Make test.test_args a non-data property per Pull Request #155.

2 files changed, 14 insertions, 1 deletions

diff --git a/CHANGES.txt b/CHANGES.txt
index 73855d1c..f399636f 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -10,6 +10,8 @@ CHANGES
 * Update dependency on certify.
 * Pull Request #160: Improve detection of gui script in
   ``easy_install._adjust_header``.
+* Made ``test.test_args`` a non-data property; alternate fix
+  for the issue reported in Pull Request #155.
 
 ------
 18.6.1
diff --git a/setuptools/command/test.py b/setuptools/command/test.py
index 160e21c9..c26f5fc9 100644
--- a/setuptools/command/test.py
+++ b/setuptools/command/test.py
@@ -41,6 +41,17 @@ class ScanningLoader(TestLoader):
             return tests[0]  # don't create a nested suite for only one return
 
 
+# adapted from jaraco.classes.properties:NonDataProperty
+class NonDataProperty(object):
+    def __init__(self, fget):
+        self.fget = fget
+
+    def __get__(self, obj, objtype=None):
+        if obj is None:
+            return self
+        return self.fget(obj)
+
+
 class test(Command):
     """Command to run unit tests after in-place build"""
 
@@ -78,7 +89,7 @@ class test(Command):
         if self.test_runner is None:
             self.test_runner = getattr(self.distribution, 'test_runner', None)
 
-    @property
+    @NonDataProperty
     def test_args(self):
         return list(self._test_args())