def test_provides_with_no_interface_check(self):
class Test(HasTraits):
# Deliberately _not_ implementing get_foo. This class
# should not pass an IFoo interface check.
pass
provides_ifoo = provides(IFoo)
with self.set_check_interfaces(0):
# Simulate application of the decorator
Test = provides_ifoo(Test)
test = Test()
self.assertIsInstance(test, IFoo)
def test_provides_with_interface_check_error(self):
class Test(HasTraits):
# Deliberately _not_ implementing get_foo. This class
# should not pass an IFoo interface check.
pass
provides_ifoo = provides(IFoo)
with self.set_check_interfaces(2):
with self.assertWarns(DeprecationWarning) as warnings_cm:
with self.assertRaises(InterfaceError):
# Simulate application of the decorator
Test = provides_ifoo(Test)
test = Test()
self.assertIsInstance(test, IFoo)
self.assertIn(
"the @provides decorator will not perform interface checks",
str(warnings_cm.warning),
)
# Check we used the appropriate stacklevel.
_, _, this_module = __name__.rpartition(".")
self.assertIn(this_module, warnings_cm.filename)