Add compatibility test for SQLAlchemy version support

Co-authored-by: nomeguy <85475922+nomeguy@users.noreply.github.com>

Author: Copilot

tests/test_compatibility.py

@@ -0,0 +1,21 @@
+"""
+Test compatibility with different SQLAlchemy versions.
+
+This test ensures the adapter works with both SQLAlchemy 1.4.x and 2.x.
+"""
+import sqlalchemy
+from casbin import Enforcer
+from databases import Database
+
+
+async def test_sqlalchemy_version_info(db: Database, enforcer: Enforcer):
+    """Test that reports which SQLAlchemy version is being used."""
+    print(f"\nTesting with SQLAlchemy version: {sqlalchemy.__version__}")
+    
+    # Verify basic enforcement works
+    assert enforcer.enforce("alice", "data1", "read") == True
+    assert enforcer.enforce("bob", "data2", "write") == True
+    
+    # This test should pass with both SQLAlchemy 1.4.x and 2.x
+    major_version = int(sqlalchemy.__version__.split('.')[0])
+    assert major_version in [1, 2], f"Unexpected SQLAlchemy version: {sqlalchemy.__version__}"