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Run, manage and stop Docker Compose project from Docker API

Project description


pytest-dockerc is a plugin for pytest that provides support for running test from Docker Compose project. The docker-compose up -d command is executed at the beginning of the test session and the docker-compose down command at the end. The main fixture dockerc returns a compose.project.Project to deal with the python docker API in your tests. Another fixture dockerc_logs is provided to enable the logs on stdout during your tests execution.


pip install pytest-dockerc

Getting started

Below a basic example, you can also refer to a full example with an http server.


├── docker-compose.yml
└── tests


version: "3.6"

    image: python:3-alpine

def test_example(dockerc):
    assert len(dockerc.containers()) == 1
    container = dockerc.containers()[0]
    assert container.is_running is True
    assert container.labels["com.docker.compose.service"] == "python"

Available options

Some options are available with the behavior of the plugin.

  --dockerc-norun       disable the run and stop commands of docker-compose
                        attach the pytest container to the docker-compose
                        network, only if pytest is started inside a container
                        set the Compose file path
                        set the working directory of the Compose project
  --dockerc-build       build images before starting containers
                        select services to run

Run tests without up and down command of docker-compose

Running the full docker-compose project can take time, if you loads several services. It is useful to run the test on a running instance. That method is recommended when you write a new test.

First start your docker compose like usual:

docker-compose up

Then run your tests with the --dockerc-norun, that will skip the up and down command:

pytest --dockerc-norun

Below the docker-compose output after 2 runs of the test tests/test_fixtures::test_basic_workflow, which performs a GET request.

Creating network "pytest-dockerc_default" with the default driver
Creating pytest-dockerc_http_1 ... done
Attaching to pytest-dockerc_http_1
http_1  | - - [24/Dec/2018:08:48:21 +0000] "GET / HTTP/1.1" 200 612 "-" "python-requests/2.20.0" "-"
http_1  | - - [24/Dec/2018:08:48:22 +0000] "GET / HTTP/1.1" 200 612 "-" "python-requests/2.20.0" "-"

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