Make simpler test in cffLib tests

Tests/cffLib/cffLib_test.py

@@ -2,6 +2,8 @@ from __future__ import print_function, division, absolute_import
 from fontTools.cffLib import TopDict, PrivateDict, CharStrings
 from fontTools.misc.testTools import parseXML, DataFilesHandler
 from fontTools.ttLib import TTFont
+import copy
+import os
 import sys
 import unittest
 
@@ -59,6 +61,21 @@ class CffLibTest(DataFilesHandler):
         topDict2 = font2["CFF "].cff.topDictIndex[0]
         self.assertEqual(topDict2.Encoding[32], "space")
 
+    def test_CFF_deepcopy(self):
+        """Test that deepcopying a TTFont with a CFF table does not recurse
+        infinitely."""
+        ttx_path = os.path.join(
+            os.path.dirname(__file__),
+            "..",
+            "varLib",
+            "data",
+            "master_ttx_interpolatable_otf",
+            "TestFamily2-Master0.ttx",
+        )
+        font = TTFont(recalcBBoxes=False, recalcTimestamp=False)
+        font.importXML(ttx_path)
+        copy.deepcopy(font)
+
 
 if __name__ == "__main__":
     sys.exit(unittest.main())

Tests/varLib/interpolate_layout_test.py

@@ -162,22 +162,6 @@ class InterpolateLayoutTest(unittest.TestCase):
         with self.assertRaisesRegex(DesignSpaceDocumentError, "No axes defined"):
             instfont = interpolate_layout(ds_path, {'weight': 500})
 
-    def test_varlib_interpolate_layout_GSUB_only_otf(self):
-        """A smoke-test for layout-interpolating of OTFs."""
-        ds_path = self.get_test_input('InterpolateLayout.designspace')
-        ds = DesignSpaceDocument.fromfile(ds_path)
-        ttx_dir = self.get_test_input('master_ttx_interpolatable_otf')
-
-        self.temp_dir()
-        ttx_paths = self.get_file_list(ttx_dir, '.ttx', 'TestFamily2-')
-        for path, source in zip(ttx_paths, ds.sources):
-            font = TTFont(recalcBBoxes=False, recalcTimestamp=False)
-            font.importXML(path)
-            source.font = font
-
-        finder = lambda s: s
-        instfont = interpolate_layout(ds, {'weight': 500}, finder)
-
     def test_varlib_interpolate_layout_GPOS_only_size_feat_same_val_ttf(self):
         """Only GPOS; 'size' feature; same values in all masters.
         """