[pygobject/wip/jfelder/gtk4-toolbutton: 2/2] gtk overrides: Drop Gtk.main for Gtk4

[Jean Felder <jfelder src gnome org>]

commit 8d94caf3798518f1e09312514b4ee8bbd7af0bd9
Author: Jean Felder <jean felder gmail com>
Date:   Mon Mar 16 20:46:17 2020 +0100

    gtk overrides: Drop Gtk.main for Gtk4
    
    It has been removed (gtk commit
    4dd780a96b1d37903ab88a4ae4536329cd9e164e)
    
    The associated test is skipped for Gtk 4.

 gi/overrides/Gtk.py         | 24 +++++++++++-------------
 tests/test_overrides_gtk.py |  1 +
 2 files changed, 12 insertions(+), 13 deletions(-)
---
diff --git a/gi/overrides/Gtk.py b/gi/overrides/Gtk.py
index 74555d16..b4213642 100644
--- a/gi/overrides/Gtk.py
+++ b/gi/overrides/Gtk.py
@@ -1614,22 +1614,20 @@ if Gtk._version == '3.0':
     Menu = override(Menu)
     __all__.append('Menu')
 
-_Gtk_main_quit = Gtk.main_quit
-
-
-@override(Gtk.main_quit)
-def main_quit(*args):
-    _Gtk_main_quit()
-
+if Gtk._version in ("2.0", "3.0"):
+    _Gtk_main_quit = Gtk.main_quit
 
-_Gtk_main = Gtk.main
+    @override(Gtk.main_quit)
+    def main_quit(*args):
+        _Gtk_main_quit()
 
+    _Gtk_main = Gtk.main
 
-@override(Gtk.main)
-def main(*args, **kwargs):
-    with register_sigint_fallback(Gtk.main_quit):
-        with wakeup_on_signal():
-            return _Gtk_main(*args, **kwargs)
+    @override(Gtk.main)
+    def main(*args, **kwargs):
+        with register_sigint_fallback(Gtk.main_quit):
+            with wakeup_on_signal():
+                return _Gtk_main(*args, **kwargs)
 
 
 if Gtk._version in ("2.0", "3.0"):
diff --git a/tests/test_overrides_gtk.py b/tests/test_overrides_gtk.py
index 9c32e8ba..5c0fea97 100644
--- a/tests/test_overrides_gtk.py
+++ b/tests/test_overrides_gtk.py
@@ -812,6 +812,7 @@ class TestGtk(unittest.TestCase):
         self.assertEqual(stock_item.stock_id, 'gtk-ok')
         self.assertEqual(Gtk.stock_lookup('nosuchthing'), None)
 
+    @unittest.skipIf(Gtk_version == "4.0", "not in gtk4")
     def test_gtk_main(self):
         # with no arguments
         GLib.idle_add(Gtk.main_quit)