[tests] Add wallet_balance.py #14845

   0 | @@ -0,0 +1,133 @@
   1 | +#!/usr/bin/env python3
   2 | +# Copyright (c) 2014-2018 The Bitcoin Core developers

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  73 | +        self.nodes[1].sendrawtransaction(txs[0]['hex'])  # sending on both nodes is faster than waiting for propogation
  74 | +
  75 | +        self.sync_all()
  76 | +        txs = self.create_transactions(self.nodes[1], self.nodes[0].getnewaddress(), 60, [Decimal('0.01'), Decimal('0.02')])
  77 | +        self.nodes[1].sendrawtransaction(txs[0]['hex'])
  78 | +        self.nodes[0].sendrawtransaction(txs[0]['hex'])  # sending on both nodes is faster than waiting for propogation

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  68 | +        assert_equal(self.nodes[0].getbalance(minconf=1), 50)
  69 | +
  70 | +        # Send 40 BTC from 0 to 1 and 60 BTC from 1 to 0.
  71 | +        txs = self.create_transactions(self.nodes[0], self.nodes[1].getnewaddress(), 40, [Decimal('0.01')])
  72 | +        self.nodes[0].sendrawtransaction(txs[0]['hex'])
  73 | +        self.nodes[1].sendrawtransaction(txs[0]['hex'])  # sending on both nodes is faster than waiting for propogation

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  19 | +        self.setup_clean_chain = True
  20 | +
  21 | +    def skip_test_if_missing_module(self):
  22 | +        self.skip_if_no_wallet()
  23 | +
  24 | +    def create_transactions(self, node, address, amt, fees):

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