import datetime

import pathlib

import pytest

from . import relpath

import oxrlib.loaders

CACHE_PATH = relpath('filecache')

CACHE_PATTERN = '{date}_{base}_cache.json'

@pytest.fixture

def dummycache():

    return oxrlib.loaders.FileCache(CACHE_PATH, CACHE_PATTERN)

@pytest.mark.parametrize('date,base', [

    (datetime.date(1999, 2, 1), 'USD'),

    (datetime.date(1999, 3, 1), 'EUR'),

])

def test_cache_success(dummycache, date, base):

    expect_name = CACHE_PATH / CACHE_PATTERN.format(date=date.isoformat(), base=base)

    with dummycache.historical(date, base) as cache_file:

        assert pathlib.Path(cache_file.name) == expect_name

@pytest.mark.parametrize('date,base', [

    (datetime.date(1999, 2, 1), 'EUR'),

    (datetime.date(1999, 3, 1), 'USD'),

])

def test_cache_not_found(dummycache, date, base):

    try:

        cache_file = dummycache.historical(date, base)

    except FileNotFoundError:

        pass

    else:

        cache_file.close()

        assert False, "cache file found when unexpected"