1 files changed, 42 insertions, 0 deletions
diff --git a/lib/python2.7/ctypes/test/test_incomplete.py b/lib/python2.7/ctypes/test/test_incomplete.py
new file mode 100644
index 0000000..1e03e9f
--- /dev/null
+++ b/lib/python2.7/ctypes/test/test_incomplete.py
@@ -0,0 +1,42 @@
+import unittest
+from ctypes import *
+
+################################################################
+#
+# The incomplete pointer example from the tutorial
+#
+
+class MyTestCase(unittest.TestCase):
+
+    def test_incomplete_example(self):
+        lpcell = POINTER("cell")
+        class cell(Structure):
+            _fields_ = [("name", c_char_p),
+                        ("next", lpcell)]
+
+        SetPointerType(lpcell, cell)
+
+        c1 = cell()
+        c1.name = "foo"
+        c2 = cell()
+        c2.name = "bar"
+
+        c1.next = pointer(c2)
+        c2.next = pointer(c1)
+
+        p = c1
+
+        result = []
+        for i in range(8):
+            result.append(p.name)
+            p = p.next[0]
+        self.assertEqual(result, ["foo", "bar"] * 4)
+
+        # to not leak references, we must clean _pointer_type_cache
+        from ctypes import _pointer_type_cache
+        del _pointer_type_cache[cell]
+
+################################################################
+
+if __name__ == '__main__':
+    unittest.main()