tests: fixes for issues uncovered when moving to python 3.6.

This includes a few fixes found when testing with python 3.6.
 - fix eni renderer when target is None
   This just uses the util.target_path() in the event that target is None.
 - change test cases to not rely on the cached result of
   util.get_cmdline() and other cached globals. Update the base TestCase
   to unset that cache.
 - mock calls to system_is_snappy from the create_users test cases.
 - drop unused _pp_root in test_simple_run.py

LP: #1703697

1 files changed, 0 insertions, 18 deletions

diff --git a/tests/unittests/test_runs/test_simple_run.py b/tests/unittests/test_runs/test_simple_run.py
index 31324204..55f15b55 100644
--- a/tests/unittests/test_runs/test_simple_run.py
+++ b/tests/unittests/test_runs/test_simple_run.py
@@ -16,24 +16,6 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         self.patchOS(root)
         self.patchUtils(root)
 
-    def _pp_root(self, root, repatch=True):
-        for (dirpath, dirnames, filenames) in os.walk(root):
-            print(dirpath)
-            for f in filenames:
-                joined = os.path.join(dirpath, f)
-                if os.path.islink(joined):
-                    print("f %s - (symlink)" % (f))
-                else:
-                    print("f %s" % (f))
-            for d in dirnames:
-                joined = os.path.join(dirpath, d)
-                if os.path.islink(joined):
-                    print("d %s - (symlink)" % (d))
-                else:
-                    print("d %s" % (d))
-        if repatch:
-            self._patchIn(root)
-
     def test_none_ds(self):
         new_root = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, new_root)