[pygobject] Improve testcase for tree_view_column_set_attributes

[Martin Pitt <martinpitt src gnome org>]

commit a8338a991bbe919f0e2d9b92f7b71f89ccd2c875
Author: Manuel QuiÃones <manuq laptop org>
Date:   Mon Jul 30 12:53:36 2012 -0300

    Improve testcase for tree_view_column_set_attributes
    
    Signed-off-by: Manuel QuiÃones <manuq laptop org>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=680320

 tests/test_overrides.py |   20 ++++++++++++++++++--
 1 files changed, 18 insertions(+), 2 deletions(-)
---
diff --git a/tests/test_overrides.py b/tests/test_overrides.py
index 2aa803a..cea3e34 100644
--- a/tests/test_overrides.py
+++ b/tests/test_overrides.py
@@ -1662,10 +1662,26 @@ class TestGtk(unittest.TestCase):
                            style=2)
 
     def test_tree_view_column_set_attributes(self):
-        cell = Gtk.CellRendererText()
+        store = Gtk.ListStore(int, str)
+        directors = ['Fellini', 'Tarantino', 'Tarkovskiy']
+        for i, director in enumerate(directors):
+            store.append([i, director])
+
+        treeview = Gtk.TreeView()
+        treeview.set_model(store)
+
         column = Gtk.TreeViewColumn()
+        treeview.append_column(column)
+
+        cell = Gtk.CellRendererText()
         column.pack_start(cell, expand=True)
-        column.set_attributes(cell, text=0, style=2)
+        column.set_attributes(cell, text=1)
+
+        # This will make cell.props.text receive a value, otherwise it
+        # will be None.
+        treeview.get_preferred_size()
+
+        self.assertTrue(cell.props.text in directors)
 
     def test_tree_selection(self):
         store = Gtk.ListStore(int, str)