[varLib.build] Test case and test result

Tests/varLib/build_test.py

@@ -0,0 +1,106 @@
+from __future__ import print_function, division, absolute_import
+from fontTools.misc.py23 import *
+from fontTools.ttLib import TTFont
+from fontTools.varLib import build
+import difflib
+import os
+import shutil
+import sys
+import tempfile
+import unittest
+
+
+class BuildTest(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_file_list(folder, suffix):
+        all_files = os.listdir(folder)
+        return [os.path.abspath(os.path.join(folder, p)) for p in all_files
+                                                          if p.endswith(suffix)]
+
+    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("<ttFont "):
+                    lines.append("<ttFont>" + 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_build_ttf(self):
+        suffix = '.ttf'
+        ds_path = self.get_test_input('BuildTest.designspace')
+        ufo_dir = self.get_test_input('master_ufo')
+        ttx_dir = self.get_test_input('master_ttx_interpolatable_ttf')
+
+        ttx_paths = self.get_file_list(ttx_dir, '.ttx')
+        self.temp_dir()
+        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, model, _ = build(ds_path, finder)
+
+        tables = ['GDEF', 'HVAR', 'fvar', 'gvar']
+        #varfont.save(ds_path.replace('.designspace', suffix))
+        #varfont.saveXML(ds_path.replace('.designspace', '.ttx'), tables=tables)
+        self.expect_ttx(varfont, self.get_test_input('BuildTest.ttx'), tables)
+
+
+if __name__ == "__main__":
+    sys.exit(unittest.main())