Python test to "test" the docker image runs

10 hours ago 1

ARTICLE AD BOX

I would like to create a test that basically creates a docker image of my project, and test that the web server is up and running. This is what I got so far:

import pytest import requests import subprocess import time from testcontainers.core.container import DockerContainer from testcontainers.core.wait_strategies import LogMessageWaitStrategy port = 8000 @pytest.fixture(scope="module") def app_container(): # Build the docker image subprocess.run(["docker", "build", "-t", "my-app:test", "."], check=True) # Start the container container = DockerContainer("my-app:test") container.with_exposed_ports(port) container.with_env("PORT", str(port)) container.with_env("DATABASE_CONNECTION_STRING", "sqlite:///:memory:") container.with_env("ENVIRONMENT", "test") container.waiting_for(LogMessageWaitStrategy("Uvicorn running on")) container.start() yield container container.stop() @pytest.mark.timeout(20) def test_actuators_info(app_container): host: str = app_container.get_container_host_ip() container_port: int = app_container.get_exposed_port(port) base_url = f"http://{host}:{container_port}" # Retry logic in case the app takes a moment to be fully responsive max_retries = 5 for _ in range(max_retries): try: response = requests.get(f"{base_url}/actuators/info") if response.status_code == 200: assert response.json() is not None return except requests.exceptions.ConnectionError: pass time.sleep(0.5) pytest.fail("Could not connect to the application or received non-200 status")

This test locally works (almost always, in very few occasions it fails), but it does not work when ran in my GitHub actions.

Is this the best way to test that the docker image is still functional? any other alternatives? any idea why it fails in my GitHub actions?

Thanks!