gerror: Add special case marshaling for boxing GErrors

Transfer gtype from introspection GError class to Python GError implementation.
Expose the PyGError pointer as an extern so other C files can pick this up.
Add custom to/from GValue marshalers for GError.
Add tests for both complete and incomplete (no boxed pointer held).

https://bugzilla.gnome.org/show_bug.cgi?id=761592

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/test_gobject.py b/tests/test_gobject.py
index 87b0e4ca..e78132df 100644
--- a/tests/test_gobject.py
+++ b/tests/test_gobject.py
@@ -675,5 +675,22 @@ class TestGValue(unittest.TestCase):
         value.set_value([32, 'foo_bar', 0.3])
         self.assertEqual(value.get_value(), [32, 'foo_bar', 0.3])
 
+    def test_gerror_boxing(self):
+        error = GLib.Error('test message', domain='mydomain', code=42)
+        value = GObject.Value(GLib.Error, error)
+        self.assertEqual(value.g_type, GObject.type_from_name('GError'))
+
+        unboxed = value.get_value()
+        self.assertEqual(unboxed.message, error.message)
+        self.assertEqual(unboxed.domain, error.domain)
+        self.assertEqual(unboxed.code, error.code)
+
+    def test_gerror_novalue(self):
+        error = GLib.Error('test message', domain='mydomain', code=42)
+        value = GObject.Value(GLib.Error)
+        self.assertEqual(value.g_type, GObject.type_from_name('GError'))
+        self.assertEqual(value.get_value(), None)
+
+
 if __name__ == '__main__':
     unittest.main()