Try dockerizing the Windows tests

.circleci/config.yml

@@ -8,6 +8,7 @@ defaults: &defaults
     - run: docker run --volume "$(pwd):/home/user/app" --workdir "/home/user/app/quodlibet" --tty --detach myimage bash > container_id
     - run: docker exec "$(cat container_id)" $PYTHON $PYARGS ./setup.py test
     - run: docker exec "$(cat container_id)" $PYTHON $PYARGS ./setup.py quality
+    - run: docker stop "$(cat container_id)"
 
 version: 2
 jobs:
@@ -35,12 +36,22 @@ jobs:
       - PYTHON: "python3"
       - DOCKER_FILE: ".travis/Dockerfile.ubuntu16.04.py3"
     <<: *defaults
+  job.win32.py2:
+    environment:
+      - PYARGS: "-R"
+      - PYTHON: "python2"
+      - DOCKER_FILE: ".travis/Dockerfile.win32.py2"
+    <<: *defaults
+  job.win32.py3:
+    environment:
+      - PYARGS: "-R"
+      - PYTHON: "python3"
+      - DOCKER_FILE: ".travis/Dockerfile.win32.py3"
+    <<: *defaults
 
 workflows:
   version: 2
   build_and_test:
     jobs:
-      - job.debian8.py2
-      - job.debian8.py3
-      - job.ubuntu16.04.py2
-      - job.ubuntu16.04.py3
+      - job.win32.py2
+      - job.win32.py3

.travis/Dockerfile.win32.py2

@@ -0,0 +1,33 @@
+FROM debian:stretch
+
+ENV LANG C.UTF-8
+ENV PYTHONDONTWRITEBYTECODE 1
+ENV CI true
+
+RUN useradd -ms /bin/bash user
+
+WORKDIR /home/user
+
+RUN dpkg --add-architecture i386
+
+RUN apt-get update
+
+RUN apt-get install --no-install-recommends -y \
+    wine wine32 xvfb xauth \
+    wget ca-certificates \
+    p7zip-full
+
+USER user
+
+RUN wget https://bitbucket.org/lazka/quodlibet/downloads/quodlibet-latest-installer.exe -O win-inst.exe
+
+RUN 7z x -o_win_inst win-inst.exe
+
+ENV WINEPREFIX /home/user/_wineprefix
+ENV WINEDEBUG -all
+
+RUN echo '#!/bin/bash\n(rm -Rf "$WINEPREFIX" && xvfb-run -a wine /home/user/_win_inst/bin/python.exe "$@")' > python2
+
+RUN chmod a+x python2
+
+ENV PATH /home/user:$PATH

.travis/Dockerfile.win32.py3

@@ -0,0 +1,33 @@
+FROM debian:stretch
+
+ENV LANG C.UTF-8
+ENV PYTHONDONTWRITEBYTECODE 1
+ENV CI true
+
+RUN useradd -ms /bin/bash user
+
+WORKDIR /home/user
+
+RUN dpkg --add-architecture i386
+
+RUN apt-get update
+
+RUN apt-get install --no-install-recommends -y \
+    wine wine32 xvfb xauth \
+    wget ca-certificates \
+    p7zip-full
+
+USER user
+
+RUN wget https://bitbucket.org/lazka/quodlibet/downloads/quodlibet-latest-installer-py3.exe -O win-inst.exe
+
+RUN 7z x -o_win_inst win-inst.exe
+
+ENV WINEPREFIX /home/user/_wineprefix
+ENV WINEDEBUG -all
+
+RUN echo '#!/bin/bash\n(rm -Rf "$WINEPREFIX" && xvfb-run -a wine /home/user/_win_inst/bin/python3.exe "$@")' > python3
+
+RUN chmod a+x python3
+
+ENV PATH /home/user:$PATH

quodlibet/tests/__init__.py

@@ -256,6 +256,9 @@ def unit(run=[], suite=None, strict=False, exitfirst=False, network=True,
 
     args = []
 
+    if is_ci():
+        args.extend(["-p", "no:cacheprovider"])
+
     if run:
         args.append("-k")
         args.append(" or ".join(run))