"""Common test configuration for handlers."""
import itertools

import pytest

from analytics.models.streams import Store


_ALL_STORES = (Store.APPLE_MUSIC, Store.SPOTIFY, Store.AMAZON_MUSIC)


@pytest.fixture(name='all_stores')
def get_all_stores():
    """Return list of all existing stores."""
    return list(_ALL_STORES)


@pytest.fixture(name='valid_stores', params=list(itertools.chain(
    *(itertools.combinations(_ALL_STORES, i)
        for i in range(len(_ALL_STORES) + 1)))))
def get_valid_stores(request):
    """Create all combinations of valid stores, including the empty one."""
    return list(request.param)