fix: update tests for argparse in main.py

Mock sys.argv in test_main_function to avoid pytest arg conflicts.
Add test_main_version and test_main_as_script_version to verify
--version works both in-process and as a subprocess.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: JonZeolla

{{cookiecutter.project_name|replace(" ", "")}}/tests/test_main.py

@@ -22,14 +22,20 @@ def test_main_function():
     """Test that main() raises NotImplementedError"""
     from main import main
 
-    # Mock the argument parsing to avoid conflicts with pytest args
-    with patch("{{ cookiecutter.project_slug }}.config.get_args_config") as mock_args:
-        import logging
+    with patch("sys.argv", ["main"]):
+        with pytest.raises(NotImplementedError):
+            main()
 
-        mock_args.return_value = {"loglevel": logging.WARNING}
 
-        with pytest.raises(NotImplementedError):
+@pytest.mark.unit
+def test_main_version():
+    """Test that --version prints the version and exits"""
+    from main import main
+
+    with patch("sys.argv", ["main", "--version"]):
+        with pytest.raises(SystemExit) as exc_info:
             main()
+        assert exc_info.value.code == 0
 
 
 @pytest.mark.unit
@@ -46,3 +52,18 @@ def test_main_as_script():
     # Should exit with code 1 due to NotImplementedError
     assert result.returncode == 1
     assert "NotImplementedError" in result.stderr
+
+
+@pytest.mark.unit
+def test_main_as_script_version():
+    """Test that --version works when run as a script"""
+    main_path = Path(__file__).parent.parent / "src" / "main.py"
+
+    result = subprocess.run(
+        [sys.executable, str(main_path), "--version"],
+        capture_output=True,
+        text=True,
+    )
+
+    assert result.returncode == 0
+    assert "0.0.0" in result.stdout