[pinpoint] Limit executions to one test run each + device sharding.

dashboard/dashboard/pinpoint/handlers/new_test.py

Index: dashboard/dashboard/pinpoint/handlers/new_test.py
diff --git a/dashboard/dashboard/pinpoint/handlers/new_test.py b/dashboard/dashboard/pinpoint/handlers/new_test.py
index fd1d73d98796bdae383074ab5e75fe91cbfde533..62536cd362165a03ef90ebf985899a8a57aca238 100644
--- a/dashboard/dashboard/pinpoint/handlers/new_test.py
+++ b/dashboard/dashboard/pinpoint/handlers/new_test.py
@@ -95,6 +95,13 @@ class NewTest(testing_common.TestCase):
     response = self.testapp.post('/api/new', _BASE_REQUEST, status=200)
     self.assertEqual({'error': 'message'}, json.loads(response.body))
 
+  @mock.patch.object(api_auth, '_AuthorizeOauthUser', mock.MagicMock())
+  def testPost_InvalidRepeatCount(self):
+    request = dict(_BASE_REQUEST)
+    request['repeat_count'] = 'not_an_int'
+    response = self.testapp.post('/api/new', request, status=200)
+    self.assertIn('error', json.loads(response.body))
+
   @mock.patch.object(api_auth, '_AuthorizeOauthUser', mock.MagicMock())
   def testPost_InvalidBug(self):
     request = dict(_BASE_REQUEST)