test: explicitly check boolean verbosity is disallowed

Author: tdb3

test/functional/rpc_orphans.py

@@ -141,6 +141,8 @@ def orphan_details_match(self, orphan, tx, verbosity):
 
     def test_misc(self):
         node = self.nodes[0]
+        assert_raises_rpc_error(-3, "Verbosity was boolean but only integer allowed", node.getorphantxs, verbosity=True)
+        assert_raises_rpc_error(-3, "Verbosity was boolean but only integer allowed", node.getorphantxs, verbosity=False)
         help_output = node.help()
         self.log.info("Check that getorphantxs is a hidden RPC")
         assert "getorphantxs" not in help_output