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# Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import tempfile
import unittest
from nototools.gpos_diff import GposDiffFinder
from hb_input_test import make_font
class GposDiffFinderText(unittest.TestCase):
def _expect_kerning_diffs(self, source_a, source_b, pairs, values):
font_a = make_font('feature kern {\n%s\n} kern;' % source_a)
font_b = make_font('feature kern {\n%s\n} kern;' % source_b)
file_a = tempfile.NamedTemporaryFile()
file_b = tempfile.NamedTemporaryFile()
font_a.save(file_a.name)
font_b.save(file_b.name)
finder = GposDiffFinder(file_a.name, file_b.name, 0, 100)
diffs = finder.find_kerning_diffs()
self.assertIn('%d differences in kerning pairs' % len(pairs), diffs)
for pair_diff in pairs:
self.assertIn('%s pos %s %s %s' % pair_diff, diffs)
self.assertIn('%d differences in kerning values' % len(values), diffs)
for value_diff in values:
self.assertIn('pos %s %s: %s vs %s' % value_diff, diffs)
def test_simple(self):
self._expect_kerning_diffs('''
pos a b -10;
pos a c -20;
''', '''
pos a b -30;
pos a d -40;
''',
[('-', 'a', 'c', [-20]), ('+', 'a', 'd', [-40])],
[('a', 'b', [-10], [-30])])
def test_multiple_rules(self):
self._expect_kerning_diffs('''
@a_b = [a b];
pos a d -10;
pos @a_b d -20;
''', '''
pos a d -30;
''',
[('-', 'b', 'd', [-20])],
[('a', 'd', [-10, -20], [-30])])
def test_single_vs_class(self):
self._expect_kerning_diffs('''
pos a d -10;
''', '''
@a_b = [a b];
pos @a_b d -20;
''',
[('+', 'b', 'd', [-20])],
[('a', 'd', [-10], [-20])])
if __name__ == '__main__':
unittest.main()
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