test: Check wallet name in -walletnotify script

Author: promag

test/functional/feature_notifications.py

@@ -13,13 +13,24 @@
     connect_nodes,
 )
 
+# Linux allow all characters other than \x00
+# Windows disallow control characters (0-31) and /\?%:|"<>
+FILE_CHAR_START = 32 if os.name == 'nt' else 1
+FILE_CHAR_END = 128
+FILE_CHAR_BLACKLIST = '/\\?%*:|"<>' if os.name == 'nt' else '/'
+
+
+def notify_outputname(walletname, txid):
+    return txid if os.name == 'nt' else '{}_{}'.format(walletname, txid)
+
 
 class NotificationsTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 2
         self.setup_clean_chain = True
 
     def setup_network(self):
+        self.wallet = ''.join(chr(i) for i in range(FILE_CHAR_START, FILE_CHAR_END) if chr(i) not in FILE_CHAR_BLACKLIST)
         self.alertnotify_dir = os.path.join(self.options.tmpdir, "alertnotify")
         self.blocknotify_dir = os.path.join(self.options.tmpdir, "blocknotify")
         self.walletnotify_dir = os.path.join(self.options.tmpdir, "walletnotify")
@@ -33,7 +44,8 @@ def setup_network(self):
                             "-blocknotify=echo > {}".format(os.path.join(self.blocknotify_dir, '%s'))],
                            ["-blockversion=211",
                             "-rescan",
-                            "-walletnotify=echo > {}".format(os.path.join(self.walletnotify_dir, '%s'))]]
+                            "-wallet={}".format(self.wallet),
+                            "-walletnotify=echo > {}".format(os.path.join(self.walletnotify_dir, notify_outputname('%w', '%s')))]]
         super().setup_network()
 
     def run_test(self):
@@ -53,7 +65,7 @@ def run_test(self):
             wait_until(lambda: len(os.listdir(self.walletnotify_dir)) == block_count, timeout=10)
 
             # directory content should equal the generated transaction hashes
-            txids_rpc = list(map(lambda t: t['txid'], self.nodes[1].listtransactions("*", block_count)))
+            txids_rpc = list(map(lambda t: notify_outputname(self.wallet, t['txid']), self.nodes[1].listtransactions("*", block_count)))
             assert_equal(sorted(txids_rpc), sorted(os.listdir(self.walletnotify_dir)))
             self.stop_node(1)
             for tx_file in os.listdir(self.walletnotify_dir):
@@ -67,7 +79,7 @@ def run_test(self):
             wait_until(lambda: len(os.listdir(self.walletnotify_dir)) == block_count, timeout=10)
 
             # directory content should equal the generated transaction hashes
-            txids_rpc = list(map(lambda t: t['txid'], self.nodes[1].listtransactions("*", block_count)))
+            txids_rpc = list(map(lambda t: notify_outputname(self.wallet, t['txid']), self.nodes[1].listtransactions("*", block_count)))
             assert_equal(sorted(txids_rpc), sorted(os.listdir(self.walletnotify_dir)))
 
         # TODO: add test for `-alertnotify` large fork notifications