Add delete_topic and delete_subscription

Author: remi Taylor

pubsub/sample.rb

@@ -30,6 +30,18 @@ def create_topic
   # [END create_topic]
 end
 
+def delete_topic
+  # [START delete_topic]
+  gcloud = Google::Cloud.new "my-gcp-project-id"
+  pubsub = gcloud.pubsub
+  topic  = pubsub.topic "my-topic"
+
+  topic.delete
+
+  puts "Deleted topic my-topic"
+  # [END delete_topic]
+end
+
 def create_subscription
   # [START create_subscription]
   gcloud = Google::Cloud.new "my-gcp-project-id"
@@ -42,6 +54,19 @@ def create_subscription
   # [END create_subscription]
 end
 
+def delete_subscription
+  # [START delete_subscription]
+  gcloud       = Google::Cloud.new "my-gcp-project-id"
+  pubsub       = gcloud.pubsub
+  topic        = pubsub.topic "my-topic"
+  subscription = topic.subscription "my-subscription"
+
+  subscription.delete
+
+  puts "Deleted subscription my-subscription"
+  # [END delete_subscription]
+end
+
 def create_push_subscription
   # [START create_push_subscription]
   gcloud = Google::Cloud.new "my-gcp-project-id"

pubsub/spec/sample_spec.rb

@@ -61,6 +61,15 @@ def expect_with_retry attempts: 5
     expect(topic.name).to include(TOPIC_NAME)
   end
 
+  it "deletes topic" do
+    @pubsub.create_topic TOPIC_NAME
+    expect(@pubsub.topic TOPIC_NAME).not_to be nil
+
+    expect { delete_topic }.to output("Deleted topic #{TOPIC_NAME}\n").to_stdout
+
+    expect(@pubsub.topic TOPIC_NAME).to be nil
+  end
+
   it "creates subscription" do
     expect(@pubsub.subscription(SUBSCRIPTION_NAME)).to be nil
     @pubsub.create_topic TOPIC_NAME
@@ -74,6 +83,22 @@ def expect_with_retry attempts: 5
     expect(subscription.topic.name).to include(TOPIC_NAME)
   end
 
+  it "deletes subscription" do
+    topic = @pubsub.create_topic TOPIC_NAME
+    @pubsub.create_subscription(
+      TOPIC_NAME,
+      SUBSCRIPTION_NAME,
+      autocreate: true
+    )
+    expect(topic.subscription SUBSCRIPTION_NAME).not_to be nil
+
+    expect { delete_subscription }.to output(
+      "Deleted subscription #{SUBSCRIPTION_NAME}\n"
+    ).to_stdout
+
+    expect(topic.subscription SUBSCRIPTION_NAME).to be nil
+  end
+
   it "creates push subscription" do
     subscription_name = "my-subscription-push"