Support setting - for arrays

2 files changed, 16 insertions, 1 deletions

diff --git a/jsonpointer.py b/jsonpointer.py
index 53191ef..d353632 100644
--- a/jsonpointer.py
+++ b/jsonpointer.py
@@ -225,7 +225,11 @@ class JsonPointer(object):
 
         (parent, part) = self.to_last(doc)
 
-        parent[part] = value
+        if isinstance(parent, Sequence) and part == '-':
+            parent.append(value)
+        else:
+            parent[part] = value
+
         return doc
 
     @classmethod
diff --git a/tests.py b/tests.py
index 409990e..4fefd9f 100755
--- a/tests.py
+++ b/tests.py
@@ -193,6 +193,12 @@ class SetTests(unittest.TestCase):
         newdoc = set_pointer(doc, "/foo/1", "cod", inplace=False)
         self.assertEqual(resolve_pointer(newdoc, "/foo/1"), "cod")
 
+        self.assertEqual(len(doc["foo"]), 2)
+        newdoc = set_pointer(doc, "/foo/-", "xyz", inplace=False)
+        self.assertEqual(resolve_pointer(newdoc, "/foo/2"), "xyz")
+        self.assertEqual(len(doc["foo"]), 2)
+        self.assertEqual(len(newdoc["foo"]), 3)
+
         newdoc = set_pointer(doc, "/", 9, inplace=False)
         self.assertEqual(resolve_pointer(newdoc, "/"), 9)
 
@@ -209,6 +215,11 @@ class SetTests(unittest.TestCase):
         set_pointer(doc, "/foo/1", "cod")
         self.assertEqual(resolve_pointer(doc, "/foo/1"), "cod")
 
+        self.assertEqual(len(doc["foo"]), 2)
+        set_pointer(doc, "/foo/-", "xyz")
+        self.assertEqual(resolve_pointer(doc, "/foo/2"), "xyz")
+        self.assertEqual(len(doc["foo"]), 3)
+
         set_pointer(doc, "/", 9)
         self.assertEqual(resolve_pointer(doc, "/"), 9)