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from datetime import datetime

from superset.db_engine_specs.mysql import MySQLEngineSpec
from superset.models.core import Database
from tests.base_tests import SupersetTestCase

from tests.test_app import app  # isort:skip


class DbEngineSpecTestCase(SupersetTestCase):
    def sql_limit_regex(
        self, sql, expected_sql, engine_spec_class=MySQLEngineSpec, limit=1000
    ):
        main = Database(database_name="test_database", sqlalchemy_uri="sqlite://")
        limited = engine_spec_class.apply_limit_to_sql(sql, limit, main)
        self.assertEqual(expected_sql, limited)

    def get_dttm(self):
        return datetime.strptime("2019-01-02 03:04:05.678900", "%Y-%m-%d %H:%M:%S.%f")