[gtk/inspector-display: 1/14] Make a test with a custom display

[Matthias Clasen <matthiasc src gnome org>]

commit 3ee9b0cf4b3439c8a766ad6c35269e4d946dac62
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Dec 7 09:49:10 2019 -0500

    Make a test with a custom display
    
    This completely breaks the inspector.

 tests/simple.c | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/tests/simple.c b/tests/simple.c
index 63ae18f2f6..3369eebcf8 100644
--- a/tests/simple.c
+++ b/tests/simple.c
@@ -33,6 +33,13 @@ main (int argc, char *argv[])
   gtk_init ();
 
   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+
+  if (g_getenv ("CUSTOM_DISPLAY"))
+    {
+      GdkDisplay *display = gdk_display_open (NULL);
+      gtk_window_set_display (GTK_WINDOW (window), display);
+    }
+
   gtk_window_set_title (GTK_WINDOW (window), "hello world");
   gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
   g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);