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Test adding FeatureVariations with an existing 'rclt' feature

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This commit is contained in:
justvanrossum 2019-10-20 09:19:40 +02:00
parent 7bfeb1ab97
commit e2bac99eb8
1 changed files with 47 additions and 2 deletions
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49
Tests/varLib/varLib_test.py
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@ -7,6 +7,7 @@ from fontTools.varLib import set_default_weight_width_slant
from fontTools.designspaceLib import (
DesignSpaceDocumentError, DesignSpaceDocument, SourceDescriptor,
)
from fontTools.feaLib.builder import addOpenTypeFeaturesFromString
import difflib
import os
import shutil
@ -107,7 +108,8 @@ class BuildTest(unittest.TestCase):
return font, savepath
def _run_varlib_build_test(self, designspace_name, font_name, tables,
expected_ttx_name, save_before_dump=False):
expected_ttx_name, save_before_dump=False,
post_process_master=None):
suffix = '.ttf'
ds_path = self.get_test_input(designspace_name + '.designspace')
ufo_dir = self.get_test_input('master_ufo')
@ -116,7 +118,9 @@ class BuildTest(unittest.TestCase):
self.temp_dir()
ttx_paths = self.get_file_list(ttx_dir, '.ttx', font_name + '-')
for path in ttx_paths:
self.compile_font(path, suffix, self.tempdir)
font, savepath = self.compile_font(path, suffix, self.tempdir)
if post_process_master is not None:
post_process_master(font, savepath)
finder = lambda s: s.replace(ufo_dir, self.tempdir).replace('.ufo', suffix)
varfont, model, _ = build(ds_path, finder)
@ -213,6 +217,47 @@ class BuildTest(unittest.TestCase):
save_before_dump=True,
)
def test_varlib_build_feature_variations_with_existing_rclt(self):
"""Designspace file contains <rules> element, used to build GSUB
FeatureVariations table. <rules> is specified to do its OT processing
"last", so a 'rclt' feature will be used or created. This test covers
the case when a 'rclt' already exists in the masters.
We dynamically add a 'rclt' feature to an existing set of test
masters, to avoid adding more test data.
The multiple languages are done to verify whether multiple existing
'rclt' features are updated correctly.
"""
def add_rclt(font, savepath):
features = """
languagesystem DFLT dflt;
languagesystem latn dflt;
languagesystem latn NLD;
feature rclt {
script latn;
language NLD;
lookup A {
sub uni0041 by uni0061;
} A;
language dflt;
lookup B {
sub uni0041 by uni0061;
} B;
} rclt;
"""
addOpenTypeFeaturesFromString(font, features)
font.save(savepath)
self._run_varlib_build_test(
designspace_name="FeatureVars",
font_name="TestFamily",
tables=["fvar", "GSUB"],
expected_ttx_name="FeatureVars_rclt",
save_before_dump=True,
post_process_master=add_rclt,
)
def test_varlib_gvar_explicit_delta(self):
"""The variable font contains a composite glyph odieresis which does not
need a gvar entry, because all its deltas are 0, but it must be added