Merge pull request #87 from radarhere/deprecate-qt5

Run deprecated import check before imports from other tests

Author: hugovk

.ci/install.sh

@@ -34,12 +34,10 @@ python3 -m pip install pyroma
 python3 -m pip install test-image-results
 python3 -m pip install numpy
 
-# PyQt5 doesn't support PyPy3
+# PyQt6 doesn't support PyPy3
 if [[ $GHA_PYTHON_VERSION == 3.* ]]; then
-  # arm64, ppc64le, s390x CPUs:
-  # "ERROR: Could not find a version that satisfies the requirement pyqt5"
-    sudo apt-get -qq install libxcb-xinerama0 pyqt5-dev-tools
-    python3 -m pip install pyqt5
+    sudo apt-get -qq install libegl1 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxkbcommon-x11-0
+    python3 -m pip install pyqt6
 fi
 
 # webp

Tests/test_deprecated_imageqt.py

@@ -0,0 +1,18 @@
+import warnings
+
+with warnings.catch_warnings(record=True) as w:
+    # Arrange: cause all warnings to always be triggered
+    warnings.simplefilter("always")
+
+    # Act: trigger a warning with Qt5
+    from PIL import ImageQt
+
+
+def test_deprecated():
+    # Assert
+    if ImageQt.qt_version in ("5", "side2"):
+        assert len(w) == 1
+        assert issubclass(w[0].category, DeprecationWarning)
+        assert "deprecated" in str(w[0].message)
+    else:
+        assert len(w) == 0