Docker-based integration tests
Project description
Description
Simple py.test fixtures for writing integration tests based on Docker containers. Specify all containers you need and pytest-docker will use Docker Compose to spin them up for the duration of your test suite.
Usage
Here is the basic recipe for writing a test that depends on a service that responds over HTTP:
import pytest
import requests
from requests.exceptions import (
ConnectionError,
)
def is_responsive(url):
"""Check if something responds to ``url``."""
try:
response = requests.get(url)
if response.status_code == 200:
return True
except ConnectionError:
return False
@pytest.fixture(scope='session')
def some_http_service(docker_ip, docker_services):
"""Ensure that "some service" is up and responsive."""
url = 'http://' % (
docker_ip,
docker_services.port_for('abc', 123),
)
docker_services.wait_until_responsive(
timeout=30.0, pause=0.1,
check=lambda: is_responsive(url)
)
return url
def test_something(some_service):
"""Sample test."""
response = requests.get(some_service)
response.raise_for_status()
By default this plugin will try to open docker-compose.yml in your tests directory. If you need to use a custom location, override the docker_compose_file fixture inside your conftest.py file:
import pytest
@pytest.fixture(scope='session')
def docker_compose_file(pytestconfig):
return os.path.join(
str(pytestconfig.rootdir),
'mycustomdir'
'docker-compose.yml'
)
You can allow this plugin to run your tests when Docker is not available. It will use the container port and localhost instead:
@pytest.fixture(scope='session')
def docker_allow_fallback():
return True
Changelog
Version 0.3.0
Added --build option to docker-compose up command to automatically rebuild local containers.
Contributing
This py.test plug-in and its source code are made available to your under and MIT license. It is safe to use in commercial and closed-source applications. Read the license for details!
Found a bug? Think a new feature would make this plug-in more practical? No one is paid to support this software, but we welcome pull requests!
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