Perform actual symlink detection; alternate approach to answer Pull Request #53.

--HG--
extra : rebase_source : a70141cd6472cd8e4024be4037bfd89e4adcb396

1 files changed, 15 insertions, 1 deletions

diff --git a/setuptools/tests/test_find_packages.py b/setuptools/tests/test_find_packages.py
index 92f7aff7..fe390728 100644
--- a/setuptools/tests/test_find_packages.py
+++ b/setuptools/tests/test_find_packages.py
@@ -12,12 +12,26 @@ from setuptools.tests.py26compat import skipIf
 
 find_420_packages = setuptools.PEP420PackageFinder.find
 
+# modeled after CPython's test.support.can_symlink
+def can_symlink():
+    TESTFN = tempfile.mktemp()
+    symlink_path = TESTFN + "can_symlink"
+    try:
+        os.symlink(TESTFN, symlink_path)
+        can = True
+    except (OSError, NotImplementedError, AttributeError):
+        can = False
+    else:
+        os.remove(symlink_path)
+    globals().update(can_symlink=lambda: can)
+    return can
+
 def has_symlink():
     bad_symlink = (
         # Windows symlink directory detection is broken on Python 3.2
         platform.system() == 'Windows' and sys.version_info[:2] == (3,2)
     )
-    return hasattr(os, 'symlink') and not bad_symlink
+    return can_symlink() and not bad_symlink
 
 class TestFindPackages(unittest.TestCase):