1 files changed, 63 insertions, 0 deletions
diff --git a/test/functional/forknotify.py b/test/functional/forknotify.py
new file mode 100755
index 0000000000..c2724ba5df
--- /dev/null
+++ b/test/functional/forknotify.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+# Copyright (c) 2014-2016 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 the -alertnotify option."""
+
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import *
+
+class ForkNotifyTest(BitcoinTestFramework):
+
+    def __init__(self):
+        super().__init__()
+        self.num_nodes = 2
+        self.setup_clean_chain = False
+
+    alert_filename = None  # Set by setup_network
+
+    def setup_network(self):
+        self.nodes = []
+        self.alert_filename = os.path.join(self.options.tmpdir, "alert.txt")
+        with open(self.alert_filename, 'w', encoding='utf8'):
+            pass  # Just open then close to create zero-length file
+        self.nodes.append(start_node(0, self.options.tmpdir,
+                            ["-blockversion=2", "-alertnotify=echo %s >> \"" + self.alert_filename + "\""]))
+        # Node1 mines block.version=211 blocks
+        self.nodes.append(start_node(1, self.options.tmpdir,
+                                ["-blockversion=211"]))
+        connect_nodes(self.nodes[1], 0)
+
+        self.is_network_split = False
+        self.sync_all()
+
+    def run_test(self):
+        # Mine 51 up-version blocks
+        self.nodes[1].generate(51)
+        self.sync_all()
+        # -alertnotify should trigger on the 51'st,
+        # but mine and sync another to give
+        # -alertnotify time to write
+        self.nodes[1].generate(1)
+        self.sync_all()
+
+        with open(self.alert_filename, 'r', encoding='utf8') as f:
+            alert_text = f.read()
+
+        if len(alert_text) == 0:
+            raise AssertionError("-alertnotify did not warn of up-version blocks")
+
+        # Mine more up-version blocks, should not get more alerts:
+        self.nodes[1].generate(1)
+        self.sync_all()
+        self.nodes[1].generate(1)
+        self.sync_all()
+
+        with open(self.alert_filename, 'r', encoding='utf8') as f:
+            alert_text2 = f.read()
+
+        if alert_text != alert_text2:
+            raise AssertionError("-alertnotify excessive warning of up-version blocks")
+
+if __name__ == '__main__':
+    ForkNotifyTest().main()