[pygobject] tests: Add failing regression test for Gtk.TextBuffer.insert-text signal

[Simon Feltman <sfeltman src gnome org>]

commit 4ebb1f5a4750712bd919a31103ed8c8d6af483b3
Author: Simon Feltman <sfeltman src gnome org>
Date:   Sat Sep 6 15:16:06 2014 -0700

    tests: Add failing regression test for Gtk.TextBuffer.insert-text signal
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736175

 tests/test_overrides_gtk.py |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/tests/test_overrides_gtk.py b/tests/test_overrides_gtk.py
index 395b157..711382d 100644
--- a/tests/test_overrides_gtk.py
+++ b/tests/test_overrides_gtk.py
@@ -1858,6 +1858,25 @@ class TestTextBuffer(unittest.TestCase):
         self.assertEqual(start.get_offset(), 6)
         self.assertEqual(end.get_offset(), 11)
 
+    @unittest.expectedFailure  # https://bugzilla.gnome.org/show_bug.cgi?id=736175
+    def test_insert_text_signal_location_modification(self):
+        # Regression test for: https://bugzilla.gnome.org/show_bug.cgi?id=736175
+
+        def callback(buffer, location, text, length):
+            location.assign(buffer.get_end_iter())
+
+        buffer = Gtk.TextBuffer()
+        buffer.set_text('first line\n')
+        buffer.connect('insert-text', callback)
+
+        # attempt insertion at the beginning of the buffer, the callback will
+        # modify the insert location to the end.
+        buffer.place_cursor(buffer.get_start_iter())
+        buffer.insert_at_cursor('second line\n')
+
+        self.assertEqual(buffer.get_property('text'),
+                         'first line\nsecond line\n')
+
 
 @unittest.skipUnless(Gtk, 'Gtk not available')
 class TestContainer(unittest.TestCase):