Add support for repeated keys in TaskRequest.

appengine/swarming/local_smoke_test.py

Index: appengine/swarming/local_smoke_test.py
diff --git a/appengine/swarming/local_smoke_test.py b/appengine/swarming/local_smoke_test.py
index 7d17f50abea607b7790d9e2790a012b2c40b3b66..ed857227ccb3bec98dc7abf687fe1f574b292e25 100755
--- a/appengine/swarming/local_smoke_test.py
+++ b/appengine/swarming/local_smoke_test.py
@@ -339,15 +339,29 @@ class Test(unittest.TestCase):
     # A string of a letter 'A', UTF-8 BOM then UTF-16 BOM then UTF-EDBCDIC then
     # invalid UTF-8 and the letter 'B'. It is double escaped so it can be passed
     # down the shell.
+    #
+    # Also confirm that a bot can run with multiple keys. Assume there's at
+    # least 2 'os' values.
     invalid_bytes = 'A\\xEF\\xBB\\xBF\\xFE\\xFF\\xDD\\x73\\x66\\x73\\xc3\\x28B'
     args = [
+      '--dimension', 'os', self.dimensions[u'os'][0],
+      '--dimension', 'os', self.dimensions[u'os'][1],
       '-T', 'non_utf8', '--',
       'python', '-u', '-c', 'print(\'' + invalid_bytes + '\')',
     ]
+    tags = [
+      u'os:%s' % self.dimensions[u'os'][0],
+      u'os:%s' % self.dimensions[u'os'][1],
+      u'pool:default',
+      u'priority:100',
+      u'service_account:none',
+      u'user:joe@localhost',
+    ]
     summary = self.gen_expected(
         name=u'non_utf8',
         # The string is mostly converted to 'Replacement Character'.
-        outputs=[u'A\ufeff\ufffd\ufffd\ufffdsfs\ufffd(B\n'])
+        outputs=[u'A\ufeff\ufffd\ufffd\ufffdsfs\ufffd(B\n'],
+        tags=tags)
     self.assertOneTask(args, summary, {})
 
   def test_invalid_command(self):
@@ -613,8 +627,10 @@ class Test(unittest.TestCase):
           u'items_hot': [],
         },
       },
+      # Intentionally hardcode the hash here to confirm consistency in the
+      # hashing mechanism.
       properties_hash =
-          u'082928de84d0a65839d227dcea2f5a947898929c77c1602b68c46d7d4588c1f5',
+          u'7340823890f29ffa64f81448517c541ebf4fc7b9ce5541bab05f3edda0cadafe',
     )
     task_id = self._run_isolated(
         hello_world, 'idempotent_reuse', ['--idempotent'], expected_summary, {})