NPO-Accounting/oxrlib Files · tests/test_CacheWriter.py

Files @ 71893ace4dc0

Branch filter:

Location: NPO-Accounting/oxrlib/tests/test_CacheWriter.py

71893ace4dc0 1.4 KiB text/x-python Show Annotation Show as Raw Download as Raw

Brett Smith

tests: Historical tests use more flexible rate matching.

This lets the tests be more flexible about how much precision is used in
rates when appropriate, and makes them ready to parametrize for
Beancount.

import datetime
import json
import pathlib

import pytest

from . import any_date, relpath, StringIO
import oxrlib.cache
import oxrlib.errors

CACHE_PATH = relpath('writecache')
HISTORICAL_PATTERN = '{date}_{base}_cache.json'

class FakeCacheFile(oxrlib.cache.WriteCacheFile):
    def __init__(self, path, *args, **kwargs):
        self.path = path
        assert args[0].startswith('w')
        self.open_file = StringIO()
        self.open_file.name = self.path.as_posix()
        type(self).last_file = self.open_file


class FakeRate:
    def __init__(self, date, base):
        self.timestamp = datetime.datetime(date.year, date.month, date.day)
        self.base = base

    def serialize(self):
        return "test data for {} in {}".format(self.base, self.timestamp.date())


@pytest.fixture
def dummycache():
    cache = oxrlib.cache.CacheWriter(CACHE_PATH, file_class=FakeCacheFile)
    cache.setup(historical=HISTORICAL_PATTERN)
    return cache

def test_cache_success(dummycache, any_date):
    base = 'USD'
    expect_name = CACHE_PATH / HISTORICAL_PATTERN.format(date=any_date.isoformat(), base=base)
    with dummycache.historical(any_date, base) as cache_file:
        assert pathlib.Path(cache_file.name) == expect_name

def test_save_rate(dummycache, any_date):
    rate = FakeRate(any_date, 'USD')
    dummycache.save_rate(rate)
    assert FakeCacheFile.last_file.last_value == json.dumps(rate.serialize())