Allow special marker ANY inside JSON examples

spec/test/features/steps/jsonexample.py

@@ -0,0 +1,24 @@
+import json
+from functools import partial
+import re
+
+
+class ANY:
+    pass
+
+
+class ExampleDecoder(json.JSONDecoder):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, object_hook=self.object_hook, **kwargs)
+
+    def decode(self, s, *args, **kwargs):
+        s = re.sub(r'(\W)(ANY)(\W)', r'\1{"_type": "ANY"}\3', s)
+        return super().decode(s, *args, **kwargs)
+
+    def object_hook(self, dct):
+        if dct.get('_type', None) == 'ANY':
+            return ANY()
+        else:
+            return dct
+
+loads = partial(json.loads, cls=ExampleDecoder)