functions: add missing integration test samples (#4324)

* functions: add missing integration test samples

* Fix lint

* Fix lint, take 2

Author: Ace Nassri

functions/helloworld/requirements-test.txt

@@ -1,2 +1,4 @@
+functions-framework==2.0.0
 mock==4.0.2
 pytest==5.4.3
+uuid==1.30

functions/helloworld/sample_http_test_integration.py

@@ -0,0 +1,59 @@
+# Copyright 220 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.
+
+# [START functions_http_integration_test]
+import os
+import subprocess
+import uuid
+
+import requests
+from requests.packages.urllib3.util.retry import Retry
+
+
+def test_args():
+    name = str(uuid.uuid4())
+    port = 8080  # Each functions framework instance needs a unique por
+
+    process = subprocess.Popen(
+      [
+        'functions-framework',
+        '--target', 'hello_http',
+        '--port', str(port)
+      ],
+      cwd=os.path.dirname(__file__),
+      stdout=subprocess.PIPE
+    )
+
+    # Send HTTP request simulating Pub/Sub message
+    # (GCF translates Pub/Sub messages to HTTP requests internally)
+    BASE_URL = os.getenv('BASE_URL')
+
+    retry_policy = Retry(total=6, backoff_factor=1)
+    retry_adapter = requests.adapters.HTTPAdapter(
+      max_retries=retry_policy)
+
+    session = requests.Session()
+    session.mount(BASE_URL, retry_adapter)
+
+    name = str(uuid.uuid4())
+    res = requests.post(
+      BASE_URL,
+      json={'name': name}
+    )
+    assert res.text == 'Hello {}!'.format(name)
+
+    # Stop the functions framework process
+    process.kill()
+    process.wait()
+# [END functions_http_integration_test]

functions/helloworld/sample_pubsub_test_integration.py

@@ -0,0 +1,68 @@
+# Copyright 2020 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.
+
+# [START functions_pubsub_integration_test]
+import base64
+import os
+import subprocess
+import uuid
+
+import requests
+from requests.packages.urllib3.util.retry import Retry
+
+
+def test_print_name():
+    name = str(uuid.uuid4())
+    port = 8088  # Each running framework instance needs a unique port
+
+    encoded_name = base64.b64encode(name.encode('utf-8')).decode('utf-8')
+    pubsub_message = {
+        'data': {'data': encoded_name}
+    }
+
+    process = subprocess.Popen(
+      [
+        'functions-framework',
+        '--target', 'hello_pubsub',
+        '--signature-type', 'event',
+        '--port', str(port)
+      ],
+      cwd=os.path.dirname(__file__),
+      stdout=subprocess.PIPE
+    )
+
+    # Send HTTP request simulating Pub/Sub message
+    # (GCF translates Pub/Sub messages to HTTP requests internally)
+    url = f'http://localhost:{port}/'
+
+    retry_policy = Retry(total=6, backoff_factor=1)
+    retry_adapter = requests.adapters.HTTPAdapter(
+      max_retries=retry_policy)
+
+    session = requests.Session()
+    session.mount(url, retry_adapter)
+
+    response = session.post(url, json=pubsub_message)
+
+    assert response.status_code == 200
+
+    # Stop the functions framework process
+    process.kill()
+    process.wait()
+    out, err = process.communicate()
+
+    print(out, err, response.content)
+
+    assert f'Hello {name}!' in str(out)
+# [END functions_pubsub_integration_test]