test: Wallet methods are disabled when no wallet is loaded

test/functional/wallet_multiwallet.py

@@ -254,6 +254,7 @@ class MultiWalletTest(BitcoinTestFramework):
         for wallet_name in self.nodes[0].listwallets():
             self.nodes[0].unloadwallet(wallet_name)
         assert_equal(self.nodes[0].listwallets(), [])
+        assert_raises_rpc_error(-32601, "Method not found (wallet method is disabled because no wallet is loaded)", self.nodes[0].getwalletinfo)
 
 if __name__ == '__main__':
     MultiWalletTest().main()