Add diagrams test

catch-all/07_diagrams_as_code/04_message_gcp.py

@@ -0,0 +1,37 @@
+#! /usr/bin/env python
+
+from diagrams import Cluster, Diagram
+from diagrams.gcp.analytics import BigQuery, Dataflow, PubSub
+from diagrams.gcp.compute import AppEngine, Functions
+from diagrams.gcp.database import BigTable
+from diagrams.gcp.iot import IotCore
+from diagrams.gcp.storage import GCS
+
+with Diagram("Message Collecting", show=False):
+    pubsub = PubSub("pubsub")
+
+    with Cluster("Source of Data"):
+        [
+            IotCore("core1"),
+            IotCore("core2"),
+            IotCore("core3")
+        ] >> pubsub
+
+    with Cluster("Targets"):
+        with Cluster("Data Flow"):
+            flow = Dataflow("data flow")
+
+        with Cluster("Data Lake"):
+            flow >> [
+                BigQuery("bq"),
+                GCS("storage")
+            ]
+
+        with Cluster("Event Driven"):
+            with Cluster("Processing"):
+                flow >> AppEngine("engine") >> BigTable("bigtable")
+
+            with Cluster("Serverless"):
+                flow >> Functions("func") >> AppEngine("appengine")
+
+    pubsub >> flow