def test_cache(self):
"""Ensure that _FactoryWrapper tries to import only once."""
orig_date = datetime.date
w = declarations._FactoryWrapper('datetime.date')
self.assertEqual(None, w.factory)
factory_class = w.get()
self.assertEqual(orig_date, factory_class)
try:
# Modify original value
datetime.date = None
# Repeat import
factory_class = w.get()
self.assertEqual(orig_date, factory_class)
finally:
# IMPORTANT: restore attribute.
datetime.date = orig_date
def test_cache(self):
"""Ensure that _FactoryWrapper tries to import only once."""
orig_date = datetime.date
w = declarations._FactoryWrapper('datetime.date')
self.assertEqual(None, w.factory)
factory_class = w.get()
self.assertEqual(orig_date, factory_class)
try:
# Modify original value
datetime.date = None
# Repeat import
factory_class = w.get()
self.assertEqual(orig_date, factory_class)
finally:
# IMPORTANT: restore attribute.
datetime.date = orig_date
def test_lazyness(self):
f = declarations._FactoryWrapper('factory.declarations.Sequence')
self.assertEqual(None, f.factory)
factory_class = f.get()
self.assertEqual(declarations.Sequence, factory_class)
def test_path(self):
w = declarations._FactoryWrapper('datetime.date')
self.assertEqual(datetime.date, w.get())
def test_class(self):
w = declarations._FactoryWrapper(datetime.date)
self.assertEqual(datetime.date, w.get())
def test_invalid_path(self):
with self.assertRaises(ValueError):
declarations._FactoryWrapper('UnqualifiedSymbol')
with self.assertRaises(ValueError):
declarations._FactoryWrapper(42)
def test_lazyness(self):
f = declarations._FactoryWrapper('factory.declarations.Sequence')
self.assertEqual(None, f.factory)
factory_class = f.get()
self.assertEqual(declarations.Sequence, factory_class)
def test_path(self):
w = declarations._FactoryWrapper('datetime.date')
self.assertEqual(datetime.date, w.get())
def test_class(self):
w = declarations._FactoryWrapper(datetime.date)
self.assertEqual(datetime.date, w.get())