Add infra_libs as a bootstrap dependency.

infra_libs/ts_mon/common/test/errors_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 unittest
-
-from infra_libs.ts_mon.common import errors
-
-class ErrorsTest(unittest.TestCase):
-
-  ERRORS = [
-      (errors.MonitoringDecreasingValueError, ('test', 1, 0)),
-      (errors.MonitoringDuplicateRegistrationError, ('test',)),
-      (errors.MonitoringIncrementUnsetValueError, ('test',)),
-      (errors.MonitoringInvalidValueTypeError, ('test', 'foo')),
-      (errors.MonitoringInvalidFieldTypeError, ('test', 'foo', 'bar')),
-      (errors.MonitoringTooManyFieldsError, ('test', {'foo': 'bar'})),
-      (errors.MonitoringNoConfiguredMonitorError, ('test',)),
-      (errors.MonitoringNoConfiguredMonitorError, (None,)),
-      (errors.MonitoringNoConfiguredTargetError, ('test',)),
-      (errors.UnknownModificationTypeError, ('foo',)),
-  ]
-
-  def test_smoke(self):
-    for error_class, args in self.ERRORS:
-      with self.assertRaises(error_class) as e:
-        raise error_class(*args)
-      str(e.exception)