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Location: oxrlib-fork/tests/test_CacheWriter.py - annotation
6a416b162d8a
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cache: Add CacheWriter.save_rate method.
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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 TestCacheFile(oxrlib.cache.WriteCacheFile):
def __init__(self, path, *args, **kwargs):
self.path = path
assert args[0].startswith('w')
def open(self):
last_file = StringIO()
last_file.name = self.path.as_posix()
type(self).last_file = last_file
return self.last_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=TestCacheFile)
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 TestCacheFile.last_file.last_value == json.dumps(rate.serialize())
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