#!/usr/bin/env python3
# Copyright (c) 2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test using named arguments for RPCs."""

from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal, assert_raises_rpc_error


class NamedArgumentTest(BitcoinTestFramework):
    def set_test_params(self):
        self.num_nodes = 1

    def run_test(self):
        node = self.nodes[0]
        h = node.help(command='getblockchaininfo')
        assert(h.startswith('getblockchaininfo\n'))

        assert_raises_rpc_error(-8, 'Unknown named parameter',
                                node.help, random='getblockchaininfo')

        h = node.getblockhash(height=0)
        node.getblock(blockhash=h)

        assert_equal(node.echo(), [])
        assert_equal(node.echo(arg0=0, arg9=9), [0] + [None] * 8 + [9])
        assert_equal(node.echo(arg1=1), [None, 1])
        assert_equal(node.echo(arg9=None), [None] * 10)
        assert_equal(node.echo(arg0=0, arg3=3, arg9=9),
                     [0] + [None] * 2 + [3] + [None] * 5 + [9])


if __name__ == '__main__':
    NamedArgumentTest().main()