add json parse to test

Author: d-w-moore

irods/test/rule_test.py

@@ -1,6 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 
+import json
 import os
 import sys
 import random
@@ -459,8 +460,9 @@ def test_rule_exec_context(self):
             l = list(self.sess.query(RuleExec).filter(Like(RuleExec.name,f'%"{random_int}"%')))
             rule_id = l[0][RuleExec.id]
 
-            # Assert context exists, is of string type, and is not empty.
-            self.assertGreater(l[0][RuleExec.context], "")
+            # Assert context exists, and is JSON-parsable with a non-null-length result.
+            rule_context = l[0][RuleExec.context]
+            self.assertGreater(len(json.loads(rule_context)), 0)
         finally:
             # Remove the delayed rule from the queue.
             if rule_id >= 0: