refactor(tests): decouple unittests from integration tests (#15473)

* refactor move all tests to be under integration_tests package

* refactor decouple unittests from integration tests - commands

* add unit_tests package

* fix celery_tests.py

* fix wrong FIXTURES_DIR value

tests/integration_tests/db_engine_specs/sqlite_tests.py

@@ -0,0 +1,78 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+from unittest import mock
+
+from superset.db_engine_specs.sqlite import SqliteEngineSpec
+from tests.integration_tests.db_engine_specs.base_tests import TestDbEngineSpec
+
+
+class TestSQliteDbEngineSpec(TestDbEngineSpec):
+    def test_convert_dttm(self):
+        dttm = self.get_dttm()
+
+        self.assertEqual(
+            SqliteEngineSpec.convert_dttm("TEXT", dttm), "'2019-01-02 03:04:05.678900'"
+        )
+
+    def test_convert_dttm_lower(self):
+        dttm = self.get_dttm()
+
+        self.assertEqual(
+            SqliteEngineSpec.convert_dttm("text", dttm), "'2019-01-02 03:04:05.678900'"
+        )
+
+    def test_convert_dttm_invalid_type(self):
+        dttm = self.get_dttm()
+
+        self.assertEqual(SqliteEngineSpec.convert_dttm("other", dttm), None)
+
+    def test_get_all_datasource_names_table(self):
+        database = mock.MagicMock()
+        database.get_all_schema_names.return_value = ["schema1"]
+        table_names = ["table1", "table2"]
+        get_tables = mock.MagicMock(return_value=table_names)
+        database.get_all_table_names_in_schema = get_tables
+        result = SqliteEngineSpec.get_all_datasource_names(database, "table")
+        assert result == table_names
+        get_tables.assert_called_once_with(
+            schema="schema1",
+            force=True,
+            cache=database.table_cache_enabled,
+            cache_timeout=database.table_cache_timeout,
+        )
+
+    def test_get_all_datasource_names_view(self):
+        database = mock.MagicMock()
+        database.get_all_schema_names.return_value = ["schema1"]
+        views_names = ["view1", "view2"]
+        get_views = mock.MagicMock(return_value=views_names)
+        database.get_all_view_names_in_schema = get_views
+        result = SqliteEngineSpec.get_all_datasource_names(database, "view")
+        assert result == views_names
+        get_views.assert_called_once_with(
+            schema="schema1",
+            force=True,
+            cache=database.table_cache_enabled,
+            cache_timeout=database.table_cache_timeout,
+        )
+
+    def test_get_all_datasource_names_invalid_type(self):
+        database = mock.MagicMock()
+        database.get_all_schema_names.return_value = ["schema1"]
+        invalid_type = "asdf"
+        with self.assertRaises(Exception):
+            SqliteEngineSpec.get_all_datasource_names(database, invalid_type)