Ensure length parameter of Enum is adapted to new objects

Ensure length parameter added to Enum in
Iea05dc8cd9e33959bb968b394fb10a7dd068c873 is correctly propagated
to new enum objects adapted from this one.

Fixes: #5183

`

Change-Id: I7f20d926f73ec8260938963df87e29894c7e55e2

1 files changed, 12 insertions, 0 deletions

diff --git a/test/sql/test_types.py b/test/sql/test_types.py
index aca9a5b06..4b1fb6a72 100644
--- a/test/sql/test_types.py
+++ b/test/sql/test_types.py
@@ -1803,6 +1803,18 @@ class EnumTest(AssertsCompiledSQL, fixtures.TablesTest):
         eq_(e1_vc.adapt(ENUM).name, "someotherenum")
         eq_(e1_vc.adapt(ENUM).enums, ["1", "2", "3", "a", "b"])
 
+    def test_adapt_length(self):
+        from sqlalchemy.dialects.postgresql import ENUM
+
+        e1 = Enum("one", "two", "three", length=50, native_enum=False)
+        eq_(e1.adapt(ENUM).length, 50)
+        eq_(e1.adapt(Enum).length, 50)
+
+        e1 = Enum("one", "two", "three")
+        eq_(e1.length, 5)
+        eq_(e1.adapt(ENUM).length, 5)
+        eq_(e1.adapt(Enum).length, 5)
+
     @testing.provide_metadata
     def test_create_metadata_bound_no_crash(self):
         m1 = self.metadata