Tips for contributors to run the webkit backend

doc/contributing.asciidoc

@@ -192,6 +192,28 @@ specific one you can set either of a) the environment variable QUTE_TESTS_BACKEN
 , or b) the command line argument --qute-backend, to the desired backend
 (webkit/webengine).
 
+If you need an environment with webkit installed to do testing while we still
+support it (see #4039) you can re-use the docker container used for the CI
+test runs which has PyQt5Webkit installed from the archlinux package archives.
+Examples:
+
+----
+# Get a bash shell in the docker container with
+# a) the current directory mounted at /work in the container
+# b) the container using the X11 display :27 (for example, a Xephyr instance) from the host
+# c) the tox and hypothesis dirs set to somewhere in the container that it can write to
+# d) the system site packages available in the tox venv so you can use PyQt
+#    from the OS without having to run the link_pyqt script
+docker run -it -v $PWD:/work:ro -w /work -e QUTE_TESTS_BACKEND=webkit -e DISPLAY=:27 -v /tmp/.X11-unix:/tmp/.X11-unix -e TOX_WORK_DIR="/home/user/.tox" -e HYPOTHESIS_EXAMPLES_DIR="/home/user/.hypothesis/examples" -e VIRTUALENV_SYSTEM_SITE_PACKAGES=True qutebrowser/ci:archlinux-webkit bash
+
+# Start a qutebrowser temporary basedir in the appropriate tox environment to
+# play with
+tox exec -e py-qt5 -- python3 -m qutebrowser -T --backend webkit
+
+# Run tests, passing positional args through to pytest.
+tox -e py-qt5 -- tests/unit
+----
+
 Profiling
 ~~~~~~~~~
 

tests/conftest.py

@@ -11,6 +11,7 @@
 
 import pytest
 import hypothesis
+import hypothesis.database
 
 pytest.register_assert_rewrite('helpers')
 
@@ -33,10 +34,19 @@
 
 
 # Set hypothesis settings
+hypotheses_optional_kwargs = {}
+if "HYPOTHESIS_EXAMPLES_DIR" in os.environ:
+    hypotheses_optional_kwargs[
+        "database"
+    ] = hypothesis.database.DirectoryBasedExampleDatabase(
+        os.environ["HYPOTHESIS_EXAMPLES_DIR"]
+    )
+
 hypothesis.settings.register_profile(
     'default', hypothesis.settings(
         deadline=600,
         suppress_health_check=[hypothesis.HealthCheck.function_scoped_fixture],
+        **hypotheses_optional_kwargs,
     )
 )
 hypothesis.settings.register_profile(
@@ -45,7 +55,8 @@
         suppress_health_check=[
             hypothesis.HealthCheck.function_scoped_fixture,
             hypothesis.HealthCheck.too_slow
-        ]
+        ],
+        **hypotheses_optional_kwargs,
     )
 )
 hypothesis.settings.load_profile('ci' if testutils.ON_CI else 'default')

tox.ini

@@ -8,6 +8,7 @@ envlist = py38-pyqt515-cov,mypy-pyqt5,misc,vulture,flake8,pylint,pyroma,check-ma
 distshare = {toxworkdir}
 skipsdist = true
 minversion = 3.20
+toxworkdir={env:TOX_WORK_DIR:{toxinidir}/.tox}
 
 [testenv]
 setenv =
@@ -30,6 +31,7 @@ passenv =
     QT_QUICK_BACKEND
     FORCE_COLOR
     DBUS_SESSION_BUS_ADDRESS
+    HYPOTHESIS_EXAMPLES_DIR
 basepython =
     py: {env:PYTHON:python3}
     py3: {env:PYTHON:python3}