[Predator] Add local cache for get command output.

appengine/findit/common/test/repo_util_test.py

Index: appengine/findit/common/test/repo_util_test.py
diff --git a/appengine/findit/common/test/repo_util_test.py b/appengine/findit/common/test/repo_util_test.py
index 48c1e22d2db96aaf16ff15749d5640166be7bf4f..154e74f3e4d9d9b305810b950ac068ad5e2ba0d3 100644
--- a/appengine/findit/common/test/repo_util_test.py
+++ b/appengine/findit/common/test/repo_util_test.py
@@ -10,6 +10,7 @@ import textwrap
 import urllib2
 
 from common import repo_util
+from common.cache_decorator import LocalCacher
 
 
 class RepoUtilTest(testing.AppengineTestCase):
@@ -141,7 +142,7 @@ class RepoUtilTest(testing.AppengineTestCase):
         self.command = command
 
       def communicate(self, *_):
-        return self.command, 'dummy'
+        return self.command, 'error'
 
       @property
       def returncode(self):
@@ -152,8 +153,9 @@ class RepoUtilTest(testing.AppengineTestCase):
 
     def _MockPopen(command, **_):
       return _MockProcess(command)
-
     self.mock(subprocess, 'Popen', _MockPopen)
+    self.mock(LocalCacher, 'Get', lambda *_: None)
+
     output = repo_util.GetCommandOutput('command')
     self.assertEqual(output, 'command')