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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)
+