Add test for timing in meta

Also found a bug in the timing code that was exposed by random hash
seeding.

os_performance_tools/counters2statsd.py

@@ -101,6 +101,7 @@ class AttachmentResult(testtools.StreamResult):
                     if 'delta_seconds' in values:
                         client.timing(
                             'testrun', values['delta_seconds'] * 1000)
+                    continue
                 for k, v in values.items():
                     k = '{}.{}'.format(groupname, k)
                     try:

os_performance_tools/tests/test_counters2statsd.py

@@ -21,12 +21,13 @@ Tests for `os_performance_tools.counters2statsd`
 
 import json
 import mock
+import time
 
 from os_performance_tools import counters2statsd
 from os_performance_tools.tests import base
 
 
-class TestOpenStackQaTols(base.TestCase):
+class TestCounters2Statsd(base.TestCase):
 
     @mock.patch('statsd.StatsClient')
     def test_add_test_run_attachments(self, statsd_mock):
@@ -46,3 +47,32 @@ class TestOpenStackQaTols(base.TestCase):
         statsd_mock.assert_called_with('localhost', 8125, None)
         mock_pipeline.incr.assert_called_with('mysql.Queries', 10)
         mock_pipeline.send.assert_called_with()
+
+    @mock.patch('statsd.StatsClient')
+    def test_add_test_run_attachments_meta(self, statsd_mock):
+        mock_client = mock.MagicMock('statsd_client')
+        statsd_mock.return_value = mock_client
+        mock_client.pipeline = mock.MagicMock('statsd_pipeline')
+        mock_pipeline = mock.MagicMock('Pipeline')
+        mock_pipeline.incr = mock.MagicMock('statds_incr')
+        mock_pipeline.timing = mock.MagicMock('statds_timing')
+        mock_pipeline.send = mock.MagicMock('statds_send')
+        mock_client.pipeline.return_value = mock_pipeline
+        fake_counters = {
+            '__meta__': {
+                'unixtime': time.time(),
+                'delta_seconds': 10.5,
+            },
+            'mysql': {
+                'Queries': 50
+            }
+        }
+        fake_counters = json.dumps(fake_counters).encode('utf-8')
+        self.assertTrue(counters2statsd.AttachmentResult.enabled())
+        result = counters2statsd.AttachmentResult()
+        result.status(file_name='counters.json', file_bytes=fake_counters)
+        result.stopTestRun()
+        statsd_mock.assert_called_with('localhost', 8125, None)
+        mock_pipeline.timing.assert_called_with('testrun', 10500)
+        mock_pipeline.incr.assert_called_with('mysql.Queries', 50)
+        mock_pipeline.send.assert_called_with()