Provide default for implicitly_named_constraints

… so third-party dialect testing won't fail with:

"AttributeError: 'Requirements' object has no
attribute 'implicitly_named_constraints'"

Change-Id: Iafa3e36f3dd169c338dd6eaee21c73aa35e854cc

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/sqlalchemy/testing/requirements.py b/lib/sqlalchemy/testing/requirements.py
index 74ed1ad9b..b1582efe4 100644
--- a/lib/sqlalchemy/testing/requirements.py
+++ b/lib/sqlalchemy/testing/requirements.py
@@ -146,6 +146,12 @@ class SuiteRequirements(Requirements):
         return exclusions.open()
 
     @property
+    def implicitly_named_constraints(self):
+        """target database must apply names to unnamed constraints."""
+
+        return exclusions.open()
+
+    @property
     def subqueries(self):
         """Target database must support subqueries."""