Implement is_symlink.

Closes #117

Author: jaraco

newsfragments/117.feature.rst

@@ -0,0 +1 @@
+Implement is_symlink.

tests/test_path.py

@@ -515,7 +515,6 @@ def test_eq_hash(self, alpharep):
         root = zipfile.Path(alpharep)
         assert root in {root}
 
-    @__import__('pytest').mark.xfail(reason="Not implemented")
     @pass_alpharep
     def test_is_symlink(self, alpharep):
         root = zipfile.Path(alpharep)

zipp/__init__.py

@@ -5,6 +5,7 @@
 import contextlib
 import pathlib
 import re
+import stat
 import sys
 
 from .compat.py310 import text_encoding
@@ -391,9 +392,11 @@ def match(self, path_pattern):
 
     def is_symlink(self):
         """
-        Return whether this path is a symlink. Always false (python/cpython#82102).
+        Return whether this path is a symlink.
         """
-        return False
+        info = self.root.getinfo(self.at)
+        mode = info.external_attr >> 16
+        return stat.S_ISLNK(mode)
 
     def glob(self, pattern):
         if not pattern: