test: getaddressinfo label deprecation test

test/functional/rpc_getaddressinfo_label_deprecation.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+# Copyright (c) 2020 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 deprecation of the RPC getaddressinfo `label` field. It has been
+superceded by the `labels` field.
+
+"""
+from test_framework.test_framework import BitcoinTestFramework
+
+class GetAddressInfoLabelDeprecationTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 2
+        self.setup_clean_chain = False
+        # Start node[0] with -deprecatedrpc=label, and node[1] without.
+        self.extra_args = [["-deprecatedrpc=label"], []]
+
+    def skip_test_if_missing_module(self):
+        self.skip_if_no_wallet()
+
+    def test_label_with_deprecatedrpc_flag(self):
+        self.log.info("Test getaddressinfo label with -deprecatedrpc flag")
+        node = self.nodes[0]
+        address = node.getnewaddress()
+        info = node.getaddressinfo(address)
+        assert "label" in info
+
+    def test_label_without_deprecatedrpc_flag(self):
+        self.log.info("Test getaddressinfo label without -deprecatedrpc flag")
+        node = self.nodes[1]
+        address = node.getnewaddress()
+        info = node.getaddressinfo(address)
+        assert "label" not in info
+
+    def run_test(self):
+        """Test getaddressinfo label with and without -deprecatedrpc flag."""
+        self.test_label_with_deprecatedrpc_flag()
+        self.test_label_without_deprecatedrpc_flag()
+
+
+if __name__ == '__main__':
+    GetAddressInfoLabelDeprecationTest().main()

test/functional/test_runner.py

@@ -213,6 +213,7 @@ BASE_SCRIPTS = [
     'feature_blocksdir.py',
     'feature_config_args.py',
     'rpc_getaddressinfo_labels_purpose_deprecation.py',
+    'rpc_getaddressinfo_label_deprecation.py',
     'rpc_help.py',
     'feature_help.py',
     'feature_shutdown.py',