clean up test

Author: kumaraditya303

Lib/test/test_json/test_dump.py

@@ -66,10 +66,6 @@ def __lt__(self, o):
         self.assertEqual(self.dumps(d, sort_keys=True), '{"1337": "true.dat"}')
 
     def test_mutate_items_during_encode(self):
-        c_make_encoder = getattr(self.json.encoder, 'c_make_encoder', None)
-        if c_make_encoder is None:
-            self.skipTest("c_make_encoder not available")
-
         cache = []
 
         class BadDict(dict):
@@ -84,20 +80,9 @@ def items(self):
         def encode_str(obj):
             if cache:
                 cache.pop().clear()
-            return '"x"'
-
-        encoder = c_make_encoder(
-            None, lambda o: "null",
-            encode_str, None,
-            ": ", ", ", False,
-            False, True
-        )
-
-        try:
-            encoder(BadDict(), 0)
-        except (ValueError, RuntimeError):
-            pass
+            return 'x'
 
+        self.assertEqual(self.dumps(BadDict(), default=encode_str), '{"boom": "x"}')
 
 class TestPyDump(TestDump, PyTest): pass