test_glifLib: add basic roundtrip test for read/write glif/string functions

Lib/ufoLib/test/test_glifLib.py

@@ -4,8 +4,9 @@ import shutil
 import unittest
 from io import open
 from ufoLib.test.testSupport import getDemoFontGlyphSetPath
-from ufoLib.glifLib import GlyphSet, glyphNameToFileName
+from ufoLib.glifLib import (
-
+	GlyphSet, glyphNameToFileName, readGlyphFromString, writeGlyphToString
+)
 
 GLYPHSETDIR = getDemoFontGlyphSetPath()
 
@@ -136,6 +137,26 @@ class FileNameTests(unittest.TestCase):
 		self.assertEqual(glyphNameToFileName("alt.con", None), "alt._con.glif")
 
 
+class ReadWriteFuncTest(unittest.TestCase):
+
+	def testRoundTrip(self):
+		class _Glyph(object):
+			pass
+
+		glyph = _Glyph()
+		glyph.name = "a"
+		glyph.unicodes = [0x0061]
+
+		s1 = writeGlyphToString(glyph.name, glyph)
+
+		glyph2 = _Glyph()
+		readGlyphFromString(s1, glyph2)
+		self.assertEqual(glyph.__dict__, glyph2.__dict__)
+
+		s2 = writeGlyphToString(glyph2.name, glyph2)
+		self.assertEqual(s1, s2)
+
+
 if __name__ == "__main__":
 	from ufoLib.test.testSupport import runTests
 	import sys