionTable, i.e.
# all contexts are matched; see https://github.com/fonttools/fonttools/issues/3211
font = makeFeatureVarsFont(
[([{"wght": (-1.0, 1.0)}], {"uni0024": "uni0024.nostroke"})]
)
gsub = font["GSUB"].table
gsub.FeatureVariations.FeatureVariationRecord[0].ConditionSet = None
location = instancer.NormalizedAxisLimits({"wght": 0.5})
instancer.instantiateFeatureVariations(font, location)
assert not hasattr(gsub, "FeatureVariations")
assert gsub.Version == 0x00010000
lookupIndices = gsub.FeatureList.FeatureRecord[0].Feature.LookupListIndex
assert _getSubstitutions(gsub, lookupIndices) == {"uni0024": "uni0024.nostroke"}
def test_unsupported_condition_format(self, caplog):
font = makeFeatureVarsFont(
[