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/utils/encrypt_tests.py

@@ -0,0 +1,63 @@
+# 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 typing import Any, Dict, List, Optional
+
+from sqlalchemy import String, TypeDecorator
+from sqlalchemy_utils import EncryptedType
+from sqlalchemy_utils.types.encrypted.encrypted_type import StringEncryptedType
+
+from superset.extensions import encrypted_field_factory
+from superset.utils.encrypt import AbstractEncryptedFieldAdapter, SQLAlchemyUtilsAdapter
+from tests.integration_tests.base_tests import SupersetTestCase
+
+
+class CustomEncFieldAdapter(AbstractEncryptedFieldAdapter):
+    def create(
+        self,
+        app_config: Optional[Dict[str, Any]],
+        *args: List[Any],
+        **kwargs: Optional[Dict[str, Any]]
+    ) -> TypeDecorator:
+        if app_config:
+            return StringEncryptedType(*args, app_config["SECRET_KEY"], **kwargs)
+        else:
+            raise Exception("Missing app_config kwarg")
+
+
+class EncryptedFieldTest(SupersetTestCase):
+    def setUp(self) -> None:
+        self.app.config[
+            "SQLALCHEMY_ENCRYPTED_FIELD_TYPE_ADAPTER"
+        ] = SQLAlchemyUtilsAdapter
+        encrypted_field_factory.init_app(self.app)
+
+        super().setUp()
+
+    def test_create_field(self):
+        field = encrypted_field_factory.create(String(1024))
+        self.assertTrue(isinstance(field, EncryptedType))
+        self.assertEqual(self.app.config["SECRET_KEY"], field.key)
+
+    def test_custom_adapter(self):
+        self.app.config[
+            "SQLALCHEMY_ENCRYPTED_FIELD_TYPE_ADAPTER"
+        ] = CustomEncFieldAdapter
+        encrypted_field_factory.init_app(self.app)
+        field = encrypted_field_factory.create(String(1024))
+        self.assertTrue(isinstance(field, StringEncryptedType))
+        self.assertFalse(isinstance(field, EncryptedType))
+        self.assertEqual(self.app.config["SECRET_KEY"], field.key)