Expect path/from attributes also as JsonPoiner instances (#60)

Author: stefankoegl

jsonpatch.py

@@ -335,8 +335,14 @@ class PatchOperation(object):
     """A single operation inside a JSON Patch."""
 
     def __init__(self, operation):
-        self.location = operation['path']
-        self.pointer = JsonPointer(self.location)
+
+        if isinstance(operation['path'], JsonPointer):
+            self.location = operation['path'].path
+            self.pointer = operation['path']
+        else:
+            self.location = operation['path']
+            self.pointer = JsonPointer(self.location)
+
         self.operation = operation
 
     def apply(self, obj):
@@ -493,7 +499,10 @@ class MoveOperation(PatchOperation):
 
     def apply(self, obj):
         try:
-            from_ptr = JsonPointer(self.operation['from'])
+            if isinstance(self.operation['from'], JsonPointer):
+                from_ptr = self.operation['from']
+            else:
+                from_ptr = JsonPointer(self.operation['from'])
         except KeyError as ex:
             raise InvalidJsonPatch(
                 "The operation does not contain a 'from' member")

tests.py

@@ -594,6 +594,27 @@ def test_replace_missing(self):
         self.assertRaises(jsonpatch.JsonPatchConflict, jsonpatch.apply_patch, src, patch_obj)
 
 
+class JsonPointerTests(unittest.TestCase):
+
+    def test_create_with_pointer(self):
+
+        patch = jsonpatch.JsonPatch([
+            {'op': 'add', 'path': jsonpointer.JsonPointer('/foo'), 'value': 'bar'},
+            {'op': 'add', 'path': jsonpointer.JsonPointer('/baz'), 'value': [1, 2, 3]},
+            {'op': 'remove', 'path': jsonpointer.JsonPointer('/baz/1')},
+            {'op': 'test', 'path': jsonpointer.JsonPointer('/baz'), 'value': [1, 3]},
+            {'op': 'replace', 'path': jsonpointer.JsonPointer('/baz/0'), 'value': 42},
+            {'op': 'remove', 'path': jsonpointer.JsonPointer('/baz/1')},
+            {'op': 'move', 'from': jsonpointer.JsonPointer('/foo'), 'path': jsonpointer.JsonPointer('/bar')},
+
+        ])
+        doc = {}
+        result = patch.apply(doc)
+        expected = {'bar': 'bar', 'baz': [42]}
+        self.assertEqual(result, expected)
+
+
+
 if __name__ == '__main__':
     modules = ['jsonpatch']
 
@@ -608,6 +629,7 @@ def get_suite():
         suite.addTest(unittest.makeSuite(InvalidInputTests))
         suite.addTest(unittest.makeSuite(ConflictTests))
         suite.addTest(unittest.makeSuite(OptimizationTests))
+        suite.addTest(unittest.makeSuite(JsonPointerTests))
         return suite