chore(tests-backend): migrate snowflake and sqlite to unit tests (#18854)

* migrate snowflake and sqlite

* change structure to better match the other unit tests

Co-authored-by: Corbin Robb <corbin@Corbins-MacBook-Pro.local>

tests/unit_tests/db_engine_specs/test_snowflake.py

@@ -0,0 +1,127 @@
+# 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.
+import json
+from datetime import datetime
+from unittest import mock
+
+import pytest
+from flask.ctx import AppContext
+
+from superset.errors import ErrorLevel, SupersetError, SupersetErrorType
+from tests.unit_tests.fixtures.common import dttm
+
+
+@pytest.mark.parametrize(
+    "actual,expected",
+    [
+        ("DATE", "TO_DATE('2019-01-02')"),
+        ("DATETIME", "CAST('2019-01-02T03:04:05.678900' AS DATETIME)"),
+        ("TIMESTAMP", "TO_TIMESTAMP('2019-01-02T03:04:05.678900')"),
+    ],
+)
+def test_convert_dttm(
+    app_context: AppContext, actual: str, expected: str, dttm: datetime
+) -> None:
+    from superset.db_engine_specs.snowflake import SnowflakeEngineSpec
+
+    assert SnowflakeEngineSpec.convert_dttm(actual, dttm) == expected
+
+
+def test_database_connection_test_mutator(app_context: AppContext) -> None:
+    from superset.db_engine_specs.snowflake import SnowflakeEngineSpec
+    from superset.models.core import Database
+
+    database = Database(sqlalchemy_uri="snowflake://abc")
+    SnowflakeEngineSpec.mutate_db_for_connection_test(database)
+    engine_params = json.loads(database.extra or "{}")
+
+    assert {
+        "engine_params": {"connect_args": {"validate_default_parameters": True}}
+    } == engine_params
+
+
+def test_extract_errors(app_context: AppContext) -> None:
+    from superset.db_engine_specs.snowflake import SnowflakeEngineSpec
+
+    msg = "Object dumbBrick does not exist or not authorized."
+    result = SnowflakeEngineSpec.extract_errors(Exception(msg))
+    assert result == [
+        SupersetError(
+            message="dumbBrick does not exist in this database.",
+            error_type=SupersetErrorType.OBJECT_DOES_NOT_EXIST_ERROR,
+            level=ErrorLevel.ERROR,
+            extra={
+                "engine_name": "Snowflake",
+                "issue_codes": [
+                    {
+                        "code": 1029,
+                        "message": "Issue 1029 - The object does not exist in the given database.",
+                    }
+                ],
+            },
+        )
+    ]
+
+    msg = "syntax error line 1 at position 10 unexpected 'limmmited'."
+    result = SnowflakeEngineSpec.extract_errors(Exception(msg))
+    assert result == [
+        SupersetError(
+            message='Please check your query for syntax errors at or near "limmmited". Then, try running your query again.',
+            error_type=SupersetErrorType.SYNTAX_ERROR,
+            level=ErrorLevel.ERROR,
+            extra={
+                "engine_name": "Snowflake",
+                "issue_codes": [
+                    {
+                        "code": 1030,
+                        "message": "Issue 1030 - The query has a syntax error.",
+                    }
+                ],
+            },
+        )
+    ]
+
+
+@mock.patch("sqlalchemy.engine.Engine.connect")
+def test_get_cancel_query_id(engine_mock: mock.Mock) -> None:
+    from superset.db_engine_specs.snowflake import SnowflakeEngineSpec
+    from superset.models.sql_lab import Query
+
+    query = Query()
+    cursor_mock = engine_mock.return_value.__enter__.return_value
+    cursor_mock.fetchone.return_value = [123]
+    assert SnowflakeEngineSpec.get_cancel_query_id(cursor_mock, query) == 123
+
+
+@mock.patch("sqlalchemy.engine.Engine.connect")
+def test_cancel_query(engine_mock: mock.Mock) -> None:
+    from superset.db_engine_specs.snowflake import SnowflakeEngineSpec
+    from superset.models.sql_lab import Query
+
+    query = Query()
+    cursor_mock = engine_mock.return_value.__enter__.return_value
+    assert SnowflakeEngineSpec.cancel_query(cursor_mock, query, "123") is True
+
+
+@mock.patch("sqlalchemy.engine.Engine.connect")
+def test_cancel_query_failed(engine_mock: mock.Mock) -> None:
+    from superset.db_engine_specs.snowflake import SnowflakeEngineSpec
+    from superset.models.sql_lab import Query
+
+    query = Query()
+    cursor_mock = engine_mock.raiseError.side_effect = Exception()
+    assert SnowflakeEngineSpec.cancel_query(cursor_mock, query, "123") is False