GCF: Add Firebase remote config sample (GoogleCloudPlatform#1860)

* Add Firebase remote config sample

Change-Id: Ic894bdda8f749a3308dd63476bab3e3f64f89be4

* Fix docstring

Change-Id: Id5f20206cd45b14f22caa585a5aa10cdf71b93d1

Author: Ace Nassri

functions/firebase/main.py

@@ -103,8 +103,6 @@ def make_upper_case(data, context):
 
 # [START functions_firebase_analytics]
 def hello_analytics(data, context):
-    print(data)
-    print(context)
     """ Triggered by a Google Analytics for Firebase log event.
      Args:
             data (dict): The event payload.
@@ -125,3 +123,16 @@ def hello_analytics(data, context):
     geo_info = user_obj["geoInfo"]
     print(f'Location: {geo_info["city"]}, {geo_info["country"]}')
 # [END functions_firebase_analytics]
+
+
+# [START functions_firebase_remote_config]
+def hello_remote_config(data, context):
+    """ Triggered by a change to a Firebase Remote Config value.
+     Args:
+            data (dict): The event payload.
+            context (google.cloud.functions.Context): Metadata for the event.
+    """
+    print(f'Update type: {data["updateType"]}')
+    print(f'Origin: {data["updateOrigin"]}')
+    print(f'Version: {data["versionNumber"]}')
+# [END functions_firebase_remote_config]

functions/firebase/main_test.py

@@ -148,3 +148,20 @@ def test_analytics(capsys):
     assert 'Name: my-event' in out
     assert 'Device Model: Pixel' in out
     assert 'Location: London, UK' in out
+
+
+def test_remote_config(capsys):
+    data = {
+        'updateOrigin': 'CONSOLE',
+        'updateType': 'INCREMENTAL_UPDATE',
+        'versionNumber': '1'
+    }
+    context = Context()
+
+    main.hello_remote_config(data, context)
+
+    out, _ = capsys.readouterr()
+
+    assert 'Update type: INCREMENTAL_UPDATE' in out
+    assert 'Origin: CONSOLE' in out
+    assert 'Version: 1' in out