Chop off platform name from step name

appengine/findit/waterfall/test/try_job_util_test.py

Index: appengine/findit/waterfall/test/try_job_util_test.py
diff --git a/appengine/findit/waterfall/test/try_job_util_test.py b/appengine/findit/waterfall/test/try_job_util_test.py
index 8e8a458eb17880177f9471675c31b6dfe8327bdd..becdeaefacf9657751a1ade871447c986d17023f 100644
--- a/appengine/findit/waterfall/test/try_job_util_test.py
+++ b/appengine/findit/waterfall/test/try_job_util_test.py
@@ -1268,6 +1268,14 @@ class TryJobUtilTest(wf_testcase.WaterfallTestCase):
             signals, 'master1', 'builder1'),
         ['b.o'])
 
+  def testRemovePlatformFromStepName(self):
+    self.assertEqual('a_tests',
+        try_job_util._RemovePlatformFromStepName('a_tests on Platform'))
+    self.assertEqual('a_tests',
+        try_job_util._RemovePlatformFromStepName('a_tests on Other-Platform'))
+    self.assertEqual('a_tests',
+        try_job_util._RemovePlatformFromStepName('a_tests'))
+
   def testGetSuspectedCLsWithFailuresNoHeuristicResult(self):
     heuristic_result = None
     expected_suspected_revisions = []