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#!/usr/bin/python
#
# Copyright 2015 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.
"""Test assumptions that Android relies on."""
import glob
import json
import unittest
from fontTools import ttLib
from nototools import coverage
from nototools import font_data
from nototools import render
from nototools import unicode_data
import common_tests
FONTS = common_tests.load_fonts(
['out/android/*.ttf'],
expected_count=18)
class TestVerticalMetrics(common_tests.TestVerticalMetrics):
loaded_fonts = FONTS
test_glyphs_ymin_ymax = None
test_hhea_table_metrics = None
test_os2_metrics = None
expected_head_yMin = -555
expected_head_yMax = 2163
class TestDigitWidths(unittest.TestCase):
"""Tests the width of digits."""
def setUp(self):
_, self.fonts = load_fonts()
self.digits = [
'zero', 'one', 'two', 'three', 'four',
'five', 'six', 'seven', 'eight', 'nine']
def test_digit_widths(self):
"""Tests all decimal digits to make sure they have the same width."""
for font in self.fonts:
hmtx_table = font['hmtx']
widths = [hmtx_table[digit][0] for digit in self.digits]
self.assertEqual(len(set(widths)), 1)
class TestCharacterCoverage(common_tests.TestCharacterCoverage):
loaded_fonts = FONTS
include = frozenset([
0x2117, # SOUND RECORDING COPYRIGHT
0xEE01, 0xEE02, 0xF6C3]) # legacy PUA
exclude = frozenset([
0x20E3, # COMBINING ENCLOSING KEYCAP
0x2191, # UPWARDS ARROW
0x2193, # DOWNWARDS ARROW
0x2072, 0x2073, 0x208F] + # unassigned characters
range(0xE000, 0xF8FF + 1) + range(0xF0000, 0x10FFFF + 1) # other PUA
) - include # don't exclude legacy PUA
class TestSpacingMarks(unittest.TestCase):
"""Tests that spacing marks are indeed spacing."""
def setUp(self):
self.font_files, _ = load_fonts()
charset = coverage.character_set(self.font_files[0])
self.marks_to_test = [char for char in charset
if unicode_data.category(char) in ['Lm', 'Sk']]
self.advance_cache = {}
def get_advances(self, text, font):
"""Get a list of horizontal advances for text rendered in a font."""
try:
return self.advance_cache[(text, font)]
except KeyError:
hb_output = render.run_harfbuzz_on_text(text, font, '')
hb_output = json.loads(hb_output)
advances = [glyph['ax'] for glyph in hb_output]
self.advance_cache[(text, font)] = advances
return advances
def test_individual_spacing_marks(self):
"""Tests that spacing marks are spacing by themselves."""
for font in self.font_files:
print 'Testing %s for stand-alone spacing marks...' % font
for mark in self.marks_to_test:
mark = unichr(mark)
advances = self.get_advances(mark, font)
assert len(advances) == 1
self.assertNotEqual(advances[0], 0)
def test_spacing_marks_in_combination(self):
"""Tests that spacing marks do not combine with base letters."""
for font in self.font_files:
print 'Testing %s for spacing marks in combination...' % font
for base_letter in (u'A\u00C6BCDEFGHIJKLMNO\u00D8\u01A0PRST'
u'U\u01AFVWXYZ'
u'a\u00E6bcdefghi\u0131j\u0237klmn'
u'o\u00F8\u01A1prs\u017Ftu\u01B0vwxyz'
u'\u03D2'):
print 'Testing %s combinations' % base_letter
for mark in self.marks_to_test:
mark = unichr(mark)
advances = self.get_advances(base_letter + mark, font)
self.assertEqual(len(advances), 2,
'The sequence <%04X, %04X> combines, '
'but it should not' % (ord(base_letter), ord(mark)))
if __name__ == '__main__':
unittest.main()
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