Method wait_for_new_peer

test/functional/test_framework/test_node.py:647–661

Wait until the node is connected to at least one new peer. We detect this by watching for an increased highest peer id, using the `getpeerinfo` RPC call. Note that the simpler approach of only accounting for the number of peers suffers from race conditions, as discon

(self, timeout=5)

    @contextlib.contextmanager
    def wait_for_new_peer(self, timeout=5):
        """
        Wait until the node is connected to at least one new peer. We detect this
        by watching for an increased highest peer id, using the `getpeerinfo` RPC call.
        Note that the simpler approach of only accounting for the number of peers
        suffers from race conditions, as disconnects from unrelated previous peers
        could happen anytime in-between.
        """
        def get_highest_peer_id():
            peer_info = self.getpeerinfo()
            return peer_info[-1]["id"] if peer_info else -1

        initial_peer_id = get_highest_peer_id()
        yield
        self.wait_until(lambda: get_highest_peer_id() > initial_peer_id, timeout=timeout)

    def assert_start_raises_init_error(self, extra_args=None, expected_msg=None, match=ErrorMatch.FULL_TEXT, *args, **kwargs):
        """Attempt to start the node and expect it to raise an error.