Add test for virtualenv stability (#344)

pyproject.toml

@@ -54,6 +54,7 @@ optional-dependencies.testing = [
   "pytest-cov>=4.1",
   "pytest-mock>=3.12",
   "pytest-timeout>=2.2",
+  "virtualenv>=20.26.2",
 ]
 optional-dependencies.typing = [
   "typing-extensions>=4.8; python_version<'3.11'",

tests/test_virtualenv.py

@@ -0,0 +1,12 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from virtualenv import cli_run
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
+def test_virtualenv(tmp_path: Path) -> None:
+    cli_run([str(tmp_path), "--no-pip", "--no-setuptools", "--no-periodic-update"])

tox.ini

@@ -107,3 +107,4 @@ extras =
 commands =
     python -m pip list --format=columns
     python -c 'import sys; print(sys.executable)'
+uv_seed = true