1 files changed, 34 insertions, 0 deletions
diff --git a/lib/greenlet/tests/test_weakref.py b/lib/greenlet/tests/test_weakref.py
new file mode 100644
index 0000000..6a2ff06
--- /dev/null
+++ b/lib/greenlet/tests/test_weakref.py
@@ -0,0 +1,34 @@
+import gc
+import greenlet
+import weakref
+import unittest
+
+
+class WeakRefTests(unittest.TestCase):
+    def test_dead_weakref(self):
+        def _dead_greenlet():
+            g = greenlet.greenlet(lambda: None)
+            g.switch()
+            return g
+        o = weakref.ref(_dead_greenlet())
+        gc.collect()
+        self.assertEqual(o(), None)
+
+    def test_inactive_weakref(self):
+        o = weakref.ref(greenlet.greenlet())
+        gc.collect()
+        self.assertEqual(o(), None)
+
+    def test_dealloc_weakref(self):
+        seen = []
+        def worker():
+            try:
+                greenlet.getcurrent().parent.switch()
+            finally:
+                seen.append(g())
+        g = greenlet.greenlet(worker)
+        g.switch()
+        g2 = greenlet.greenlet(lambda: None, g)
+        g = weakref.ref(g2)
+        g2 = None
+        self.assertEqual(seen, [None])