tests/unit_tests/db_engine_specs/test_crate.py

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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  # noqa: F401


def test_epoch_to_dttm() -> None:
    """
    DB Eng Specs (crate): Test epoch to dttm
    """
    from superset.db_engine_specs.crate import CrateEngineSpec

    assert CrateEngineSpec.epoch_to_dttm() == "{col} * 1000"


def test_epoch_ms_to_dttm() -> None:
    """
    DB Eng Specs (crate): Test epoch ms to dttm
    """
    from superset.db_engine_specs.crate import CrateEngineSpec

    assert CrateEngineSpec.epoch_ms_to_dttm() == "{col}"


def test_alter_new_orm_column() -> None:
    """
    DB Eng Specs (crate): Test alter orm column
    """
    from superset.connectors.sqla.models import SqlaTable, TableColumn
    from superset.db_engine_specs.crate import CrateEngineSpec
    from superset.models.core import Database

    database = Database(database_name="crate", sqlalchemy_uri="crate://db")
    tbl = SqlaTable(table_name="tbl", database=database)
    col = TableColumn(column_name="ts", type="TIMESTAMP", table=tbl)
    CrateEngineSpec.alter_new_orm_column(col)
    assert col.python_date_format == "epoch_ms"


@pytest.mark.parametrize(
    "target_type,expected_result",
    [
        ("TimeStamp", "CAST('2019-01-02T03:04:05.678900' AS TIMESTAMP)"),
        ("UnknownType", None),
    ],
)
def test_convert_dttm(
    target_type: str,
    expected_result: Optional[str],
    dttm: datetime,  # noqa: F811
) -> None:
    from superset.db_engine_specs.crate import CrateEngineSpec as spec  # noqa: N813

    assert_convert_dttm(spec, target_type, expected_result, dttm)