Fix a dangerous bug happenning in runUnitTest --save :

Since r23751, unit tests instance have a folder for Extensions, and this folder
is cleaned up before --save. Before r23751, this folder was a symlink to the
real instance home's Extensions, so if you run --save on a test instance
initialized before this change, extensions from your real instance will be
removed.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24206 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/custom_zodb.py

@@ -31,6 +31,7 @@ elif os.environ.get('erp5_save_data_fs'):
   for dir in ('Constraint', 'Document', 'PropertySheet', 'Extensions'):
     full_path = os.path.join(instance_home, dir)
     if os.path.exists(full_path):
+      assert os.path.isdir(full_path)
       for f in glob.glob('%s/*' % full_path):
         os.unlink(f)
   if os.path.exists(new_data_fs_path):

product/ERP5Type/tests/runUnitTest.py

@@ -77,6 +77,15 @@ def initializeInstanceHome(tests_framework_home,
                            instance_home):
   if not os.path.exists(instance_home):
     os.mkdir(instance_home)
+
+  # Before r23751, Extensions dir was initialized to be a symlink to real
+  # instance home Extensions folder, now it's initialized as an independant
+  # folder. If this test instance still have a symlink for Extensions, change
+  # it in a foler.
+  extensions_path = os.path.join(instance_home, 'Extensions')
+  if os.path.islink(extensions_path):
+    os.unlink(extensions_path)
+
   for d in ('Extensions', 'Constraint', 'Document', 'PropertySheet', 'bin', 'etc', 'tests', 'var', 'log'):
     path = os.path.join(instance_home, d)
     if not os.path.exists(path):