tc: HALF FIX of test_pack_entity ()

+ On Windows, you cannot write onto a file held by another live
file-pointer (test_pack.py:#L204).
+ The TC fails later, on clean up (the usual).

Author: ankostis

Diff for: gitdb/test/test_pack.py

@@ -188,15 +188,18 @@ def test_pack_entity(self, rw_dir):
 
         # pack writing - write all packs into one
         # index path can be None
-        pack_path = tempfile.mktemp('', "pack", rw_dir)
+        pack_path1 = tempfile.mktemp('', "pack1", rw_dir)
+        pack_path2 = tempfile.mktemp('', "pack2", rw_dir)
         index_path = tempfile.mktemp('', 'index', rw_dir)
         iteration = 0
 
         def rewind_streams():
             for obj in pack_objs:
                 obj.stream.seek(0)
         # END utility
-        for ppath, ipath, num_obj in zip((pack_path, ) * 2, (index_path, None), (len(pack_objs), None)):
+        for ppath, ipath, num_obj in zip((pack_path1, pack_path2),
+                                         (index_path, None),
+                                         (len(pack_objs), None)):
             iwrite = None
             if ipath:
                 ifile = open(ipath, 'wb')
@@ -214,7 +217,7 @@ def rewind_streams():
             assert os.path.getsize(ppath) > 100
 
             # verify pack
-            pf = PackFile(ppath)
+            pf = PackFile(ppath)  # FIXME: Leaks file-pointer(s)!
             assert pf.size() == len(pack_objs)
             assert pf.version() == PackFile.pack_version_default
             assert pf.checksum() == pack_sha