Test illegal "boolean" values without Boolean datatype

Adjust a test that attempts to verify that a CHECK constraint
has been dropped to use raw SQL, as the Boolean datatype
in SQLAlchemy 1.1 is coercing the target value of "10" to a "1"
 in any case.   Starting with SQLAlchemy 1.2, the Python-side
Boolean datatype will also raise an error.

Change-Id: I99ffce63f9646323d9e2e3079e52b4829d996ea6

oslo_db/tests/sqlalchemy/test_utils.py

@@ -832,7 +832,19 @@ class TestMigrationUtils(db_test_base.DbTestCase):
         table = Table(table_name, self.meta, autoload=True)
         # NOTE(I159): if the CHECK constraint has been dropped (expected
         # behavior), any integer value can be inserted, otherwise only 1 or 0.
-        self.engine.execute(table.insert({'deleted': 10}))
+        # NOTE(zzzeek): SQLAlchemy 1.2 Boolean type will disallow non 1/0
+        # value here, 1.1 also coerces to "1/0" so use raw SQL to test the
+        # constraint
+        with self.engine.connect() as conn:
+            conn.execute(
+                "INSERT INTO abc (deleted) VALUES (?)",
+                (10, )
+            )
+
+            self.assertEqual(
+                10,
+                conn.scalar("SELECT deleted FROM abc")
+            )
 
     def test_get_foreign_key_constraint_name(self):
         table_1 = Table('table_name_1', self.meta,