sample_pubsub_test_integration.py

# 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]