update "test" behaviour according to latest spec

README

@@ -3,7 +3,7 @@ python-json-patch: Applying JSON Patches
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Library to apply JSON Patches according to
-http://tools.ietf.org/html/draft-ietf-appsawg-json-patch-03
+http://tools.ietf.org/html/draft-ietf-appsawg-json-patch-04
 
 See Sourcecode for Examples
 

jsonpatch.py

@@ -31,7 +31,7 @@
 #
 
 """Apply JSON-Patches according to
-http://tools.ietf.org/html/draft-ietf-appsawg-json-patch-03"""
+http://tools.ietf.org/html/draft-ietf-appsawg-json-patch-04"""
 
 # Will be parsed by setup.py to determine package metadata
 __author__ = 'Stefan Kögl <stefan@skoegl.net>'
@@ -63,6 +63,9 @@ class JsonPatchConflict(JsonPatchException):
     - etc.
     """
 
+class JsonPatchTestFailed(JsonPatchException, AssertionError):
+    """ A Test operation failed """
+
 
 def apply_patch(doc, patch, in_place=False):
     """Apply list of patches to specified json document.
@@ -412,9 +415,17 @@ class TestOperation(PatchOperation):
     """Test value by specified location."""
 
     def apply(self, obj):
-        value = self.operation['value']
+        try:
             subobj, part = self.locate(obj, self.location)
-        assert subobj[part] == value
+        except JsonPatchConflict, c:
+            raise JsonPatchTestFailed(str(c))
+
+        val = subobj[part]
+
+        if 'value' in self.operation:
+            value = self.operation['value']
+            if val != value:
+                raise JsonPatchTestFailed('%s is not equal to tested value %s' % (val, value))
 
 
 class CopyOperation(PatchOperation):

tests.py

@@ -105,11 +105,39 @@ class ApplyPatchTestCase(unittest.TestCase):
 
     def test_test_error(self):
         obj =  {'bar': 'qux'}
-        self.assertRaises(AssertionError,
+        self.assertRaises(jsonpatch.JsonPatchTestFailed,
                           jsonpatch.apply_patch,
                           obj, [{'test': '/bar', 'value': 'bar'}])
 
 
+    def test_test_not_existing(self):
+        obj =  {'bar': 'qux'}
+        self.assertRaises(jsonpatch.JsonPatchTestFailed,
+                          jsonpatch.apply_patch,
+                          obj, [{'test': '/baz', 'value': 'bar'}])
+
+
+    def test_test_noval_existing(self):
+        obj =  {'bar': 'qux'}
+        jsonpatch.apply_patch(obj, [{'test': '/bar'}])
+
+
+    def test_test_noval_not_existing(self):
+        obj =  {'bar': 'qux'}
+        self.assertRaises(jsonpatch.JsonPatchTestFailed,
+                          jsonpatch.apply_patch,
+                          obj, [{'test': '/baz'}])
+
+
+    def test_test_noval_not_existing_nested(self):
+        obj =  {'bar': {'qux': 2}}
+        self.assertRaises(jsonpatch.JsonPatchTestFailed,
+                          jsonpatch.apply_patch,
+                          obj, [{'test': '/baz/qx'}])
+
+
+
+
 class MakePatchTestCase(unittest.TestCase):
 
     def test_apply_patch_to_copy(self):