Comparing datetime.datetime-s in trace unit tests. (#4323)

Doing this because on Windows, when parsed into a protobuf
and converted back to a string, trailing zeros are truncated.

See: https://ci.appveyor.com/project/GoogleCloudPlatform/google-cloud-python/build/1.0.2506.master/job/xl4wk678mibxw0wa

trace/tests/unit/test__gax.py

@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import datetime
 import unittest
 
 import mock
@@ -46,13 +47,11 @@ def test_patch_traces(self):
  from google.cloud.trace._gax import _traces_mapping_to_pb
  from google.cloud._helpers import _datetime_to_pb_timestamp
 
- from datetime import datetime
-
  trace_id = 'test_trace_id'
  span_id = 1234
  span_name = 'test_span_name'
- start_time = datetime.utcnow()
- end_time = datetime.utcnow()
+ start_time = datetime.datetime.utcnow()
+ end_time = datetime.datetime.utcnow()
 
  traces = {
  'traces': [
@@ -157,20 +156,20 @@ def _make_trace_pb(
  return trace_pb
 
  def test_list_traces_no_paging(self):
+ from google.cloud._helpers import _rfc3339_to_datetime
+ from google.cloud._helpers import UTC
  from google.cloud._testing import _GAXPageIterator
  from google.cloud.gapic.trace.v1 import trace_service_client
  from google.cloud.gapic.trace.v1.enums import ListTracesRequest as Enum
  from google.gax import INITIAL_PAGE
 
- from datetime import datetime
-
  trace_id = 'test_trace_id'
  span_id = 1234
  span_name = 'test_span_name'
  span_kind = 'RPC_CLIENT'
  parent_span_id = 123
- start_time = datetime.utcnow().isoformat() + 'Z'
- end_time = datetime.utcnow().isoformat() + 'Z'
+ start_ts = datetime.datetime.utcnow()
+ end_ts = datetime.datetime.utcnow()
  labels = {
  '/http/status_code': '200',
  '/component': 'HTTP load balancer',
@@ -183,8 +182,8 @@ def test_list_traces_no_paging(self):
  trace_id,
  span_id,
  span_name,
- start_time,
- end_time,
+ start_ts.isoformat() + 'Z',
+ end_ts.isoformat() + 'Z',
  parent_span_id,
  labels)
 
@@ -213,9 +212,11 @@ def test_list_traces_no_paging(self):
  self.assertEqual(span['name'], span_name)
 
  self.assertEqual(
- span['startTime'], start_time)
+ _rfc3339_to_datetime(span['startTime']),
+ start_ts.replace(tzinfo=UTC))
  self.assertEqual(
- span['endTime'], end_time)
+ _rfc3339_to_datetime(span['endTime']),
+ end_ts.replace(tzinfo=UTC))
  self.assertEqual(span['kind'], span_kind)
  self.assertEqual(span['parentSpanId'], str(parent_span_id))
  self.assertEqual(span['labels'], labels)
@@ -232,19 +233,19 @@ def test_list_traces_no_paging(self):
  self.assertEqual(call_args['options'].page_token, INITIAL_PAGE)
 
  def test_list_traces_with_paging(self):
+ from google.cloud._helpers import _rfc3339_to_datetime
+ from google.cloud._helpers import UTC
  from google.cloud._testing import _GAXPageIterator
  from google.cloud.gapic.trace.v1 import trace_service_client
  from google.cloud.gapic.trace.v1.enums import ListTracesRequest as Enum
 
- from datetime import datetime
-
  trace_id = 'test_trace_id'
  span_id = 1234
  span_name = 'test_span_name'
  span_kind = 'RPC_CLIENT'
  parent_span_id = 123
- start_time = datetime.utcnow().isoformat() + 'Z'
- end_time = datetime.utcnow().isoformat() + 'Z'
+ start_ts = datetime.datetime.utcnow()
+ end_ts = datetime.datetime.utcnow()
  labels = {
  '/http/status_code': '200',
  '/component': 'HTTP load balancer',
@@ -258,8 +259,8 @@ def test_list_traces_with_paging(self):
  trace_id,
  span_id,
  span_name,
- start_time,
- end_time,
+ start_ts.isoformat() + 'Z',
+ end_ts.isoformat() + 'Z',
  parent_span_id,
  labels)
 
@@ -289,9 +290,11 @@ def test_list_traces_with_paging(self):
  self.assertEqual(span['name'], span_name)
 
  self.assertEqual(
- span['startTime'], start_time)
+ _rfc3339_to_datetime(span['startTime']),
+ start_ts.replace(tzinfo=UTC))
  self.assertEqual(
- span['endTime'], end_time)
+ _rfc3339_to_datetime(span['endTime']),
+ end_ts.replace(tzinfo=UTC))
  self.assertEqual(span['kind'], span_kind)
  self.assertEqual(span['parentSpanId'], str(parent_span_id))
  self.assertEqual(span['labels'], labels)