Merge pull request pytest-docker-compose#25 from RmStorm/develop

Added option to remove volumes after running tests this closes pytest-docker-compose#23

Author: RmStorm

README.rst

@@ -181,6 +181,16 @@ working directory.  You can specify a different file via the
     See `Configuration Options`_ for more information on using configuration
     files to modify pytest behavior.
 
+Remove volumes after tests
+--------------------------
+There is another configuration option that will delete the volumes of containers after running.
+
+.. code-block:: sh
+
+    pytest --docker-compose-remove-volumes
+
+This option will be ignored if the plugin is not used. Again, this option can also be added to the pytest.ini file.
+
 For more examples on how to use this plugin look at the testing suite of this plugin itself! It will give you some examples for configuring pytest.ini and how to use the different fixtures to run docker containers.
 
 .. _Configuration Options: https://docs.pytest.org/en/latest/customize.html#adding-default-options

src/pytest_docker_compose/__init__.py

@@ -78,6 +78,9 @@ def pytest_addoption(parser):
             help="Path to docker-compose.yml file, or directory containing same.",
         )
 
+        group.addoption("--docker-compose-remove-volumes", action="store_true",
+                        default=False, help="Remove docker container volumes after tests")
+
         group.addoption("--docker-compose-no-build", action="store_true",
                         default=False, help="Boolean to not build docker containers")
 
@@ -173,7 +176,8 @@ def scoped_containers_fixture(docker_project: Project, request):
                       or "(no logs)", '\n')
 
             if not request.config.getoption("--use-running-containers"):
-                docker_project.down(ImageType.none, False)
+                docker_project.down(ImageType.none, request.config.getoption("--docker-compose-remove-volumes"))
+
         scoped_containers_fixture.__wrapped__.__doc__ = """
             Spins up the containers for the Docker project and returns an
             object that can retrieve the containers. The returned containers