feat(backend): default to smolmachines

tests/unit/test_backend_selection.py

@@ -32,10 +32,10 @@ class TestGetBottleBackend(unittest.TestCase):
             b = get_bottle_backend()
         self.assertEqual("smolmachines", b.name)
 
-    def test_default_docker(self):
+    def test_default_smolmachines(self):
         with patch.dict(os.environ, {}, clear=True):
             b = get_bottle_backend()
-        self.assertEqual("docker", b.name)
+        self.assertEqual("smolmachines", b.name)
 
     def test_unknown_dies(self):
         with patch.object(backend_mod, "die", side_effect=SystemExit("die")):

tests/unit/test_cli_start_backend_flag.py

@@ -39,7 +39,7 @@ class TestStartBackendFlag(unittest.TestCase):
         self.assertEqual("smolmachines", args.backend)
         self.assertEqual("researcher", args.name)
 
-    def test_flag_default_none_means_env_or_docker(self):
+    def test_flag_default_none_means_env_or_default_backend(self):
         args = self._build_parser().parse_args(["researcher"])
         self.assertIsNone(args.backend)
 

tests/unit/test_smolmachines_util.py

@@ -85,6 +85,7 @@ class TestPreflight(unittest.TestCase):
             msg = captured.getvalue()
             self.assertIn("smolvm", msg)
             self.assertIn("smolmachines.com/install.sh", msg)
+            self.assertIn("BOT_BOTTLE_BACKEND=docker", msg)
 
 
 if __name__ == "__main__":