1 files changed, 40 insertions, 0 deletions
diff --git a/lib/python2.7/ctypes/test/test_init.py b/lib/python2.7/ctypes/test/test_init.py
new file mode 100644
index 0000000..82bd1f9
--- /dev/null
+++ b/lib/python2.7/ctypes/test/test_init.py
@@ -0,0 +1,40 @@
+from ctypes import *
+import unittest
+
+class X(Structure):
+    _fields_ = [("a", c_int),
+                ("b", c_int)]
+    new_was_called = False
+
+    def __new__(cls):
+        result = super(X, cls).__new__(cls)
+        result.new_was_called = True
+        return result
+
+    def __init__(self):
+        self.a = 9
+        self.b = 12
+
+class Y(Structure):
+    _fields_ = [("x", X)]
+
+
+class InitTest(unittest.TestCase):
+    def test_get(self):
+        # make sure the only accessing a nested structure
+        # doesn't call the structure's __new__ and __init__
+        y = Y()
+        self.assertEqual((y.x.a, y.x.b), (0, 0))
+        self.assertEqual(y.x.new_was_called, False)
+
+        # But explicitly creating an X structure calls __new__ and __init__, of course.
+        x = X()
+        self.assertEqual((x.a, x.b), (9, 12))
+        self.assertEqual(x.new_was_called, True)
+
+        y.x = x
+        self.assertEqual((y.x.a, y.x.b), (9, 12))
+        self.assertEqual(y.x.new_was_called, False)
+
+if __name__ == "__main__":
+    unittest.main()