docs(samples): Added LRO code snippet (#220)

* docs(samples): Added LRO code snippet

* lint fix

* converted export_agent response to string in test

* Update samples/snippets/long_running_operation.py

Co-authored-by: Dan Lee <71398022+dandhlee@users.noreply.github.com>

* changed name of function

Co-authored-by: Dan Lee <71398022+dandhlee@users.noreply.github.com>

Dialogflow-CX/long_running_operation.py

@@ -0,0 +1,39 @@
+# Copyright 2021 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
+#
+#      http://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.
+
+
+""" DialogFlow CX long running operation code snippet """
+
+## [START dialogflow_cx_long_running_snippet]
+from google.cloud.dialogflowcx_v3.services.agents.client import AgentsClient
+from google.cloud.dialogflowcx_v3.types.agent import ExportAgentRequest
+
+
+def export_long_running_agent(project_id, agent_id, location):
+
+    api_endpoint = f'{location}-dialogflow.googleapis.com:443'
+    client_options = {"api_endpoint": api_endpoint}
+
+    agents_client = AgentsClient(client_options=client_options)
+
+    export_request = ExportAgentRequest()
+
+    export_request.name = f'projects/{project_id}/locations/{location}/agents/{agent_id}'
+
+    # export_agent returns a long running operation
+    operation = agents_client.export_agent(request=export_request)
+
+    # Returns the result of the operation when the operation is done
+    return operation.result()
+## [END dialogflow_cx_long_running_snippet]

Dialogflow-CX/long_running_operation_test.py

@@ -0,0 +1,66 @@
+# Copyright 2021, 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
+#
+#    http://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.
+
+import os
+import uuid
+
+from google.cloud.dialogflowcx_v3.services.agents.client import AgentsClient
+from google.cloud.dialogflowcx_v3.types.agent import Agent, DeleteAgentRequest
+
+import pytest
+
+from long_running_operation import export_long_running_agent
+
+PROJECT_ID = os.getenv("GOOGLE_CLOUD_PROJECT")
+pytest.AGENT_ID = None
+pytest.PARENT = None
+
+
+def create_agent(project_id, display_name):
+    parent = "projects/" + project_id + "/locations/global"
+
+    agents_client = AgentsClient()
+
+    agent = Agent(
+        display_name=display_name,
+        default_language_code="en",
+        time_zone="America/Los_Angeles",
+    )
+
+    response = agents_client.create_agent(request={"agent": agent, "parent": parent})
+
+    return response
+
+
+def delete_agent(name):
+    agents_client = AgentsClient()
+    agent = DeleteAgentRequest(name=name)
+    agents_client.delete_agent(request=agent)
+
+
+@pytest.fixture(scope="function", autouse=True)
+def setup_teardown():
+    agentName = "temp_agent_" + str(uuid.uuid4())
+    pytest.PARENT = create_agent(PROJECT_ID, agentName).name
+    pytest.AGENT_ID = pytest.PARENT.split("/")[5]
+    print("Created Agent in setUp")
+
+    yield
+
+    delete_agent(pytest.PARENT)
+
+
+def test_export_agent():
+    actualResponse = export_long_running_agent(PROJECT_ID, pytest.AGENT_ID, "global")
+
+    assert pytest.AGENT_ID in str(actualResponse)