Add new logic

tests/test_forbid_articles_in_test_filenames.py

@@ -0,0 +1,56 @@
+import subprocess
+import sys
+from pathlib import Path
+
+
+HOOK = Path(__file__).parents[1] / "pre_commit_hooks" / "forbid_articles_in_test_filenames.py"
+
+
+def run_hook(repo_path: Path):
+    """Run the hook in a temporary git repo and return (exit_code, stdout)."""
+    result = subprocess.run(
+        [sys.executable, str(HOOK)],
+        cwd=repo_path,
+        capture_output=True,
+        text=True,
+    )
+    return result.returncode, result.stdout.strip()
+
+
+def init_git_repo(tmp_path: Path):
+    subprocess.run(["git", "init"], cwd=tmp_path, check=True)
+    subprocess.run(["git", "config", "user.email", "test@example.com"], cwd=tmp_path, check=True)
+    subprocess.run(["git", "config", "user.name", "Test User"], cwd=tmp_path, check=True)
+
+
+def git_add_all(tmp_path: Path):
+    subprocess.run(["git", "add", "."], cwd=tmp_path, check=True)
+
+
+def test_fails_on_forbidden_article_in_test_filename(tmp_path: Path):
+    init_git_repo(tmp_path)
+
+    bad_test = tmp_path / "tests_create_an_address.py"
+    bad_test.write_text("def test_something(): pass\n")
+
+    git_add_all(tmp_path)
+
+    code, output = run_hook(tmp_path)
+
+    assert code == 1
+    assert "ERROR: Forbidden article in test filename:" in output
+    assert "tests_create_an_address.py" in output
+
+
+def test_passes_on_valid_test_filename(tmp_path: Path):
+    init_git_repo(tmp_path)
+
+    good_test = tmp_path / "tests_create_address.py"
+    good_test.write_text("def test_something(): pass\n")
+
+    git_add_all(tmp_path)
+
+    code, output = run_hook(tmp_path)
+
+    assert code == 0
+    assert output == ""