🚧 WIP

backend/tests/test_configgen.py

@@ -46,9 +46,12 @@ def test_generate_includes_global_settings(session):
     assert "max_packet_size 2000000" in result.config_text
 
 
-def test_generate_refuses_without_listeners(session):
-    with pytest.raises(ValueError, match="no enabled listeners"):
-        generate_config(session)
+def test_generate_with_empty_model_warns_instead_of_raising(session):
+    """Fresh-platform state: preview must work, not 500 (config page fix)."""
+    result = generate_config(session)
+    assert "global_plugin /usr/lib/mosquitto_dynamic_security.so" in result.config_text
+    assert "persistence true" in result.config_text
+    assert any("No enabled listeners" in w for w in result.warnings)
 
 
 def test_disabled_listeners_are_omitted(session):