from fontTools.ttLib import TTFont from fontTools.varLib import build from fontTools.varLib.mutator import main as mutator from fontTools.varLib.mutator import instantiateVariableFont as make_instance import difflib import os import shutil import sys import tempfile import unittest class MutatorTest(unittest.TestCase): def __init__(self, methodName): unittest.TestCase.__init__(self, methodName) # Python 3 renamed assertRaisesRegexp to assertRaisesRegex, # and fires deprecation warnings if a program uses the old name. if not hasattr(self, "assertRaisesRegex"): self.assertRaisesRegex = self.assertRaisesRegexp def setUp(self): self.tempdir = None self.num_tempfiles = 0 def tearDown(self): if self.tempdir: shutil.rmtree(self.tempdir) @staticmethod def get_test_input(test_file_or_folder): path, _ = os.path.split(__file__) return os.path.join(path, "data", test_file_or_folder) @staticmethod def get_test_output(test_file_or_folder): path, _ = os.path.split(__file__) return os.path.join(path, "data", "test_results", test_file_or_folder) @staticmethod def get_file_list(folder, suffix, prefix=''): all_files = os.listdir(folder) file_list = [] for p in all_files: if p.startswith(prefix) and p.endswith(suffix): file_list.append(os.path.abspath(os.path.join(folder, p))) return file_list def temp_path(self, suffix): self.temp_dir() self.num_tempfiles += 1 return os.path.join(self.tempdir, "tmp%d%s" % (self.num_tempfiles, suffix)) def temp_dir(self): if not self.tempdir: self.tempdir = tempfile.mkdtemp() def read_ttx(self, path): lines = [] with open(path, "r", encoding="utf-8") as ttx: for line in ttx.readlines(): # Elide ttFont attributes because ttLibVersion may change, # and use os-native line separators so we can run difflib. if line.startswith("" + os.linesep) else: lines.append(line.rstrip() + os.linesep) return lines def expect_ttx(self, font, expected_ttx, tables): path = self.temp_path(suffix=".ttx") font.saveXML(path, tables=tables) actual = self.read_ttx(path) expected = self.read_ttx(expected_ttx) if actual != expected: for line in difflib.unified_diff( expected, actual, fromfile=expected_ttx, tofile=path): sys.stdout.write(line) self.fail("TTX output is different from expected") def compile_font(self, path, suffix, temp_dir): ttx_filename = os.path.basename(path) savepath = os.path.join(temp_dir, ttx_filename.replace('.ttx', suffix)) font = TTFont(recalcBBoxes=False, recalcTimestamp=False) font.importXML(path) font.save(savepath, reorderTables=None) return font, savepath # ----- # Tests # ----- def test_varlib_mutator_ttf(self): suffix = '.ttf' ds_path = self.get_test_input('Build.designspace') ufo_dir = self.get_test_input('master_ufo') ttx_dir = self.get_test_input('master_ttx_interpolatable_ttf') self.temp_dir() ttx_paths = self.get_file_list(ttx_dir, '.ttx', 'TestFamily-') for path in ttx_paths: self.compile_font(path, suffix, self.tempdir) finder = lambda s: s.replace(ufo_dir, self.tempdir).replace('.ufo', suffix) varfont, _, _ = build(ds_path, finder) varfont_name = 'Mutator' varfont_path = os.path.join(self.tempdir, varfont_name + suffix) varfont.save(varfont_path) args = [varfont_path, 'wght=500', 'cntr=50'] mutator(args) instfont_path = os.path.splitext(varfont_path)[0] + '-instance' + suffix instfont = TTFont(instfont_path) tables = [table_tag for table_tag in instfont.keys() if table_tag != 'head'] expected_ttx_path = self.get_test_output(varfont_name + '.ttx') self.expect_ttx(instfont, expected_ttx_path, tables) def test_varlib_mutator_getvar_ttf(self): suffix = '.ttf' ttx_dir = self.get_test_input('master_ttx_getvar_ttf') self.temp_dir() ttx_paths = self.get_file_list(ttx_dir, '.ttx', 'Mutator_Getvar') for path in ttx_paths: self.compile_font(path, suffix, self.tempdir) varfont_name = 'Mutator_Getvar' varfont_path = os.path.join(self.tempdir, varfont_name + suffix) args = [varfont_path, 'wdth=80', 'ASCN=628'] mutator(args) instfont_path = os.path.splitext(varfont_path)[0] + '-instance' + suffix instfont = TTFont(instfont_path) tables = [table_tag for table_tag in instfont.keys() if table_tag != 'head'] expected_ttx_path = self.get_test_output(varfont_name + '-instance.ttx') self.expect_ttx(instfont, expected_ttx_path, tables) def test_varlib_mutator_iup_ttf(self): suffix = '.ttf' ufo_dir = self.get_test_input('master_ufo') ttx_dir = self.get_test_input('master_ttx_varfont_ttf') self.temp_dir() ttx_paths = self.get_file_list(ttx_dir, '.ttx', 'Mutator_IUP') for path in ttx_paths: self.compile_font(path, suffix, self.tempdir) varfont_name = 'Mutator_IUP' varfont_path = os.path.join(self.tempdir, varfont_name + suffix) args = [varfont_path, 'wdth=80', 'ASCN=628'] mutator(args) instfont_path = os.path.splitext(varfont_path)[0] + '-instance' + suffix instfont = TTFont(instfont_path) tables = [table_tag for table_tag in instfont.keys() if table_tag != 'head'] expected_ttx_path = self.get_test_output(varfont_name + '-instance.ttx') self.expect_ttx(instfont, expected_ttx_path, tables) def test_varlib_mutator_CFF2(self): suffix = '.otf' ttx_dir = self.get_test_input('master_ttx_varfont_otf') self.temp_dir() ttx_paths = self.get_file_list(ttx_dir, '.ttx', 'TestCFF2VF') for path in ttx_paths: self.compile_font(path, suffix, self.tempdir) varfont_name = 'TestCFF2VF' varfont_path = os.path.join(self.tempdir, varfont_name + suffix) expected_ttx_name = 'InterpolateTestCFF2VF' tables = ["hmtx", "CFF2"] loc = {'wght':float(200)} varfont = TTFont(varfont_path) new_font = make_instance(varfont, loc) expected_ttx_path = self.get_test_output(expected_ttx_name + '.ttx') self.expect_ttx(new_font, expected_ttx_path, tables) if __name__ == "__main__": sys.exit(unittest.main())