test, #525: allow disabling freeze errors separately

+ cmd: use DEVNULL for non PIPEs; no open-file.
+ TCs: some unitestize-assertions on base & remote TCs.

Author: ankostis

git/cmd.py

@@ -534,6 +534,9 @@ def execute(self, command,
                 cmd_not_found_exception = OSError
         # end handle
 
+        stdout_sink = (PIPE
+                       if with_stdout
+                       else getattr(subprocess, 'DEVNULL', open(os.devnull, 'wb')))
         log.debug("Popen(%s, cwd=%s, universal_newlines=%s, shell=%s)",
                   command, cwd, universal_newlines, shell)
         try:
@@ -543,9 +546,9 @@ def execute(self, command,
                          bufsize=-1,
                          stdin=istream,
                          stderr=PIPE,
-                         stdout=PIPE if with_stdout else open(os.devnull, 'wb'),
+                         stdout=stdout_sink,
                          shell=shell is not None and shell or self.USE_SHELL,
-                         close_fds=(is_posix),  # unsupported on windows
+                         close_fds=is_posix,  # unsupported on windows
                          universal_newlines=universal_newlines,
                          creationflags=PROC_CREATIONFLAGS,
                          **subprocess_kwargs

git/test/test_base.py

@@ -25,7 +25,6 @@
 from git.objects.util import get_object_type_by_name
 from gitdb.util import hex_to_bin
 from git.compat import is_win
-from git.util import HIDE_WINDOWS_KNOWN_ERRORS
 
 
 class TestBase(TestBase):
@@ -42,7 +41,7 @@ def tearDown(self):
     def test_base_object(self):
         # test interface of base object classes
         types = (Blob, Tree, Commit, TagObject)
-        assert len(types) == len(self.type_tuples)
+        self.assertEqual(len(types), len(self.type_tuples))
 
         s = set()
         num_objs = 0
@@ -56,12 +55,12 @@ def test_base_object(self):
                 item = obj_type(self.rorepo, binsha, 0, path)
             # END handle index objects
             num_objs += 1
-            assert item.hexsha == hexsha
-            assert item.type == typename
+            self.assertEqual(item.hexsha, hexsha)
+            self.assertEqual(item.type, typename)
             assert item.size
-            assert item == item
-            assert not item != item
-            assert str(item) == item.hexsha
+            self.assertEqual(item, item)
+            self.assertNotEqual(not item, item)
+            self.assertEqual(str(item), item.hexsha)
             assert repr(item)
             s.add(item)
 
@@ -79,16 +78,16 @@ def test_base_object(self):
 
             tmpfilename = tempfile.mktemp(suffix='test-stream')
             with open(tmpfilename, 'wb+') as tmpfile:
-                assert item == item.stream_data(tmpfile)
+                self.assertEqual(item, item.stream_data(tmpfile))
                 tmpfile.seek(0)
-                assert tmpfile.read() == data
+                self.assertEqual(tmpfile.read(), data)
             os.remove(tmpfilename)
         # END for each object type to create
 
         # each has a unique sha
-        assert len(s) == num_objs
-        assert len(s | s) == num_objs
-        assert num_index_objs == 2
+        self.assertEqual(len(s), num_objs)
+        self.assertEqual(len(s | s), num_objs)
+        self.assertEqual(num_index_objs, 2)
 
     def test_get_object_type_by_name(self):
         for tname in base.Object.TYPES:
@@ -99,7 +98,7 @@ def test_get_object_type_by_name(self):
 
     def test_object_resolution(self):
         # objects must be resolved to shas so they compare equal
-        assert self.rorepo.head.reference.object == self.rorepo.active_branch.object
+        self.assertEqual(self.rorepo.head.reference.object, self.rorepo.active_branch.object)
 
     @with_rw_repo('HEAD', bare=True)
     def test_with_bare_rw_repo(self, bare_rw_repo):
@@ -111,7 +110,7 @@ def test_with_rw_repo(self, rw_repo):
         assert not rw_repo.config_reader("repository").getboolean("core", "bare")
         assert os.path.isdir(os.path.join(rw_repo.working_tree_dir, 'lib'))
 
-    @skipIf(HIDE_WINDOWS_KNOWN_ERRORS, "FIXME: Freezes!")
+    #@skipIf(HIDE_WINDOWS_FREEZE_ERRORS, "FIXME: Freezes!  sometimes...")
     def test_with_rw_remote_and_rw_repo(self):
         with rw_and_rw_remote_repos(self.rorepo, '0.1.6') as (rw_repo, rw_remote_repo):
             assert not rw_repo.config_reader("repository").getboolean("core", "bare")