text: # Copyright 2018 Google LLC
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  """Unit tests."""
  
  import pytest
  
  from google.cloud import logging_v2
  from google.cloud.logging_v2.proto import logging_metrics_pb2
  from google.protobuf import empty_pb2
  
  
  class MultiCallableStub(object):
      """Stub for the grpc.UnaryUnaryMultiCallable interface."""
  
      def __init__(self, method, channel_stub):
          self.method = method
          self.channel_stub = channel_stub
  
      def __call__(self, request, timeout=None, metadata=None, credentials=None):
          self.channel_stub.requests.append((self.method, request))
  
          response = None
          if self.channel_stub.responses:
              response = self.channel_stub.responses.pop()
  
          if isinstance(response, Exception):
              raise response
  
          if response:
              return response
  
  
  class ChannelStub(object):
      """Stub for the grpc.Channel interface."""
  
      def __init__(self, responses=[]):
          self.responses = responses
          self.requests = []
  
      def unary_unary(self,
                      method,
                      request_serializer=None,
                      response_deserializer=None):
          return MultiCallableStub(method, self)
  
  
  class CustomException(Exception):
      pass
  
  
  class TestMetricsServiceV2Client(object):
      def test_list_log_metrics(self):
          # Setup Expected Response
          next_page_token = ''
          metrics_element = {}
          metrics = [metrics_element]
          expected_response = {
              'next_page_token': next_page_token,
              'metrics': metrics
          }
          expected_response = logging_metrics_pb2.ListLogMetricsResponse(
              **expected_response)
  
          # Mock the API response
          channel = ChannelStub(responses=[expected_response])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup Request
          parent = client.project_path('[PROJECT]')
  
          paged_list_response = client.list_log_metrics(parent)
          resources = list(paged_list_response)
          assert len(resources) == 1
  
          assert expected_response.metrics[0] == resources[0]
  
          assert len(channel.requests) == 1
          expected_request = logging_metrics_pb2.ListLogMetricsRequest(
              parent=parent)
          actual_request = channel.requests[0][1]
          assert expected_request == actual_request
  
      def test_list_log_metrics_exception(self):
          channel = ChannelStub(responses=[CustomException()])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup request
          parent = client.project_path('[PROJECT]')
  
          paged_list_response = client.list_log_metrics(parent)
          with pytest.raises(CustomException):
              list(paged_list_response)
  
      def test_get_log_metric(self):
          # Setup Expected Response
          name = 'name3373707'
          description = 'description-1724546052'
          filter_ = 'filter-1274492040'
          value_extractor = 'valueExtractor2047672534'
          expected_response = {
              'name': name,
              'description': description,
              'filter': filter_,
              'value_extractor': value_extractor
          }
          expected_response = logging_metrics_pb2.LogMetric(**expected_response)
  
          # Mock the API response
          channel = ChannelStub(responses=[expected_response])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup Request
          metric_name = client.metric_path('[PROJECT]', '[METRIC]')
  
          response = client.get_log_metric(metric_name)
          assert expected_response == response
  
          assert len(channel.requests) == 1
          expected_request = logging_metrics_pb2.GetLogMetricRequest(
              metric_name=metric_name)
          actual_request = channel.requests[0][1]
          assert expected_request == actual_request
  
      def test_get_log_metric_exception(self):
          # Mock the API response
          channel = ChannelStub(responses=[CustomException()])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup request
          metric_name = client.metric_path('[PROJECT]', '[METRIC]')
  
          with pytest.raises(CustomException):
              client.get_log_metric(metric_name)
  
      def test_create_log_metric(self):
          # Setup Expected Response
          name = 'name3373707'
          description = 'description-1724546052'
          filter_ = 'filter-1274492040'
          value_extractor = 'valueExtractor2047672534'
          expected_response = {
              'name': name,
              'description': description,
              'filter': filter_,
              'value_extractor': value_extractor
          }
          expected_response = logging_metrics_pb2.LogMetric(**expected_response)
  
          # Mock the API response
          channel = ChannelStub(responses=[expected_response])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup Request
          parent = client.project_path('[PROJECT]')
          metric = {}
  
          response = client.create_log_metric(parent, metric)
          assert expected_response == response
  
          assert len(channel.requests) == 1
          expected_request = logging_metrics_pb2.CreateLogMetricRequest(
              parent=parent, metric=metric)
          actual_request = channel.requests[0][1]
          assert expected_request == actual_request
  
      def test_create_log_metric_exception(self):
          # Mock the API response
          channel = ChannelStub(responses=[CustomException()])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup request
          parent = client.project_path('[PROJECT]')
          metric = {}
  
          with pytest.raises(CustomException):
              client.create_log_metric(parent, metric)
  
      def test_update_log_metric(self):
          # Setup Expected Response
          name = 'name3373707'
          description = 'description-1724546052'
          filter_ = 'filter-1274492040'
          value_extractor = 'valueExtractor2047672534'
          expected_response = {
              'name': name,
              'description': description,
              'filter': filter_,
              'value_extractor': value_extractor
          }
          expected_response = logging_metrics_pb2.LogMetric(**expected_response)
  
          # Mock the API response
          channel = ChannelStub(responses=[expected_response])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup Request
          metric_name = client.metric_path('[PROJECT]', '[METRIC]')
          metric = {}
  
          response = client.update_log_metric(metric_name, metric)
          assert expected_response == response
  
          assert len(channel.requests) == 1
          expected_request = logging_metrics_pb2.UpdateLogMetricRequest(
              metric_name=metric_name, metric=metric)
          actual_request = channel.requests[0][1]
          assert expected_request == actual_request
  
      def test_update_log_metric_exception(self):
          # Mock the API response
          channel = ChannelStub(responses=[CustomException()])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup request
          metric_name = client.metric_path('[PROJECT]', '[METRIC]')
          metric = {}
  
          with pytest.raises(CustomException):
              client.update_log_metric(metric_name, metric)
  
      def test_delete_log_metric(self):
          channel = ChannelStub()
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup Request
          metric_name = client.metric_path('[PROJECT]', '[METRIC]')
  
          client.delete_log_metric(metric_name)
  
          assert len(channel.requests) == 1
          expected_request = logging_metrics_pb2.DeleteLogMetricRequest(
              metric_name=metric_name)
          actual_request = channel.requests[0][1]
          assert expected_request == actual_request
  
      def test_delete_log_metric_exception(self):
          # Mock the API response
          channel = ChannelStub(responses=[CustomException()])
          client = logging_v2.MetricsServiceV2Client(channel=channel)
  
          # Setup request
          metric_name = client.metric_path('[PROJECT]', '[METRIC]')
  
          with pytest.raises(CustomException):
              client.delete_log_metric(metric_name)
  