45c08d2858
this adds three new tests for varLib.build:
1) the input designspace contains a single 'weight' axis with <map>
elements that modify the normalization mapping;
2) the input designspace contains two 'weight' and 'width' axes both
with <map> elements, but the 'width' axis only contains identity
mappings;
3) the input designspace contains two 'weight' and 'width' axes, but
only one axis ('weight') has some <map> elements.
The master interpolatable ttx files for 'TestFamily3' are a subset of
Noto Sans containing only the letters to type the word "FontTools".
216 lines
8.0 KiB
Python
216 lines
8.0 KiB
Python
from __future__ import print_function, division, absolute_import
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from fontTools.misc.py23 import *
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from fontTools.ttLib import TTFont
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from fontTools.varLib import build
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from fontTools.varLib import main as varLib_main
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import difflib
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import os
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import shutil
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import sys
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import tempfile
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import unittest
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class BuildTest(unittest.TestCase):
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def __init__(self, methodName):
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unittest.TestCase.__init__(self, methodName)
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# Python 3 renamed assertRaisesRegexp to assertRaisesRegex,
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# and fires deprecation warnings if a program uses the old name.
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if not hasattr(self, "assertRaisesRegex"):
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self.assertRaisesRegex = self.assertRaisesRegexp
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def setUp(self):
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self.tempdir = None
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self.num_tempfiles = 0
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def tearDown(self):
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if self.tempdir:
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shutil.rmtree(self.tempdir)
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@staticmethod
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def get_test_input(test_file_or_folder):
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path, _ = os.path.split(__file__)
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return os.path.join(path, "data", test_file_or_folder)
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@staticmethod
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def get_test_output(test_file_or_folder):
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path, _ = os.path.split(__file__)
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return os.path.join(path, "data", "test_results", test_file_or_folder)
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@staticmethod
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def get_file_list(folder, suffix, prefix=''):
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all_files = os.listdir(folder)
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file_list = []
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for p in all_files:
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if p.startswith(prefix) and p.endswith(suffix):
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file_list.append(os.path.abspath(os.path.join(folder, p)))
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return file_list
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def temp_path(self, suffix):
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self.temp_dir()
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self.num_tempfiles += 1
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return os.path.join(self.tempdir,
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"tmp%d%s" % (self.num_tempfiles, suffix))
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def temp_dir(self):
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if not self.tempdir:
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self.tempdir = tempfile.mkdtemp()
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def read_ttx(self, path):
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lines = []
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with open(path, "r", encoding="utf-8") as ttx:
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for line in ttx.readlines():
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# Elide ttFont attributes because ttLibVersion may change,
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# and use os-native line separators so we can run difflib.
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if line.startswith("<ttFont "):
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lines.append("<ttFont>" + os.linesep)
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else:
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lines.append(line.rstrip() + os.linesep)
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return lines
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def expect_ttx(self, font, expected_ttx, tables):
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path = self.temp_path(suffix=".ttx")
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font.saveXML(path, tables=tables)
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actual = self.read_ttx(path)
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expected = self.read_ttx(expected_ttx)
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if actual != expected:
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for line in difflib.unified_diff(
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expected, actual, fromfile=expected_ttx, tofile=path):
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sys.stdout.write(line)
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self.fail("TTX output is different from expected")
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def check_ttx_dump(self, font, expected_ttx, tables, suffix):
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"""Ensure the TTX dump is the same after saving and reloading the font."""
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path = self.temp_path(suffix=suffix)
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font.save(path)
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self.expect_ttx(TTFont(path), expected_ttx, tables)
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def compile_font(self, path, suffix, temp_dir):
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ttx_filename = os.path.basename(path)
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savepath = os.path.join(temp_dir, ttx_filename.replace('.ttx', suffix))
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font = TTFont(recalcBBoxes=False, recalcTimestamp=False)
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font.importXML(path)
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font.save(savepath, reorderTables=None)
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return font, savepath
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def _run_varlib_build_test(self, designspace_name, font_name, tables,
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expected_ttx_name):
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suffix = '.ttf'
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ds_path = self.get_test_input(designspace_name + '.designspace')
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ufo_dir = self.get_test_input('master_ufo')
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ttx_dir = self.get_test_input('master_ttx_interpolatable_ttf')
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self.temp_dir()
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ttx_paths = self.get_file_list(ttx_dir, '.ttx', font_name + '-')
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for path in ttx_paths:
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self.compile_font(path, suffix, self.tempdir)
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finder = lambda s: s.replace(ufo_dir, self.tempdir).replace('.ufo', suffix)
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varfont, model, _ = build(ds_path, finder)
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expected_ttx_path = self.get_test_output(expected_ttx_name + '.ttx')
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self.expect_ttx(varfont, expected_ttx_path, tables)
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self.check_ttx_dump(varfont, expected_ttx_path, tables, suffix)
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# -----
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# Tests
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# -----
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def test_varlib_build_ttf(self):
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"""Designspace file contains <axes> element."""
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self._run_varlib_build_test(
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designspace_name='Build',
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font_name='TestFamily',
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tables=['GDEF', 'HVAR', 'MVAR', 'fvar', 'gvar'],
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expected_ttx_name='Build'
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)
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def test_varlib_build_no_axes_ttf(self):
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"""Designspace file does not contain an <axes> element."""
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self._run_varlib_build_test(
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designspace_name='InterpolateLayout3',
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font_name='TestFamily2',
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tables=['GDEF', 'HVAR', 'MVAR', 'fvar', 'gvar'],
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expected_ttx_name='Build3'
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)
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def test_varlib_avar_single_axis(self):
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"""Designspace file contains a 'weight' axis with <map> elements
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modifying the normalization mapping. An 'avar' table is generated.
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"""
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test_name = 'BuildAvarSingleAxis'
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self._run_varlib_build_test(
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designspace_name=test_name,
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font_name='TestFamily3',
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tables=['avar'],
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expected_ttx_name=test_name
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)
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def test_varlib_avar_with_identity_maps(self):
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"""Designspace file contains two 'weight' and 'width' axes both with
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<map> elements.
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The 'width' axis only contains identity mappings, however the resulting
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avar segment will not be empty but will contain the default axis value
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maps: {-1.0: -1.0, 0.0: 0.0, 1.0: 1.0}.
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This is to to work around an issue with some rasterizers:
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https://github.com/googlei18n/fontmake/issues/295
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https://github.com/fonttools/fonttools/issues/1011
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"""
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test_name = 'BuildAvarIdentityMaps'
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self._run_varlib_build_test(
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designspace_name=test_name,
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font_name='TestFamily3',
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tables=['avar'],
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expected_ttx_name=test_name
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)
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def test_varlib_avar_empty_axis(self):
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"""Designspace file contains two 'weight' and 'width' axes, but
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only one axis ('weight') has some <map> elements.
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Even if no <map> elements are defined for the 'width' axis, the
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resulting avar segment still contains the default axis value maps:
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{-1.0: -1.0, 0.0: 0.0, 1.0: 1.0}.
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This is again to to work around an issue with some rasterizers:
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https://github.com/googlei18n/fontmake/issues/295
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https://github.com/fonttools/fonttools/issues/1011
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"""
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test_name = 'BuildAvarEmptyAxis'
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self._run_varlib_build_test(
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designspace_name=test_name,
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font_name='TestFamily3',
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tables=['avar'],
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expected_ttx_name=test_name
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)
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def test_varlib_main_ttf(self):
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"""Mostly for testing varLib.main()
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"""
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suffix = '.ttf'
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ds_path = self.get_test_input('Build.designspace')
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ufo_dir = self.get_test_input('master_ufo')
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ttx_dir = self.get_test_input('master_ttx_interpolatable_ttf')
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self.temp_dir()
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ttf_dir = os.path.join(self.tempdir, 'master_ttf_interpolatable')
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os.makedirs(ttf_dir)
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ttx_paths = self.get_file_list(ttx_dir, '.ttx', 'TestFamily-')
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for path in ttx_paths:
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self.compile_font(path, suffix, ttf_dir)
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ds_copy = os.path.join(self.tempdir, 'BuildMain.designspace')
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shutil.copy2(ds_path, ds_copy)
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varLib_main([ds_copy])
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varfont_path = os.path.splitext(ds_copy)[0] + '-VF' + suffix
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varfont = TTFont(varfont_path)
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tables = [table_tag for table_tag in varfont.keys() if table_tag != 'head']
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expected_ttx_path = self.get_test_output('BuildMain.ttx')
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self.expect_ttx(varfont, expected_ttx_path, tables)
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if __name__ == "__main__":
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sys.exit(unittest.main())
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