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"""Common tests for different targets."""
import glob
import unittest
from fontTools import ttLib
from nototools import coverage
from nototools import font_data
import layout
import roboto_data
def load_fonts(patterns, expected_count=None):
"""Load all fonts specified in the patterns.
Also assert that the number of the fonts found is exactly the same as
expected_count."""
all_font_files = []
for pattern in patterns:
all_font_files += glob.glob(pattern)
all_fonts = [ttLib.TTFont(font) for font in all_font_files]
if expected_count:
assert len(all_font_files) == expected_count
return all_font_files, all_fonts
class FontTest(unittest.TestCase):
"""Parent class for all font tests."""
loaded_fonts = None
class TestItalicAngle(FontTest):
"""Test the italic angle of fonts."""
def setUp(self):
_, self.fonts = self.loaded_fonts
def test_italic_angle(self):
"""Tests the italic angle of fonts to be correct."""
for font in self.fonts:
post_table = font['post']
if 'Italic' in font_data.font_name(font):
expected_angle = -12.0
else:
expected_angle = 0.0
self.assertEqual(post_table.italicAngle, expected_angle)
class TestMetaInfo(FontTest):
"""Test various meta information."""
def setUp(self):
_, self.fonts = self.loaded_fonts
def test_mac_style(self):
"""Tests the macStyle of the fonts to be correct.
Bug: https://code.google.com/a/google.com/p/roboto/issues/detail?id=8
"""
for font in self.fonts:
font_name = font_data.font_name(font)
bold = ('Bold' in font_name) or ('Black' in font_name)
italic = 'Italic' in font_name
expected_mac_style = (italic << 1) | bold
self.assertEqual(font['head'].macStyle, expected_mac_style)
def test_fs_type(self):
"""Tests the fsType of the fonts to be 0.
fsType of 0 marks the font free for installation, embedding, etc.
Bug: https://code.google.com/a/google.com/p/roboto/issues/detail?id=29
"""
for font in self.fonts:
self.assertEqual(font['OS/2'].fsType, 0)
def test_vendor_id(self):
"""Tests the vendor ID of the fonts to be 'GOOG'."""
for font in self.fonts:
self.assertEqual(font['OS/2'].achVendID, 'GOOG')
def test_us_weight(self):
"Tests the usWeight of the fonts to be correct."""
for font in self.fonts:
weight = roboto_data.extract_weight_name(font_data.font_name(font))
expected_numeric_weight = roboto_data.WEIGHTS[weight]
self.assertEqual(
font['OS/2'].usWeightClass,
expected_numeric_weight)
def test_version_numbers(self):
"Tests the two version numbers of the font to be correct."""
for font in self.fonts:
build_number = roboto_data.get_build_number()
expected_version = '2.' + build_number
version = font_data.font_version(font)
usable_part_of_version = version.split(';')[0]
self.assertEqual(usable_part_of_version,
'Version ' + expected_version)
revision = font_data.printable_font_revision(font, accuracy=5)
self.assertEqual(revision, expected_version)
class TestDigitWidths(FontTest):
"""Tests the width of digits."""
def setUp(self):
_, self.fonts = self.loaded_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(FontTest):
"""Tests character coverage."""
def setUp(self):
_, self.fonts = self.loaded_fonts
self.LEGACY_PUA = frozenset({0xEE01, 0xEE02, 0xF6C3})
def test_inclusion_of_legacy_pua(self):
"""Tests that legacy PUA characters remain in the fonts."""
for font in self.fonts:
charset = coverage.character_set(font)
for char in self.LEGACY_PUA:
self.assertIn(char, charset)
def test_non_inclusion_of_other_pua(self):
"""Tests that there are not other PUA characters except legacy ones."""
for font in self.fonts:
charset = coverage.character_set(font)
pua_chars = {
char for char in charset
if 0xE000 <= char <= 0xF8FF or 0xF0000 <= char <= 0x10FFFF}
self.assertTrue(pua_chars <= self.LEGACY_PUA)
def test_lack_of_unassigned_chars(self):
"""Tests that unassigned characters are not in the fonts."""
for font in self.fonts:
charset = coverage.character_set(font)
self.assertNotIn(0x2072, charset)
self.assertNotIn(0x2073, charset)
self.assertNotIn(0x208F, charset)
def test_inclusion_of_sound_recording_copyright(self):
"""Tests that sound recording copyright symbol is in the fonts."""
for font in self.fonts:
charset = coverage.character_set(font)
self.assertIn(
0x2117, charset, # SOUND RECORDING COPYRIGHT
'U+2117 not found in %s.' % font_data.font_name(font))
class TestLigatures(FontTest):
"""Tests formation or lack of formation of ligatures."""
def setUp(self):
self.fontfiles, _ = self.loaded_fonts
def test_lack_of_ff_ligature(self):
"""Tests that the ff ligature is not formed by default."""
for fontfile in self.fontfiles:
advances = layout.get_advances('ff', fontfile)
self.assertEqual(len(advances), 2)
class TestVerticalMetrics(FontTest):
"""Test the vertical metrics of fonts."""
def setUp(self):
_, self.fonts = self.loaded_fonts
def test_ymin_ymax(self):
"""Tests yMin and yMax to be equal to Roboto v1 values.
Android requires this, and web fonts expect this.
"""
for font in self.fonts:
head_table = font['head']
self.assertEqual(head_table.yMin, -555)
self.assertEqual(head_table.yMax, 2163)
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