Let adapter plugins provide configured endpoints

tests/test_cli_reconcile.py

@@ -150,6 +150,15 @@ class ReconcileCliTests(unittest.TestCase):
             verizon_endpoint.identity: verizon,
         }
 
+        def endpoint_loader(name, config):
+            if name == "npm":
+                return (npm_endpoint,)
+            if name == "verizon":
+                return (verizon_endpoint,)
+            raise AssertionError(
+                f"Unexpected adapter plugin: {name}"
+            )
+
         def loader(name, config, endpoint):
             return adapters[endpoint.identity]
 
@@ -167,6 +176,9 @@ class ReconcileCliTests(unittest.TestCase):
                     "ENABLED_PLUGINS": "npm,verizon",
                 },
                 clear=True,
+            ), patch(
+                "dns_sync.cli.configured_adapter_endpoints",
+                side_effect=endpoint_loader,
             ), patch(
                 "dns_sync.cli.load_adapter",
                 side_effect=loader,