Have service_manager start a cloudtail attached to each service it starts.

infra_libs/test/experiments_test.py

Index: infra_libs/test/experiments_test.py
diff --git a/infra_libs/test/experiments_test.py b/infra_libs/test/experiments_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..4f38a775cfbe1bc89a518bdeee6d5e14f1fa2745
--- /dev/null
+++ b/infra_libs/test/experiments_test.py
@@ -0,0 +1,46 @@
+# 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 unittest
+
+import mock
+
+from infra_libs import experiments
+
+
+class ExperimentsTest(unittest.TestCase):
+  def setUp(self):
+    self.mock_getfqdn = mock.patch('socket.getfqdn').start()
+
+  def tearDown(self):
+    mock.patch.stopall()
+
+  def test_is_active_for_host(self):
+    self.mock_getfqdn.return_value = 'vm123-m1'
+
+    self.assertFalse(experiments.is_active_for_host('f1', 0))
+    self.assertFalse(experiments.is_active_for_host('f2', 0))
+    self.assertFalse(experiments.is_active_for_host('f3', 0))
+
+    self.assertTrue(experiments.is_active_for_host('f1', 50))
+    self.assertFalse(experiments.is_active_for_host('f2', 50))
+    self.assertTrue(experiments.is_active_for_host('f3', 50))
+
+    self.assertTrue(experiments.is_active_for_host('f1', 100))
+    self.assertTrue(experiments.is_active_for_host('f2', 100))
+    self.assertTrue(experiments.is_active_for_host('f3', 100))
+
+    self.mock_getfqdn.return_value = 'vm124-m1'
+
+    self.assertFalse(experiments.is_active_for_host('f1', 0))
+    self.assertFalse(experiments.is_active_for_host('f2', 0))
+    self.assertFalse(experiments.is_active_for_host('f3', 0))
+
+    self.assertTrue(experiments.is_active_for_host('f1', 50))
+    self.assertTrue(experiments.is_active_for_host('f2', 50))
+    self.assertFalse(experiments.is_active_for_host('f3', 50))
+
+    self.assertTrue(experiments.is_active_for_host('f1', 100))
+    self.assertTrue(experiments.is_active_for_host('f2', 100))
+    self.assertTrue(experiments.is_active_for_host('f3', 100))