[pypy-commit] cffi default: Add a test

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 
Changeset: r1288:2a9609999f81
Date: 2013-07-18 21:58 +0200
http://bitbucket.org/cffi/cffi/changeset/2a9609999f81/

Log:	Add a test

diff --git a/c/test_c.py b/c/test_c.py
--- a/c/test_c.py
+++ b/c/test_c.py
@@ -1230,6 +1230,23 @@
     for i, f in enumerate(flist):
         assert f(-142) == -142 + i
 
+def test_callback_returning_tiny_struct():
+    BSChar = new_primitive_type("signed char")
+    BInt = new_primitive_type("int")
+    BStruct = new_struct_type("struct foo")
+    BStructPtr = new_pointer_type(BStruct)
+    complete_struct_or_union(BStruct, [('a', BSChar, -1),
+                                       ('b', BSChar, -1)])
+    def cb(n):
+        return newp(BStructPtr, [-n, -3*n])[0]
+    BFunc = new_function_type((BInt,), BStruct)
+    f = callback(BFunc, cb)
+    s = f(10)
+    assert typeof(s) is BStruct
+    assert repr(s) == "<cdata 'struct foo' owning 2 bytes>"
+    assert s.a == -10
+    assert s.b == -30
+
 def test_callback_returning_struct():
     BSChar = new_primitive_type("signed char")
     BInt = new_primitive_type("int")