try running tests with xvfb on linux

Author: minrk

.github/workflows/ci.yml

@@ -53,6 +53,11 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: setup xvfb
+        if: ${{ startsWith(matrix.runs-on, 'ubuntu) }}
+        run: |
+          echo "PRE_TEST=xvfb-run --auto-servernum" >> "$GITHUB_ENV"
+
       - name: set qt env
         run: |
           echo "QT=${{ matrix.qt }}" >> $GITHUB_ENV
@@ -67,19 +72,19 @@ jobs:
         timeout-minutes: 15
         if: ${{ !startsWith( matrix.python-version, 'pypy' ) && !startsWith(matrix.os, 'windows') }}
         run: |
-          hatch run cov:test --cov-fail-under 50
+          ${PRE_TEST-} hatch run cov:test --cov-fail-under 50
 
       - name: Run the tests on pypy
         timeout-minutes: 15
         if: ${{ startsWith( matrix.python-version, 'pypy' ) }}
         run: |
-          hatch run test:nowarn --ignore=tests/test_debugger.py
+          ${PRE_TEST-} hatch run test:nowarn --ignore=tests/test_debugger.py
 
       - name: Run the tests on Windows
         timeout-minutes: 15
         if: ${{ !startsWith( matrix.python-version, 'pypy' ) && startsWith(matrix.os, 'windows') }}
         run: |
-          hatch run cov:nowarn
+          ${PRE_TEST-} hatch run cov:nowarn
 
       - name: Check Launcher
         run: |

tests/test_eventloop.py

@@ -100,14 +100,6 @@ def test_cocoa_loop(kernel):
 
 @pytest.mark.parametrize("gui", qt_guis_avail)
 def test_qt_enable_gui(gui, kernel, capsys):
-    if os.getenv("GITHUB_ACTIONS", None) == "true" and gui == "qt5":
-        pytest.skip("Qt5 and GitHub action crash CPython")
-    if gui == "qt6" and sys.version_info < (3, 10):
-        pytest.skip(
-            "qt6 fails on 3.9 with AttributeError: module 'PySide6.QtPrintSupport' has no attribute 'QApplication'"
-        )
-    if sys.platform == "linux" and gui == "qt6" and os.getenv("GITHUB_ACTIONS", None) == "true":
-        pytest.skip("qt6 fails on github CI with missing libEGL.so.1")
     enable_gui(gui, kernel)
 
     # We store the `QApplication` instance in the kernel.

tests/test_matplotlib_eventloops.py

@@ -1,4 +1,3 @@
-import os
 import sys
 import time
 
@@ -38,9 +37,6 @@ def execute(
 def test_matplotlib_gui(kc, gui):
     """Make sure matplotlib activates and its eventloop runs while the kernel is also responsive"""
     pytest.importorskip("matplotlib", reason="this test requires matplotlib")
-    if gui in {"tk", "qt"} and os.getenv("GITHUB_ACTIONS") and sys.platform == "linux":
-        pytest.skip("tk, qt tests not working yet on Linux CI")
-
     stdout, stderr = execute(kc, f"%matplotlib {gui}")
     assert not stderr
     # debug: show output from invoking the matplotlib magic