def test_call_each(self):
plugins = PytestPlugins()
class My:
def method(self, arg):
pass
plugins.register(My())
py.test.raises(TypeError, 'plugins.call_each("method")')
l = plugins.call_each("method", arg=42)
assert l == []
py.test.raises(TypeError, 'plugins.call_each("method", arg=42, s=13)')
