Add Nox configuration, to run tests locally across Python versions

MANIFEST.in

@@ -20,6 +20,7 @@ recursive-exclude wasmtime/bindgen/generated *.py *.wasm
 include .flake8
 include CONTRIBUTING.md
 include mypy.ini
+include noxfile.py
 include pytest.ini
 include VERSION
 

noxfile.py

@@ -0,0 +1,18 @@
+import nox
+
+PYPROJECT = nox.project.load_toml('pyproject.toml')
+
+PYTHONS = [
+    # Reads versions from Trove classifiers
+    *nox.project.python_versions(PYPROJECT),
+]
+
+# Prefer uv to create virtual environments, fall back to virtualenv.
+# Overriden by $NOX_DEFAULT_VENV_BACKEND=... or nox --default-venv-backend ...
+# https://nox.thea.codes/en/stable/usage.html#changing-the-sessions-default-backend
+nox.options.default_venv_backend = 'uv|virtualenv'
+
+@nox.session(python=PYTHONS, tags=["test"])
+def tests(session):
+    session.install('.[testing]')
+    session.run('coverage', 'run', '-m', 'pytest')

pytest.ini

@@ -1,5 +1,13 @@
 [pytest]
-addopts = --doctest-modules --mypy --ignore-glob=tests/bindgen/*/app.py
+addopts =
+    --doctest-modules
+    --ignore-glob=tests/bindgen/*/app.py
+    --ignore-glob=noxfile.py
+    --mypy
 norecursedirs = 
+    .*
+    *.egg
+    build
     ci/_custom_build
+    dist
     tests/bindgen/generated/*