Switch from Nox to Tox for multi-version Python testing

.github/workflows/testing-and-deployment.yml

@@ -46,10 +46,10 @@ jobs:
           sudo apt-get update
           xargs -r sudo apt-get install -y < packages.txt
 
-      - name: Install Testing Requirements
+      - name: Install tox
         run: |
-          pip install -e .[test]
+          pip install tox tox-gh-actions
 
-      - name: Unit Testing
+      - name: Run tests with tox
         run: |
-          export PYTHONPATH=. && xvfb-run python -m pytest -v
+          export PYTHONPATH=. && xvfb-run tox

tox.ini

@@ -0,0 +1,36 @@
+[tox]
+requires =
+    tox>=4.2
+env_list =
+    py311
+    py312
+    py313
+
+[gh-actions]
+python =
+    3.11: py311
+    3.12: py312
+    3.13: py313
+
+[testenv]
+description = Run tests with pytest
+deps =
+    {[project]extras=test}
+commands =
+    pytest {posargs}
+
+[testenv:docs]
+description = Build documentation with Sphinx
+deps =
+    {[project]extras=docs}
+changedir = docs
+commands =
+    sphinx-build -W -b html . _build/html
+
+[testenv:lint]
+description = Run pre-commit hooks
+skip_install = true
+deps =
+    pre-commit
+commands =
+    pre-commit run --all-files {posargs}