def test_fetch_cached_price__historical(self):
tmpdir = tempfile.mkdtemp()
tmpfile = path.join(tmpdir, 'prices.cache')
try:
price.setup_cache(tmpfile, False)
srcprice = SourcePrice(
Decimal('1.723'), datetime.datetime.now(tz.tzutc()), 'USD')
source = mock.MagicMock()
source.get_historical_price.return_value = srcprice
source.__file__ = '<module>'
# Cache miss.
day = datetime.date(2006, 1, 2)
result = price.fetch_cached_price(source, 'HOOL', day)
self.assertTrue(source.get_historical_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice, result)
source.get_historical_price.reset_mock()
# Cache hit.
result = price.fetch_cached_price(source, 'HOOL', day)
self.assertFalse(source.get_historical_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice, result)
finally:
price.reset_cache()
if path.exists(tmpdir):
shutil.rmtree(tmpdir)
def test_clear_cache_not_present(self):
with mock.patch('os.remove') as mock_remove:
with tempfile.TemporaryDirectory() as tmpdir:
filename = path.join(tmpdir, 'cache.db')
price.setup_cache(filename, True)
self.assertEqual(0, mock_remove.call_count)
self.assertTrue(any(dirfile.startswith('cache.db')
for dirfile in os.listdir(tmpdir)))
price.reset_cache()
def test_clear_cache_present(self):
mock_remove = mock.MagicMock()
real_remove = os.remove
def remove(*args):
mock_remove(*args)
real_remove(*args)
with mock.patch('os.remove', remove):
with tempfile.TemporaryDirectory() as tmpdir:
filename = path.join(tmpdir, 'cache.db')
with open(filename, 'w'): pass
price.setup_cache(filename, True)
self.assertEqual(1, mock_remove.call_count)
self.assertTrue(any(dirfile.startswith('cache.db')
for dirfile in os.listdir(tmpdir)))
price.reset_cache()
def test_fetch_cached_price__clear_cache(self):
tmpdir = tempfile.mkdtemp()
tmpfile = path.join(tmpdir, 'prices.cache')
try:
price.setup_cache(tmpfile, False)
srcprice = SourcePrice(Decimal('1.723'), datetime.datetime.now(tz.tzutc()),
'USD')
source = mock.MagicMock()
source.get_latest_price.return_value = srcprice
source.__file__ = '<module>'
# Cache miss.
result = price.fetch_cached_price(source, 'HOOL', None)
self.assertTrue(source.get_latest_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice, result)
source.get_latest_price.reset_mock()
# Cache hit.
result = price.fetch_cached_price(source, 'HOOL', None)
self.assertFalse(source.get_latest_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice, result)
srcprice2 = SourcePrice(
Decimal('1.894'), datetime.datetime.now(tz.tzutc()), 'USD')
source.get_latest_price.reset_mock()
source.get_latest_price.return_value = srcprice2
# Open cache again, but clear it.
price.reset_cache()
price.setup_cache(tmpfile, True)
# Cache cleared.
result = price.fetch_cached_price(source, 'HOOL', None)
self.assertTrue(source.get_latest_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice2, result)
finally:
price.reset_cache()
if path.exists(tmpdir):
shutil.rmtree(tmpdir)
def test_fetch_cached_price__latest(self):
tmpdir = tempfile.mkdtemp()
tmpfile = path.join(tmpdir, 'prices.cache')
try:
price.setup_cache(tmpfile, False)
srcprice = SourcePrice(Decimal('1.723'), datetime.datetime.now(tz.tzutc()),
'USD')
source = mock.MagicMock()
source.get_latest_price.return_value = srcprice
source.__file__ = '<module>'
# Cache miss.
result = price.fetch_cached_price(source, 'HOOL', None)
self.assertTrue(source.get_latest_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice, result)
source.get_latest_price.reset_mock()
# Cache hit.
result = price.fetch_cached_price(source, 'HOOL', None)
self.assertFalse(source.get_latest_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice, result)
srcprice2 = SourcePrice(
Decimal('1.894'), datetime.datetime.now(tz.tzutc()), 'USD')
source.get_latest_price.reset_mock()
source.get_latest_price.return_value = srcprice2
# Cache expired.
time_beyond = datetime.datetime.now() + price._CACHE.expiration * 2
with mock.patch('beanprice.price.now', return_value=time_beyond):
result = price.fetch_cached_price(source, 'HOOL', None)
self.assertTrue(source.get_latest_price.called)
self.assertEqual(1, len(price._CACHE))
self.assertEqual(srcprice2, result)
finally:
price.reset_cache()
if path.exists(tmpdir):
shutil.rmtree(tmpdir)