1 files changed, 50 insertions, 0 deletions
diff --git a/lib/python2.7/ctypes/test/test_varsize_struct.py b/lib/python2.7/ctypes/test/test_varsize_struct.py
new file mode 100644
index 0000000..f409500
--- /dev/null
+++ b/lib/python2.7/ctypes/test/test_varsize_struct.py
@@ -0,0 +1,50 @@
+from ctypes import *
+import unittest
+
+class VarSizeTest(unittest.TestCase):
+    def test_resize(self):
+        class X(Structure):
+            _fields_ = [("item", c_int),
+                        ("array", c_int * 1)]
+
+        self.assertEqual(sizeof(X), sizeof(c_int) * 2)
+        x = X()
+        x.item = 42
+        x.array[0] = 100
+        self.assertEqual(sizeof(x), sizeof(c_int) * 2)
+
+        # make room for one additional item
+        new_size = sizeof(X) + sizeof(c_int) * 1
+        resize(x, new_size)
+        self.assertEqual(sizeof(x), new_size)
+        self.assertEqual((x.item, x.array[0]), (42, 100))
+
+        # make room for 10 additional items
+        new_size = sizeof(X) + sizeof(c_int) * 9
+        resize(x, new_size)
+        self.assertEqual(sizeof(x), new_size)
+        self.assertEqual((x.item, x.array[0]), (42, 100))
+
+        # make room for one additional item
+        new_size = sizeof(X) + sizeof(c_int) * 1
+        resize(x, new_size)
+        self.assertEqual(sizeof(x), new_size)
+        self.assertEqual((x.item, x.array[0]), (42, 100))
+
+    def test_array_invalid_length(self):
+        # cannot create arrays with non-positive size
+        self.assertRaises(ValueError, lambda: c_int * -1)
+        self.assertRaises(ValueError, lambda: c_int * -3)
+
+    def test_zerosized_array(self):
+        array = (c_int * 0)()
+        # accessing elements of zero-sized arrays raise IndexError
+        self.assertRaises(IndexError, array.__setitem__, 0, None)
+        self.assertRaises(IndexError, array.__getitem__, 0)
+        self.assertRaises(IndexError, array.__setitem__, 1, None)
+        self.assertRaises(IndexError, array.__getitem__, 1)
+        self.assertRaises(IndexError, array.__setitem__, -1, None)
+        self.assertRaises(IndexError, array.__getitem__, -1)
+
+if __name__ == "__main__":
+    unittest.main()