[gobject-introspection] tests: Add transformer tests for callback typedefs

[Simon Feltman <sfeltman src gnome org>]

commit 802a048819b9d0acb9c004eeba05d74e46170d3d
Author: Simon Feltman <sfeltman src gnome org>
Date:   Sat Dec 28 03:15:49 2013 -0800

    tests: Add transformer tests for callback typedefs
    
    Add a basic transformer unittest for callback typedefs.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=581525

 tests/scanner/test_transformer.py |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/tests/scanner/test_transformer.py b/tests/scanner/test_transformer.py
index 5a0e82c..abfce18 100644
--- a/tests/scanner/test_transformer.py
+++ b/tests/scanner/test_transformer.py
@@ -428,5 +428,21 @@ class TestUnions(unittest.TestCase):
         self.assertEqual(nested.fields[1].type.ctype, 'float')
 
 
+class TestCallbacks(unittest.TestCase):
+    def setUp(self):
+        # Hack to set logging singleton
+        self.namespace = ast.Namespace('Test', '1.0')
+        logger = MessageLogger.get(namespace=self.namespace)
+        logger.enable_warnings((WARNING, ERROR, FATAL))
+
+    def test_union_with_struct(self):
+        load_namespace_from_source_string(self.namespace, """
+            typedef void (*TestCallback)(int value);
+            """)
+        self.assertEqual(len(self.namespace.names), 1)
+        node = self.namespace.get('Callback')
+        self.assertTrue(isinstance(node, ast.Callback))
+
+
 if __name__ == '__main__':
     unittest.main()