[glib] Add a test for g_signal_get_invocation_hint

[Matthias Clasen <matthiasc src gnome org>]

commit e81e33b35d389f14858015d759c9a3f416420c2d
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Nov 23 20:06:07 2013 -0500

    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 files changed, 47 insertions(+), 0 deletions(-)
---
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 ();
 }