Extract shared adapter validation helpers

tests/test_verizon_adapter.py

@@ -5,6 +5,7 @@ from unittest.mock import Mock, patch
 from dns_sync.adapters import (
     DNS_RECORDS,
     Capability,
+    Endpoint,
     CapabilityOperation,
     NormalizedObject,
     PlanAction,
@@ -79,6 +80,32 @@ class VerizonAdapterTests(unittest.TestCase):
             },
         )
 
+    def test_adapter_rejects_endpoint_for_other_plugin(self):
+        config = self.config()
+        endpoint = Endpoint(
+            "npm",
+            "192.168.1.3:81",
+        )
+
+        with patch.dict(
+            os.environ,
+            {
+                "ENABLED_PLUGINS": "npm,verizon",
+                "DNS_SYNC_PLUGIN_PATH": "external_plugins",
+            },
+            clear=False,
+        ):
+            with self.assertRaisesRegex(
+                RuntimeError,
+                "cannot use endpoint",
+            ):
+                load_adapter(
+                    "verizon",
+                    config,
+                    endpoint,
+                )
+
+
     def test_capabilities_cover_dns_discovery_apply_and_verify(self):
         adapter = self.adapter(Mock())
 
@@ -259,7 +286,7 @@ class VerizonAdapterTests(unittest.TestCase):
         with self.assertRaisesRegex(RuntimeError, "cannot discover"):
             adapter.discover("certificates")
 
-        with self.assertRaisesRegex(RuntimeError, "different endpoint"):
+        with self.assertRaisesRegex(RuntimeError, "does not belong"):
             adapter.apply(
                 PlanAction(
                     endpoint_id="verizon://different:443",