fix: ignore virtualenvs in test init guard

scripts/check_test_init_files.py

@@ -5,12 +5,25 @@ from __future__ import annotations
 
 import sys
 from argparse import ArgumentParser
+from os import walk
 from pathlib import Path
 
 EXCLUDED_TEST_INIT_ROOTS = {
     Path("tests/lib/check/fixtures/checks_folder"),
 }
 
+IGNORED_DIRECTORY_NAMES = {
+    ".git",
+    ".mypy_cache",
+    ".nox",
+    ".pytest_cache",
+    ".tox",
+    ".venv",
+    "__pycache__",
+    "node_modules",
+    "venv",
+}
+
 
 def is_test_init_file(path: Path) -> bool:
     """Return True when the file is a test __init__.py."""
@@ -27,11 +40,23 @@ def is_excluded_test_init_file(path: Path, root: Path) -> bool:
 
 def find_test_init_files(root: Path) -> list[Path]:
     """Return sorted __init__.py files found under test directories."""
-    return sorted(
-        path
-        for path in root.rglob("__init__.py")
-        if is_test_init_file(path) and not is_excluded_test_init_file(path, root)
-    )
+    matches = []
+
+    for current_root, directories, filenames in walk(root):
+        directories[:] = [
+            directory
+            for directory in directories
+            if directory not in IGNORED_DIRECTORY_NAMES
+        ]
+        if "__init__.py" in filenames:
+            path = Path(current_root) / "__init__.py"
+        else:
+            continue
+
+        if is_test_init_file(path) and not is_excluded_test_init_file(path, root):
+            matches.append(path)
+
+    return sorted(matches)
 
 
 def main(argv: list[str] | None = None) -> int:

tests/lib/check_test_init_files_test.py

@@ -47,6 +47,30 @@ def test_find_test_init_files_detects_only_test_directories(tmp_path):
     ]
 
 
+def test_find_test_init_files_ignores_virtualenv_test_packages(tmp_path):
+    guard = load_guard_module()
+
+    virtualenv_tests = (
+        tmp_path
+        / ".venv"
+        / "lib"
+        / "python3.12"
+        / "site-packages"
+        / "package"
+        / "tests"
+    )
+    virtualenv_tests.mkdir(parents=True)
+    (virtualenv_tests / "__init__.py").write_text("")
+    (tmp_path / "tests" / "providers" / "aws").mkdir(parents=True)
+    (tmp_path / "tests" / "providers" / "aws" / "__init__.py").write_text("")
+
+    matches = guard.find_test_init_files(tmp_path)
+
+    assert [path.relative_to(tmp_path) for path in matches] == [
+        Path("tests/providers/aws/__init__.py"),
+    ]
+
+
 def test_main_returns_error_when_test_init_files_exist(tmp_path, capsys):
     guard = load_guard_module()