Begin Firecracker microVM support

tests/test_dev_command_checks.py

@@ -0,0 +1,36 @@
+from __future__ import annotations
+
+from unittest.mock import patch
+
+from django.test import override_settings
+
+from config.checks import check_required_dev_commands
+
+
+@override_settings(DEBUG=False, TESTING=False)
+def test_command_check_is_silent_in_production_runtime() -> None:
+    """Production runtime must not warn about dev-only command dependencies."""
+    with patch("config.checks.shutil.which", return_value=None):
+        warnings = check_required_dev_commands()
+
+    assert warnings == []
+
+
+@override_settings(DEBUG=True, TESTING=False)
+def test_command_check_warns_and_mentions_dev_only_dependencies() -> None:
+    """Dev runtime must warn and clearly label these dependencies as dev-only."""
+
+    def fake_which(command: str) -> str | None:
+        if command == "curl":
+            return None
+        return f"/usr/bin/{command}"
+
+    with patch("config.checks.shutil.which", side_effect=fake_which):
+        warnings = check_required_dev_commands()
+
+    assert len(warnings) == 1
+    warning = warnings[0]
+    assert warning.id == "tussilago.W001"
+    assert warning.hint is not None
+    assert "Dev-only tooling missing" in warning.hint
+    assert "curl" in warning.hint