Fix pyqtgraph in CI

.github/workflows/deploy.yml

@@ -15,6 +15,11 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      - name: Install pyqtgraph dependencies
+        # https://pytest-qt.readthedocs.io/en/latest/troubleshooting.html#github-actions
+        uses: tlambert03/setup-qt-libs@v1
+      - name: Setup headless display
+        uses: pyvista/setup-headless-display-action@v2
       - name: Install poetry
         run: pipx install poetry==1.7.1
       - name: Set up Python

.github/workflows/tests.yml

@@ -38,6 +38,11 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      - name: Install pyqtgraph dependencies
+        # https://pytest-qt.readthedocs.io/en/latest/troubleshooting.html#github-actions
+        uses: tlambert03/setup-qt-libs@v1
+      - name: Setup headless display
+        uses: pyvista/setup-headless-display-action@v2
       - name: Install poetry
         run: pipx install poetry==1.7.1
       - name: Set up Python
@@ -62,6 +67,11 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      - name: Install pyqtgraph dependencies
+        # https://pytest-qt.readthedocs.io/en/latest/troubleshooting.html#github-actions
+        uses: tlambert03/setup-qt-libs@v1
+      - name: Setup headless display
+        uses: pyvista/setup-headless-display-action@v2
       - name: Install poetry
         run: pipx install poetry==1.7.1
       - name: Set up Python

src/symmeplot/utilities/testing.py

@@ -0,0 +1,3 @@
+import os
+
+ON_CI = os.getenv("CI", None) == "true"

tests/core/test_core_plot_objects.py

@@ -1,9 +1,9 @@
-
 import numpy as np
 import pytest
 import symmeplot.utilities.dummy_backend as dummy
 import sympy as sm
 import sympy.physics.mechanics as me
+from symmeplot.utilities.testing import ON_CI
 
 try:
     import symmeplot.matplotlib as matplotlib
@@ -16,7 +16,7 @@
 
 parametrize_backends = pytest.mark.parametrize(
     "backend", [pytest.param(backend, marks=pytest.mark.skipif(
-        backend is None, reason="Backend not installed."))
+        backend is None and not ON_CI, reason="Backend not installed."))
                 for backend in (dummy, matplotlib, pyqtgraph)])
 
 
@@ -157,7 +157,7 @@ def test_scale(self, backend):
 class TestPlotBodyMixin:
     @pytest.fixture(autouse=True)
     def _define_system(self, backend):
-        if backend is None:
+        if backend is None and not ON_CI:
             pytest.skip("Backend not installed.")
         self.q = sm.symbols("q")
         self.N, self.O = me.ReferenceFrame("N"), me.Point("O")

tests/core/test_core_scene.py

@@ -5,6 +5,7 @@
 import pytest
 import symmeplot.utilities.dummy_backend as dummy
 import sympy.physics.mechanics as me
+from symmeplot.utilities.testing import ON_CI
 
 try:
     import symmeplot.matplotlib as matplotlib
@@ -17,7 +18,7 @@
 
 parametrize_backends = pytest.mark.parametrize(
     "backend", [pytest.param(backend, marks=pytest.mark.skipif(
-        backend is None, reason="Backend not installed."))
+        backend is None and not ON_CI, reason="Backend not installed."))
                 for backend in (dummy, matplotlib, pyqtgraph)])
 
 @pytest.fixture(scope="module", autouse=True)
@@ -29,7 +30,7 @@ def mock_visualization():
         )
     if pyqtgraph is not None:
         to_patch.append(patch("pyqtgraph.exec"))
-        to_patch.append(patch("pyqtgraph.opengl.GLViewWidget.GLViewWidget.show"))
+        to_patch.append(patch("pyqtgraph.opengl.GLViewWidget.show"))
     with contextlib.ExitStack() as stack:
         for mgr in to_patch:
             stack.enter_context(mgr)
@@ -38,7 +39,7 @@ def mock_visualization():
 @parametrize_backends
 class TestScene3D:
     @pytest.fixture(autouse=True)
-    @pytest.mark.skipif("backend == None")
+    @pytest.mark.skipif("backend == None and not ON_CI")
     def _define_system(self):
         self.q = me.dynamicsymbols("q:3")
         self.rf = me.ReferenceFrame("rf")

tests/matplotlib/test_mpl_artists.py

@@ -1,9 +1,12 @@
 import numpy as np
 import pytest
+from symmeplot.utilities.testing import ON_CI
 
 try:
     from symmeplot.matplotlib.artists import Circle3D, Line3D, Vector3D
-except ImportError:
+except ImportError as e:
+    if ON_CI:
+        raise e
     pytest.skip("Matplotlib not installed.", allow_module_level=True)
 
 

tests/matplotlib/test_mpl_plot_objects.py

@@ -2,6 +2,7 @@
 import pytest
 import sympy as sm
 import sympy.physics.mechanics as me
+from symmeplot.utilities.testing import ON_CI
 
 try:
     from symmeplot.matplotlib import (
@@ -11,7 +12,9 @@
         PlotPoint,
         PlotVector,
     )
-except ImportError:
+except ImportError as e:
+    if ON_CI:
+        raise e
     pytest.skip("Matplotlib not installed.", allow_module_level=True)
 
 

tests/matplotlib/test_mpl_scene.py

@@ -2,11 +2,14 @@
 
 import pytest
 import sympy.physics.mechanics as me
+from symmeplot.utilities.testing import ON_CI
 
 try:
     import matplotlib.pyplot as plt
     from symmeplot.matplotlib import PlotFrame, Scene3D
-except ImportError:
+except ImportError as e:
+    if ON_CI:
+        raise e
     pytest.skip("Matplotlib not installed.", allow_module_level=True)
 
 

tests/pyqtgraph/test_pg_artists.py

@@ -2,6 +2,7 @@
 
 import numpy as np
 import pytest
+from symmeplot.utilities.testing import ON_CI
 
 try:
     from pyqtgraph.opengl import GLLinePlotItem, GLMeshItem, MeshData
@@ -11,7 +12,9 @@
         Vector3D,
         create_tube_mesh_data,
     )
-except ImportError:
+except ImportError as e:
+    if ON_CI:
+        raise e
     pytest.skip("PyQtGraph not installed.", allow_module_level=True)
 
 class TestTubeMeshData: