chore(db_engine_specs): clean up column spec logic and add tests (#22871)

tests/unit_tests/db_engine_specs/test_firebolt.py

@@ -0,0 +1,57 @@
+# 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 datetime import datetime
+from typing import Optional
+
+import pytest
+
+from tests.unit_tests.db_engine_specs.utils import assert_convert_dttm
+from tests.unit_tests.fixtures.common import dttm
+
+
+@pytest.mark.parametrize(
+    "target_type,expected_result",
+    [
+        ("Date", "CAST('2019-01-02' AS DATE)"),
+        (
+            "DateTime",
+            "CAST('2019-01-02T03:04:05' AS DATETIME)",
+        ),
+        (
+            "TimeStamp",
+            "CAST('2019-01-02T03:04:05' AS TIMESTAMP)",
+        ),
+        ("UnknownType", None),
+    ],
+)
+def test_convert_dttm(
+    target_type: str, expected_result: Optional[str], dttm: datetime
+) -> None:
+    from superset.db_engine_specs.firebolt import FireboltEngineSpec as spec
+
+    assert_convert_dttm(spec, target_type, expected_result, dttm)
+
+
+def test_epoch_to_dttm() -> None:
+    from superset.db_engine_specs.firebolt import FireboltEngineSpec
+
+    assert (
+        FireboltEngineSpec.epoch_to_dttm().format(col="timestamp_column")
+        == "from_unixtime(timestamp_column)"
+    )