[refactor] Rename test file to allow any getpeerinfo deprecations.

Simple rename/restructure to allow for upcoming test additions.

test/functional/rpc_getpeerinfo_deprecation.py

@@ -0,0 +1,26 @@
+#!/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 getpeerinfo RPC fields."""
+
+from test_framework.test_framework import BitcoinTestFramework
+
+
+class GetpeerinfoDeprecationTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 2
+        self.extra_args = [[], ["-deprecatedrpc=banscore"]]
+
+    def run_test(self):
+        self.test_banscore_deprecation()
+
+    def test_banscore_deprecation(self):
+        self.log.info("Test getpeerinfo by default no longer returns a banscore field")
+        assert "banscore" not in self.nodes[0].getpeerinfo()[0].keys()
+
+        self.log.info("Test getpeerinfo returns banscore with -deprecatedrpc=banscore")
+        assert "banscore" in self.nodes[1].getpeerinfo()[0].keys()
+
+if __name__ == "__main__":
+    GetpeerinfoDeprecationTest().main()