diff -r fc0f3ed071fc -r 66c5a8cf2868 tests/test-lfs-pointer.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-lfs-pointer.py	Tue Nov 14 00:06:23 2017 -0500
@@ -0,0 +1,41 @@
+from __future__ import absolute_import, print_function
+
+import os
+import sys
+
+# make it runnable using python directly without run-tests.py
+sys.path[0:0] = [os.path.join(os.path.dirname(__file__), '..')]
+
+from hgext.lfs import pointer
+
+def tryparse(text):
+    r = {}
+    try:
+        r = pointer.deserialize(text)
+        print('ok')
+    except Exception as ex:
+        print(ex)
+    if r:
+        text2 = r.serialize()
+        if text2 != text:
+            print('reconstructed text differs')
+    return r
+
+t = ('version https://git-lfs.github.com/spec/v1\n'
+     'oid sha256:4d7a214614ab2935c943f9e0ff69d22eadbb8f32b1'
+     '258daaa5e2ca24d17e2393\n'
+     'size 12345\n'
+     'x-foo extra-information\n')
+
+tryparse('')
+tryparse(t)
+tryparse(t.replace('git-lfs', 'unknown'))
+tryparse(t.replace('v1\n', 'v1\n\n'))
+tryparse(t.replace('sha256', 'ahs256'))
+tryparse(t.replace('sha256:', ''))
+tryparse(t.replace('12345', '0x12345'))
+tryparse(t.replace('extra-information', 'extra\0information'))
+tryparse(t.replace('extra-information', 'extra\ninformation'))
+tryparse(t.replace('x-foo', 'x_foo'))
+tryparse(t.replace('oid', 'blobid'))
+tryparse(t.replace('size', 'size-bytes').replace('oid', 'object-id'))