chore: import upstream snapshot with attribution

dev/flavors/tests/test_cli.py

@@ -0,0 +1,45 @@
+import subprocess
+import sys
+from unittest import mock
+
+import pytest
+from flavors import _cli
+
+
+def _run(*args: str) -> subprocess.CompletedProcess[str]:
+    return subprocess.run(
+        [sys.executable, "-m", "flavors._cli", *args],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+
+
+@pytest.mark.parametrize("args", [(), ("matrix",), ("update",)])
+def test_help_succeeds(args: tuple[str, ...]) -> None:
+    result = _run(*args, "--help")
+    assert result.returncode == 0
+    assert "flavors" in result.stdout
+
+
+def test_missing_subcommand_exits_nonzero() -> None:
+    result = _run()
+    assert result.returncode != 0
+
+
+def test_matrix_dispatch_invokes_matrix_run() -> None:
+    with mock.patch("flavors._matrix.run", new_callable=mock.AsyncMock) as mock_run:
+        with mock.patch.object(sys, "argv", ["flavors", "matrix", "--no-dev"]):
+            _cli.main()
+        mock_run.assert_called_once()
+        ns = mock_run.call_args.args[0]
+        assert ns.no_dev is True
+
+
+def test_update_dispatch_invokes_update_run() -> None:
+    with mock.patch("flavors._update.run") as mock_run:
+        with mock.patch.object(sys, "argv", ["flavors", "update", "--skip-yml"]):
+            _cli.main()
+        mock_run.assert_called_once()
+        ns = mock_run.call_args.args[0]
+        assert ns.skip_yml is True