tests/unit_tests/db_engine_specs/test_postgres.py

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from datetime import datetime
from typing import Any, Optional

import pytest
from sqlalchemy import types
from sqlalchemy.dialects.postgresql import DOUBLE_PRECISION, ENUM, JSON
from sqlalchemy.engine.url import make_url

from superset.utils.core import GenericDataType
from tests.unit_tests.db_engine_specs.utils import (
    assert_column_spec,
    assert_convert_dttm,
)
from tests.unit_tests.fixtures.common import dttm


@pytest.mark.parametrize(
    "target_type,expected_result",
    [
        ("Date", "TO_DATE('2019-01-02', 'YYYY-MM-DD')"),
        (
            "DateTime",
            "TO_TIMESTAMP('2019-01-02 03:04:05.678900', 'YYYY-MM-DD HH24:MI:SS.US')",
        ),
        (
            "TimeStamp",
            "TO_TIMESTAMP('2019-01-02 03:04:05.678900', 'YYYY-MM-DD HH24:MI:SS.US')",
        ),
        ("UnknownType", None),
    ],
)
def test_convert_dttm(
    target_type: str, expected_result: Optional[str], dttm: datetime
) -> None:
    from superset.db_engine_specs.postgres import PostgresEngineSpec as spec

    assert_convert_dttm(spec, target_type, expected_result, dttm)


@pytest.mark.parametrize(
    "native_type,sqla_type,attrs,generic_type,is_dttm",
    [
        ("SMALLINT", types.SmallInteger, None, GenericDataType.NUMERIC, False),
        ("INTEGER", types.Integer, None, GenericDataType.NUMERIC, False),
        ("BIGINT", types.BigInteger, None, GenericDataType.NUMERIC, False),
        ("DECIMAL", types.Numeric, None, GenericDataType.NUMERIC, False),
        ("NUMERIC", types.Numeric, None, GenericDataType.NUMERIC, False),
        ("REAL", types.REAL, None, GenericDataType.NUMERIC, False),
        ("DOUBLE PRECISION", DOUBLE_PRECISION, None, GenericDataType.NUMERIC, False),
        ("MONEY", types.Numeric, None, GenericDataType.NUMERIC, False),
        # String
        ("CHAR", types.String, None, GenericDataType.STRING, False),
        ("VARCHAR", types.String, None, GenericDataType.STRING, False),
        ("TEXT", types.String, None, GenericDataType.STRING, False),
        ("ARRAY", types.String, None, GenericDataType.STRING, False),
        ("ENUM", ENUM, None, GenericDataType.STRING, False),
        ("JSON", JSON, None, GenericDataType.STRING, False),
        # Temporal
        ("DATE", types.Date, None, GenericDataType.TEMPORAL, True),
        ("TIMESTAMP", types.TIMESTAMP, None, GenericDataType.TEMPORAL, True),
        ("TIME", types.Time, None, GenericDataType.TEMPORAL, True),
        # Boolean
        ("BOOLEAN", types.Boolean, None, GenericDataType.BOOLEAN, False),
    ],
)
def test_get_column_spec(
    native_type: str,
    sqla_type: type[types.TypeEngine],
    attrs: Optional[dict[str, Any]],
    generic_type: GenericDataType,
    is_dttm: bool,
) -> None:
    from superset.db_engine_specs.postgres import PostgresEngineSpec as spec

    assert_column_spec(spec, native_type, sqla_type, attrs, generic_type, is_dttm)


def test_get_schema_from_engine_params() -> None:
    """
    Test the ``get_schema_from_engine_params`` method.
    """
    from superset.db_engine_specs.postgres import PostgresEngineSpec

    assert (
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"), {}
        )
        is None
    )

    assert (
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"),
            {"options": "-csearch_path=secret"},
        )
        == "secret"
    )

    assert (
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"),
            {"options": "-c search_path = secret -cfoo=bar -c debug"},
        )
        == "secret"
    )

    with pytest.raises(Exception) as excinfo:
        PostgresEngineSpec.get_schema_from_engine_params(
            make_url("postgresql://user:password@host/db1"),
            {"options": "-csearch_path=secret,public"},
        )
    assert str(excinfo.value) == (
        "Multiple schemas are configured in the search path, which means "
        "Superset is unable to determine the schema of unqualified table "
        "names and enforce permissions."
    )


def test_adjust_engine_params() -> None:
    """
    Test the ``adjust_engine_params`` method.
    """
    from superset.db_engine_specs.postgres import PostgresEngineSpec

    uri = make_url("postgres://user:password@host/catalog")

    assert PostgresEngineSpec.adjust_engine_params(uri, {}, None, "secret") == (
        uri,
        {"options": "-csearch_path=secret"},
    )

    assert PostgresEngineSpec.adjust_engine_params(
        uri,
        {"foo": "bar", "options": "-csearch_path=default -c debug=1"},
        None,
        "secret",
    ) == (
        uri,
        {"foo": "bar", "options": "-csearch_path=secret -cdebug=1"},
    )