Test: Introduce test to check genesis block hashes

Author: jtimon

test/functional/feature_genesishash.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+# Copyright (c) 2018-2018 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 genesis block hash
+"""
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+)
+
+GENESIS_ARGS_MAP = [
+    {
+        'memo': 'regtest2_style',
+        'genesis': '82ba4b06cffb29f7c5426aa519ecb8e9a2b28b1df11a65c155b5054cca67583d',
+        'args': [
+                '-con_genesis_style=regtest2_style',
+        ],
+    },
+
+    {
+        'memo': 'default_style',
+        'genesis': 'c03f16ae9e2980de2b61fd6dc84af8ac4a37bea928af632166a6b36c5c871ddd',
+        'args': [
+                '-con_genesis_style=default_style',
+        ],
+    },
+]
+
+class GenesisHashTest(BitcoinTestFramework):
+
+    def set_test_params(self):
+        self.chain = 'signet'
+        self.setup_clean_chain = True
+        self.num_nodes = len(GENESIS_ARGS_MAP)
+        self.extra_args = [item['args'] for item in GENESIS_ARGS_MAP]
+
+    def setup_network(self):
+        # Don't connect the nodes as they use incompatible chains
+        self.add_nodes(self.num_nodes, self.extra_args)
+        self.start_nodes()
+
+    def run_test(self):
+        for i in range(len(GENESIS_ARGS_MAP)):
+            self.log.info('Check genesis style %s...' % GENESIS_ARGS_MAP[i]['memo'])
+            assert_equal(self.nodes[i].getblockhash(0), GENESIS_ARGS_MAP[i]['genesis'])
+
+if __name__ == '__main__':
+    GenesisHashTest().main()

test/functional/test_runner.py

@@ -150,6 +150,7 @@
     'rpc_scantxoutset.py',
     'feature_logging.py',
     'p2p_node_network_limited.py',
+    'feature_genesishash.py',
     'feature_blocksdir.py',
     'feature_config_args.py',
     'feature_help.py',