tests: Run tests in parallel using pytest-xdist

.travis.yml

@@ -14,4 +14,4 @@ install:
   - pushd $TRAVIS_BUILD_DIR
   - docker-compose build --build-arg TASK_VERSION=$TASK_VERSION tests
 script:
-  - make test
+  - make test PYTEST_FLAGS="-n8"

Dockerfile

@@ -28,7 +28,7 @@ RUN cd /root/.vim/bundle; git clone https://github.com/vimwiki/vimwiki.git
 RUN cd /root/.vim/bundle/vimwiki/; git checkout dev
 
 # Setup taskwiki
-RUN pip3 install nose pytest coveralls coverage vimrunner
+RUN pip3 install nose pytest pytest-xdist coveralls coverage vimrunner
 ADD requirements.txt requirements.txt
 RUN pip3 install -r requirements.txt
 RUN mkdir /root/.vim/bundle/taskwiki

tests/base.py

@@ -10,7 +10,7 @@ import vimrunner
 from tasklib import TaskWarrior, Task
 from time import sleep
 
-server_name = "TaskWikiTestServer"
+server_name = "TaskWikiTestServer-{}".format(os.getpid())
 server = vimrunner.Server(name=server_name)