Fix test_export_html and run it on CI (#275)

brainrender/render.py

@@ -289,6 +289,7 @@ def export(self, savepath):
         """
         logger.debug(f"Exporting scene to {savepath}")
         _backend = self.backend
+        _default_backend = vsettings.default_backend
 
         if not self.is_rendered:
             self.render(interactive=False)
@@ -302,9 +303,8 @@ def export(self, savepath):
 
         # Create new plotter and save to file
         plt = Plotter()
-        plt.add(self.clean_renderables, render=False)
+        plt.add(self.clean_renderables).render()
         plt = plt.show(interactive=False)
-        plt.camera[-2] = -1
 
         with open(path, "w") as fp:
             fp.write(plt.get_snapshot())
@@ -314,7 +314,7 @@ def export(self, savepath):
         )
 
         # Reset settings
-        vsettings.notebookBackend = None
+        vsettings.default_backend = _default_backend
         self.backend = _backend
 
         return str(path)

tests/test_export_html.py

@@ -5,21 +5,27 @@
 from brainrender import Scene
 
 
-@pytest.mark.local
-def test_export_for_web():
+@pytest.fixture
+def scene():
+    """Provide a scene with a brain region"""
     s = Scene(title="BR")
-
     th = s.add_brain_region("TH")
-
     s.add_label(th, "TH")
+    return s
 
-    path = s.export("test.html")
+
+def test_export_for_web(scene):
+    """Check that exporting to html creates the expected file"""
+    path = scene.export("test.html")
     assert path == "test.html"
 
     path = Path(path)
     assert path.exists()
 
     path.unlink()
 
+
+def test_export_for_web_raises(scene):
+    """Check that exporting with invalid file extention raises ValueError"""
     with pytest.raises(ValueError):
-        path = s.export("test.py")
+        scene.export("test.py")