snowflake_sqlalchemy/tests/util.py

#
# Copyright (c) 2012-2023 Snowflake Computing Inc. All rights reserved.
#

from __future__ import annotations

import random
import string
from typing import Sequence

from sqlalchemy.types import (
    BIGINT,
    BINARY,
    BOOLEAN,
    CHAR,
    DATE,
    DATETIME,
    DECIMAL,
    FLOAT,
    INTEGER,
    REAL,
    SMALLINT,
    TIME,
    TIMESTAMP,
    VARCHAR,
)

from snowflake.sqlalchemy.custom_types import (
    ARRAY,
    GEOGRAPHY,
    GEOMETRY,
    OBJECT,
    TIMESTAMP_LTZ,
    TIMESTAMP_NTZ,
    TIMESTAMP_TZ,
    VARIANT,
)

ischema_names_baseline = {
    "BIGINT": BIGINT,
    "BINARY": BINARY,
    # 'BIT': BIT,
    "BOOLEAN": BOOLEAN,
    "CHAR": CHAR,
    "CHARACTER": CHAR,
    "DATE": DATE,
    "DATETIME": DATETIME,
    "DEC": DECIMAL,
    "DECIMAL": DECIMAL,
    "DOUBLE": FLOAT,
    "FIXED": DECIMAL,
    "FLOAT": FLOAT,
    "INT": INTEGER,
    "INTEGER": INTEGER,
    "NUMBER": DECIMAL,
    # 'OBJECT': ?
    "REAL": REAL,
    "BYTEINT": SMALLINT,
    "SMALLINT": SMALLINT,
    "STRING": VARCHAR,
    "TEXT": VARCHAR,
    "TIME": TIME,
    "TIMESTAMP": TIMESTAMP,
    "TIMESTAMP_TZ": TIMESTAMP_TZ,
    "TIMESTAMP_LTZ": TIMESTAMP_LTZ,
    "TIMESTAMP_NTZ": TIMESTAMP_NTZ,
    "TINYINT": SMALLINT,
    "VARBINARY": BINARY,
    "VARCHAR": VARCHAR,
    "VARIANT": VARIANT,
    "OBJECT": OBJECT,
    "ARRAY": ARRAY,
    "GEOGRAPHY": GEOGRAPHY,
    "GEOMETRY": GEOMETRY,
}


def random_string(
    length: int,
    prefix: str = "",
    suffix: str = "",
    choices: Sequence[str] = string.ascii_lowercase,
) -> str:
    """Our convenience function to generate random string for object names.

    Args:
        length: How many random characters to choose from choices.
        prefix: Prefix to add to random string generated.
        suffix: Suffix to add to random string generated.
        choices: A generator of things to choose from.
    """
    random_part = "".join([random.choice(choices) for _ in range(length)])
    return "".join([prefix, random_part, suffix])