Add master_manager_launch script which launches master_manager scripts for each master on a host.

infra/libs/buildbot/test/master_test.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import collections
 import json
 import os
 import requests
 import simplejson
 import subprocess
@@ skipping 137 matching lines @@
       raise requests.exceptions.Timeout('timeout')
     self.mock(requests, 'get', timeout)
     self.assertIsNone(master.get_accepting_builds(self.chromium_fyi))
 
   def testConnectionErr(self):
     def timeout(*_args, **_kwargs):
       raise requests.exceptions.ConnectionError('error')
     self.mock(requests, 'get', timeout)
     self.assertIsNone(master.get_accepting_builds(self.chromium_fyi))
 
+  def testMastermapHost(self):
+    masters = [
+        {'fullhost': 'bananas.cool'},
+        {'fullhost': 'bananas.cool'},
+        {'fullhost': 'bananas_dos.cool'},
+    ]
+    self.mock(master, '_call_mastermap', lambda _x: masters)
+
+    self.assertEqual(
+        len(master.get_mastermap_for_host('fake', 'bananas.cool')),
+        2)
+
 class TestMasterManipulation(auto_stub.TestCase):
   def setUp(self):
     super(TestMasterManipulation, self).setUp()
     self.chromium_fyi = os.path.join(DATA_DIR, 'master.chromium.fyi')
 
   def testWithGclientSyncEnabled(self):
     actions = list(master.convert_action_items_to_cli((
       master.GclientSync,
       master.MakeStop,
       master.MakeWait,
@@ skipping 21 matching lines @@
     self.assertEquals(
         [a['cmd'] for a in actions],
         [
           ['make', 'stop'],
         ],
     )
 
   def testInvalid(self):
     with self.assertRaises(ValueError):
       list(master.convert_action_items_to_cli((-100,), self.chromium_fyi))