Index: translate/storage/test_cpo.py
===================================================================
--- translate/storage/test_cpo.py	(revision 8228)
+++ translate/storage/test_cpo.py	(working copy)
@@ -72,6 +72,16 @@
         unit.addnote("# Double commented comment")
         assert unit.getnotes() == "# Double commented comment"
 
+    def test_typecomment(self):
+        unit = self.UnitClass("Comment")
+        assert unit.gettypecomments() == []
+
+        unit.addtypecomment("c-format")
+        assert unit.hastypecomment("c-format")
+        assert unit.gettypecomments() == ["c-format"]
+
+        assert raises(ValueError, unit.addtypecomment, "invalid-format")
+
 class TestCPOFile(test_po.TestPOFile):
     StoreClass = cpo.pofile
     def test_msgidcomments(self):