diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozdevice/tests/sut_ps.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozdevice/tests/sut_ps.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+from sut import MockAgent
+import mozdevice
+import unittest
+
+class PsTest(unittest.TestCase):
+
+    pscommands = [('ps',
+                   "10029	549	com.android.launcher\n"
+                   "10066	1198	com.twitter.android")]
+
+    bad_pscommands = [('ps',
+                       "abcdef	549	com.android.launcher\n"
+                       "10066	1198	com.twitter.android")]
+
+    def test_processList(self):
+        a = MockAgent(self,
+                      commands=self.pscommands)
+        d = mozdevice.DroidSUT("127.0.0.1", port=a.port)
+        pslist = d.getProcessList()
+        self.assertEqual(len(pslist), 2)
+        self.assertEqual(pslist[0], [549, 'com.android.launcher', 10029])
+        self.assertEqual(pslist[1], [1198, 'com.twitter.android', 10066])
+
+        a.wait()
+
+    def test_badProcessList(self):
+        a = MockAgent(self,
+                      commands=self.bad_pscommands)
+        d = mozdevice.DroidSUT("127.0.0.1", port=a.port)
+        exceptionTriggered = False
+        try:
+            d.getProcessList()
+        except mozdevice.DMError:
+            exceptionTriggered = True
+
+        self.assertTrue(exceptionTriggered)
+
+        a.wait()
+
+    def test_processExist(self):
+        for i in [('com.android.launcher', 549),
+                  ('com.fennec.android', None)]:
+            a = MockAgent(self, commands=self.pscommands)
+            d = mozdevice.DroidSUT("127.0.0.1", port=a.port)
+            self.assertEqual(d.processExist(i[0]), i[1])
+            a.wait()
+
+if __name__ == '__main__':
+    unittest.main()