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. if line.startswith("\n") else: lines.append(line.rstrip() + "\n") 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())