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from __future__ import division, absolute_import, print_function, unicode_literals

import pytest

from tornado.options import options

from storage import get_storage_cls, StorageError
from storage.backends.memory import MPinStorage as MemoryStorage
from storage.backends.redis import MPinStorage as RedisStorage
from storage.backends.file import MPinStorage as FileStorage


def test_defauld(io_loop):
    storage = get_storage_cls()(io_loop, 'key')
    assert isinstance(storage, MemoryStorage)


def test_memory_defauld(io_loop):
    options.storage = 'memory'
    storage = get_storage_cls()(io_loop, 'key')
    assert isinstance(storage, MemoryStorage)


def test_redis_defauld(io_loop):
    options.storage = 'redis'
    storage = get_storage_cls()(io_loop, 'key')
    assert isinstance(storage, RedisStorage)


def test_file_defauld(io_loop):
    options.storage = 'json'
    options.fileStorageLocation = None
    with pytest.raises(StorageError):
        storage = get_storage_cls()(io_loop, 'key')

    options.fileStorageLocation = 'file.json'
    storage = get_storage_cls()(io_loop, 'key')
    assert isinstance(storage, FileStorage)


def test_invalid_defauld(io_loop):
    options.storage = 'invalid'
    with pytest.raises(SystemExit):
        get_storage_cls()(io_loop, 'key')