chore: remove gcp-devrel-py-tools from iot and pubsub [(#3470)](GoogleCloudPlatform/python-docs-samples#3470)

* [iot] chore: remove unused dependency

* [pubsub] chore: remove gcp-devrel-py-tools

Author: Takashi Matsuo

packages/google-cloud-pubsub/samples/snippets/publisher_test.py

@@ -16,7 +16,7 @@
 import time
 import uuid
 
-from gcp_devrel.testing import eventually_consistent
+import backoff
 from google.cloud import pubsub_v1
 import mock
 import pytest
@@ -75,12 +75,14 @@ def new_sleep(period):
 
 
 def test_list(client, topic_admin, capsys):
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         publisher.list_topics(PROJECT)
         out, _ = capsys.readouterr()
         assert topic_admin in out
 
+    eventually_consistent_test()
+
 
 def test_create(client):
     topic_path = client.topic_path(PROJECT, TOPIC_ADMIN)
@@ -91,19 +93,23 @@ def test_create(client):
 
     publisher.create_topic(PROJECT, TOPIC_ADMIN)
 
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         assert client.get_topic(topic_path)
 
+    eventually_consistent_test()
+
 
 def test_delete(client, topic_admin):
     publisher.delete_topic(PROJECT, TOPIC_ADMIN)
 
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         with pytest.raises(Exception):
             client.get_topic(client.topic_path(PROJECT, TOPIC_ADMIN))
 
+    eventually_consistent_test()
+
 
 def test_publish(topic_publish, capsys):
     publisher.publish_messages(PROJECT, TOPIC_PUBLISH)

packages/google-cloud-pubsub/samples/snippets/requirements-test.txt

@@ -1,4 +1,3 @@
+backoff==1.10.0
 pytest==5.3.2
-gcp-devrel-py-tools==0.0.15
 mock==3.0.5
-google-cloud-core==1.3.0

packages/google-cloud-pubsub/samples/snippets/subscriber_test.py

@@ -15,7 +15,7 @@
 import os
 import uuid
 
-from gcp_devrel.testing import eventually_consistent
+import backoff
 from google.cloud import pubsub_v1
 import pytest
 
@@ -110,20 +110,24 @@ def subscription_async(subscriber_client, topic):
 
 
 def test_list_in_topic(subscription_admin, capsys):
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         subscriber.list_subscriptions_in_topic(PROJECT, TOPIC)
         out, _ = capsys.readouterr()
         assert subscription_admin in out
 
+    eventually_consistent_test()
+
 
 def test_list_in_project(subscription_admin, capsys):
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         subscriber.list_subscriptions_in_project(PROJECT)
         out, _ = capsys.readouterr()
         assert subscription_admin in out
 
+    eventually_consistent_test()
+
 
 def test_create(subscriber_client):
     subscription_path = subscriber_client.subscription_path(
@@ -137,10 +141,12 @@ def test_create(subscriber_client):
 
     subscriber.create_subscription(PROJECT, TOPIC, SUBSCRIPTION_ADMIN)
 
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         assert subscriber_client.get_subscription(subscription_path)
 
+    eventually_consistent_test()
+
 
 def test_create_push(subscriber_client):
     subscription_path = subscriber_client.subscription_path(
@@ -155,10 +161,12 @@ def test_create_push(subscriber_client):
         PROJECT, TOPIC, SUBSCRIPTION_ADMIN, ENDPOINT
     )
 
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         assert subscriber_client.get_subscription(subscription_path)
 
+    eventually_consistent_test()
+
 
 def test_update(subscriber_client, subscription_admin, capsys):
     subscriber.update_subscription(PROJECT, SUBSCRIPTION_ADMIN, NEW_ENDPOINT)
@@ -170,11 +178,13 @@ def test_update(subscriber_client, subscription_admin, capsys):
 def test_delete(subscriber_client, subscription_admin):
     subscriber.delete_subscription(PROJECT, SUBSCRIPTION_ADMIN)
 
-    @eventually_consistent.call
-    def _():
+    @backoff.on_exception(backoff.expo, AssertionError, max_time=60)
+    def eventually_consistent_test():
         with pytest.raises(Exception):
             subscriber_client.get_subscription(subscription_admin)
 
+    eventually_consistent_test()
+
 
 def _publish_messages(publisher_client, topic):
     for n in range(5):