Make test_net_info a bit more robust.

infra_libs/ts_mon/common/metrics.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.
 
 """Classes representing individual metrics that can be sent."""
 
 import copy
 
 from infra_libs.ts_mon.protos import metrics_pb2
 
@@ skipping 167 matching lines @@
 
   def get(self, fields=None, target_fields=None):
     """Returns the current value for this metric.
 
     Subclasses should never use this to get a value, modify it and set it again.
     Instead use _incr with a modify_fn.
     """
     return interface.state.store.get(
         self.name, self._normalize_fields(fields), target_fields)
 
+  def get_all(self):
+    return interface.state.store.iter_field_values(self.name)
+
   def reset(self):
     """Clears the values of this metric.  Useful in unit tests.
 
     It might be easier to call ts_mon.reset_for_unittest() in your setUp()
     method instead of resetting every individual metric.
     """
 
     interface.state.store.reset_for_unittest(self.name)
 
   def _set(self, fields, target_fields, value, enforce_ge=False):
@@ skipping 253 matching lines @@
                description=None):
     super(NonCumulativeDistributionMetric, self).__init__(
         name,
         is_cumulative=False,
         bucketer=bucketer,
         fields=fields,
         description=description)
 
   def is_cumulative(self):
     return False