A couple of sa dialect tests for postgresdql and mysql from legacy

lib/dl_connector_mysql/dl_connector_mysql_tests/db/core/test_sa_dialect.py

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+import datetime
+
+import pytest
+import sqlalchemy as sa
+import sqlalchemy.dialects.mysql
+import sqlalchemy.sql.sqltypes
+
+from dl_connector_mysql_tests.db.core.base import BaseMySQLTestClass
+
+
+class TestMySQLSaDialect(BaseMySQLTestClass):
+    @pytest.mark.parametrize(
+        ("value", "type_", "expected"),
+        (
+            pytest.param(
+                datetime.date(2022, 1, 2), sqlalchemy.sql.sqltypes.Date(), datetime.date(2022, 1, 2), id="date-as-date"
+            ),
+            pytest.param("2022-01-02", sqlalchemy.dialects.mysql.DATE(), datetime.date(2022, 1, 2), id="date-as-string"),
+            pytest.param(
+                datetime.datetime(2022, 1, 2, 12, 59, 59),
+                sqlalchemy.sql.sqltypes.DateTime(),
+                datetime.datetime(2022, 1, 2, 12, 59, 59),
+                id="datetime-as-datetime",
+            ),
+            pytest.param(
+                "2022-01-02T12:59:59",
+                sqlalchemy.dialects.mysql.DATETIME(fsp=6),
+                datetime.datetime(2022, 1, 2, 12, 59, 59),
+                id="datetime-as-string",
+            ),
+        ),
+    )
+    def test_mysql_literal_bind_datetimes(self, value, type_, expected, db):
+        execute = db.execute
+        dialect = db._engine_wrapper.dialect
+
+        query = sa.select([sa.literal(value, type_=type_)])
+        compiled = str(query.compile(dialect=dialect, compile_kwargs={"literal_binds": True}))
+        res_literal = list(execute(compiled))
+        assert res_literal[0][0] == expected

lib/dl_connector_postgresql/dl_connector_postgresql_tests/db/core/test_sa_dialect.py

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+import datetime
+
+import pytest
+import pytz
+import sqlalchemy as sa
+
+from dl_connector_postgresql_tests.db.core.base import BasePostgreSQLTestClass
+
+
+TEST_VALUES = [datetime.date(2020, 1, 1)] + [
+    datetime.datetime(2020, idx1 + 1, idx2 + 1, 3, 4, 5, us).replace(tzinfo=tzinfo)
+    for idx1, us in enumerate((0, 123356))
+    for idx2, tzinfo in enumerate(
+        (
+            None,
+            datetime.timezone.utc,
+            pytz.timezone("America/New_York"),
+        )
+    )
+]
+
+
+class TestPostgresqlSaDialect(BasePostgreSQLTestClass):
+    @pytest.mark.parametrize("value", TEST_VALUES, ids=[val.isoformat() for val in TEST_VALUES])
+    def test_pg_literal_bind_datetimes(self, value, db):
+        """
+        Test that query results for literal_binds matches the query results without,
+        for the custom dialect code.
+
+        This test should be in the bi_postgresql dialect itself, but it doesn't have
+        a postgres-using test at the moment.
+        """
+        execute = db.execute
+        dialect = db._engine_wrapper.dialect
+
+        query = sa.select([sa.literal(value)])
+        compiled = str(query.compile(dialect=dialect, compile_kwargs={"literal_binds": True}))
+        res_direct = list(execute(query))
+        res_literal = list(execute(compiled))
+        assert res_direct == res_literal, dict(literal_query=compiled)