def test_listattr(self):
plugins = PyPlugins()
class api1:
x = 41
class api2:
x = 42
class api3:
x = 43
plugins.register(api1())
plugins.register(api2())
plugins.register(api3())
l = list(plugins.listattr('x'))
assert l == [41, 42, 43]
l = list(plugins.listattr('x', reverse=True))
assert l == [43, 42, 41]
