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#!/usr/bin/python
"""Test assumptions that Android relies on."""
import glob
import unittest
from fontTools import ttLib
def load_fonts():
"""Load all fonts built for Android."""
all_fonts = glob.glob('out/android/*.ttf')
all_fonts = [ttLib.TTFont(font) for font in all_fonts]
return all_fonts
class TestVerticalMetrics(unittest.TestCase):
"""Test the vertical metrics of fonts."""
def setUp(self):
self.fonts = load_fonts()
def test_ymin_ymax(self):
"""Tests yMin and yMax to be equal to what Android expects."""
for font in self.fonts:
head_table = font['head']
self.assertEqual(head_table.yMin, -555)
self.assertEqual(head_table.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)
if __name__ == '__main__':
unittest.main()
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