encoding: Fix Name.to_str

Author: zjkmxy

CHANGELOG.rst

@@ -9,8 +9,9 @@ Master -- (latest)
 * Improve NDNApp.route and NDNApp.express_interest to give access the
   original packet and signature pointers of packets.
 * Fix typos in the documentation.
-* Support more alternate URI format of Name Component (seg, off, v, t and seq)
+* Support more alternate URI format of Name Component (``seg``, ``off``, ``v``, ``t`` and ``seq``)
 * Update Python version to 3.8 and add PyPy 7.2.0 in GitHub Action.
+* Fix Name.to_str so its output for ``[b'\x08\x00']`` is correct.
 
 0.2b1 (2019-11-20)
 ++++++++++++++++++

src/ndn/encoding/name/Name.py

@@ -81,7 +81,10 @@ def to_str(name: NonStrictName) -> str:
         '/%CE%A3%CF%80%CF%85%CF%81%CE%AF%CE%B4%CF%89%CE%BD'
     """
     name = normalize(name)
-    return '/' + '/'.join(Component.to_str(comp) for comp in name)
+    ret = '/' + '/'.join(Component.to_str(comp) for comp in name)
+    if name and name[-1] == b'\x08\x00':
+        ret += '/'
+    return ret
 
 
 def from_bytes(buf: BinaryStr) -> FormalName:

tests/encoding/name_test.py

@@ -199,6 +199,7 @@ def test_string_parse():
         assert Name.to_str(Name.from_str('/hello//world')) == '/hello//world'
         assert Name.to_str(Name.from_str('/hello/./world')) == '/hello/./world'
         assert Name.to_str(Name.from_str('/hello/../world')) == '/hello/../world'
+        assert Name.to_str(Name.from_str('//')) == '//'
 
     @staticmethod
     def test_compare():