'Test the community to send a signature request message.'

def test_sign_block(self):

    (node, other) = self.create_nodes(2)
    target_other = self._create_target(node, other)
    node.call(node.community.sign_block, target_other, other.my_member.public_key, {'id': 42})
    (_, message) = other.receive_message(names=[HALF_BLOCK]).next()
    self.assertTrue(message)
