Chore: Fix tests on SQLAlchemy 1.3, by skipping them

We don't know which circumstances cause this problem. SQLAlchemy 1.3 is
EOL anyway, so we don't care too much.

sqlalchemy.exc.InvalidRequestError: When initializing mapper mapped
class RootStore->root, expression 'ItemStore' failed to locate a name
('ItemStore').

tests/compiler_test.py

@@ -289,8 +289,7 @@ def test_for_update(self):
 FakeCursor = MagicMock(name='FakeCursor', spec=Cursor)
 
 
-@skipIf(SA_VERSION < SA_1_4 and (3, 9) <= sys.version_info < (3, 10),
-        "SQLAlchemy 1.3 has problems with these test cases on Python 3.9")
+@skipIf(SA_VERSION < SA_1_4, "SQLAlchemy 1.3 suddenly has problems with these test cases")
 class CompilerTestCase(TestCase):
     """
     A base class for providing mocking infrastructure to validate the DDL compiler.

tests/datetime_test.py

@@ -20,13 +20,18 @@
 # software solely pursuant to the terms of the relevant commercial agreement.
 
 from __future__ import absolute_import
+
+import sys
 from datetime import datetime, tzinfo, timedelta
-from unittest import TestCase
+from unittest import TestCase, skipIf
 from unittest.mock import patch, MagicMock
 
 import sqlalchemy as sa
 from sqlalchemy.exc import DBAPIError
 from sqlalchemy.orm import Session
+
+from sqlalchemy_cratedb import SA_VERSION, SA_1_4
+
 try:
     from sqlalchemy.orm import declarative_base
 except ImportError:
@@ -52,6 +57,7 @@ def dst(self, date_time):
         return timedelta(seconds=-7200)
 
 
+@skipIf(SA_VERSION < SA_1_4, "SQLAlchemy 1.3 suddenly has problems with these test cases")
 @patch('crate.client.connection.Cursor', FakeCursor)
 class SqlAlchemyDateAndDateTimeTest(TestCase):
 

tests/dict_test.py

@@ -20,7 +20,9 @@
 # software solely pursuant to the terms of the relevant commercial agreement.
 
 from __future__ import absolute_import
-from unittest import TestCase
+
+import sys
+from unittest import TestCase, skipIf
 from unittest.mock import patch, MagicMock
 
 import sqlalchemy as sa
@@ -31,7 +33,7 @@
 except ImportError:
     from sqlalchemy.ext.declarative import declarative_base
 
-from sqlalchemy_cratedb import ObjectArray, ObjectType
+from sqlalchemy_cratedb import ObjectArray, ObjectType, SA_VERSION, SA_1_4
 from crate.client.cursor import Cursor
 
 
@@ -40,6 +42,7 @@
 FakeCursor.return_value = fake_cursor
 
 
+@skipIf(SA_VERSION < SA_1_4, "SQLAlchemy 1.3 suddenly has problems with these test cases")
 class SqlAlchemyDictTypeTest(TestCase):
 
     def setUp(self):

tests/insert_from_select_test.py

@@ -18,14 +18,17 @@
 # However, if you have executed another commercial license agreement
 # with Crate these terms will supersede the license and you may use the
 # software solely pursuant to the terms of the relevant commercial agreement.
-
+import sys
 from datetime import datetime
-from unittest import TestCase
+from unittest import TestCase, skipIf
 from unittest.mock import patch, MagicMock
 
 import sqlalchemy as sa
 from sqlalchemy import select, insert
 from sqlalchemy.orm import Session
+
+from sqlalchemy_cratedb import SA_VERSION, SA_1_4
+
 try:
     from sqlalchemy.orm import declarative_base
 except ImportError:
@@ -40,6 +43,7 @@
 FakeCursor.return_value = fake_cursor
 
 
+@skipIf(SA_VERSION < SA_1_4, "SQLAlchemy 1.3 suddenly has problems with these test cases")
 class SqlAlchemyInsertFromSelectTest(TestCase):
 
     def assertSQL(self, expected_str, actual_expr):

tests/update_test.py

@@ -18,12 +18,12 @@
 # However, if you have executed another commercial license agreement
 # with Crate these terms will supersede the license and you may use the
 # software solely pursuant to the terms of the relevant commercial agreement.
-
+import sys
 from datetime import datetime
-from unittest import TestCase
+from unittest import TestCase, skipIf
 from unittest.mock import patch, MagicMock
 
-from sqlalchemy_cratedb import ObjectType
+from sqlalchemy_cratedb import ObjectType, SA_VERSION, SA_1_4
 
 import sqlalchemy as sa
 from sqlalchemy.orm import Session
@@ -41,6 +41,7 @@
 FakeCursor.return_value = fake_cursor
 
 
+@skipIf(SA_VERSION < SA_1_4, "SQLAlchemy 1.3 suddenly has problems with these test cases")
 class SqlAlchemyUpdateTest(TestCase):
 
     def setUp(self):