From e81e33b35d389f14858015d759c9a3f416420c2d Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Sat, 23 Nov 2013 20:06:07 -0500
Subject: [PATCH] Add a test for g_signal_get_invocation_hint

This is the sole piece of code in GLib where we make use of the
stack growing direction. And this test proves that we have been
getting the direction wrong all these years...
---
 gobject/tests/signals.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/gobject/tests/signals.c b/gobject/tests/signals.c
index a8ff35b..45f4846 100644
--- a/gobject/tests/signals.c
+++ b/gobject/tests/signals.c
@@ -75,6 +75,7 @@ static GType enum_type;
 static GType flags_type;
 
 static guint simple_id;
+static guint simple2_id;
 
 typedef struct _Test Test;
 typedef struct _TestClass TestClass;
@@ -121,6 +122,14 @@ test_class_init (TestClass *klass)
                 NULL,
                 G_TYPE_NONE,
                 0);
+  simple2_id = g_signal_new ("simple-2",
+                G_TYPE_FROM_CLASS (klass),
+                G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
+                0,
+                NULL, NULL,
+                NULL,
+                G_TYPE_NONE,
+                0);
   g_signal_new ("generic-marshaller-1",
                 G_TYPE_FROM_CLASS (klass),
                 G_SIGNAL_RUN_LAST,
@@ -877,6 +886,42 @@ test_emission_hook (void)
   g_object_unref (test2);
 }
 
+static void
+simple_cb (gpointer instance, gpointer data)
+{
+  GSignalInvocationHint *ihint;
+
+  ihint = g_signal_get_invocation_hint (instance);
+
+  g_assert_cmpstr (g_signal_name (ihint->signal_id), ==, "simple");
+
+  g_signal_emit_by_name (instance, "simple-2");
+}
+
+static void
+simple2_cb (gpointer instance, gpointer data)
+{
+  GSignalInvocationHint *ihint;
+
+  ihint = g_signal_get_invocation_hint (instance);
+
+  g_assert_cmpstr (g_signal_name (ihint->signal_id), ==, "simple-2");
+}
+
+static void
+test_invocation_hint (void)
+{
+  GObject *test;
+
+  test = g_object_new (test_get_type (), NULL);
+
+  g_signal_connect (test, "simple", G_CALLBACK (simple_cb), NULL);
+  g_signal_connect (test, "simple-2", G_CALLBACK (simple2_cb), NULL);
+  g_signal_emit_by_name (test, "simple");
+
+  g_object_unref (test);
+}
+
 static gboolean
 in_set (const gchar *s,
         const gchar *set[])
@@ -901,6 +946,7 @@ test_introspection (void)
   gint i;
   const gchar *names[] = {
     "simple",
+    "simple-2",
     "generic-marshaller-1",
     "generic-marshaller-2",
     "generic-marshaller-enum-return-signed",
@@ -1066,6 +1112,7 @@ main (int argc,
   g_test_add_func ("/gobject/signals/introspection", test_introspection);
   g_test_add_func ("/gobject/signals/block-handler", test_block_handler);
   g_test_add_func ("/gobject/signals/stop-emission", test_stop_emission);
+  g_test_add_func ("/gobject/signals/invocation-hint", test_invocation_hint);
 
   return g_test_run ();
 }
-- 
2.7.4