fix(tests): run sandbox integration on firecracker

tests/unit/test_docker_test_helpers.py

@@ -0,0 +1,35 @@
+"""Tests for integration-test backend selection helpers."""
+
+from __future__ import annotations
+
+import os
+import unittest
+from unittest.mock import patch
+
+from tests._docker import skip_unless_docker_or_firecracker
+
+
+class TestSkipUnlessDockerOrFirecracker(unittest.TestCase):
+    def test_firecracker_runs_when_docker_tests_are_disabled(self):
+        with patch.dict(
+            os.environ,
+            {"BOT_BOTTLE_BACKEND": "firecracker", "SKIP_DOCKER_TESTS": "1"},
+            clear=True,
+        ):
+            decorated = skip_unless_docker_or_firecracker()(type("Case", (), {}))
+
+        self.assertFalse(getattr(decorated, "__unittest_skip__", False))
+
+    def test_non_firecracker_still_skips_when_docker_tests_are_disabled(self):
+        with patch.dict(
+            os.environ,
+            {"BOT_BOTTLE_BACKEND": "docker", "SKIP_DOCKER_TESTS": "1"},
+            clear=True,
+        ):
+            decorated = skip_unless_docker_or_firecracker()(type("Case", (), {}))
+
+        self.assertTrue(decorated.__unittest_skip__)
+
+
+if __name__ == "__main__":
+    unittest.main()