Add some tests for GtkWindow

These tests may have some assumptions on reasonable window manager
behaviour.  For now, we just test that the default size of the
window ends up as the allocated size of the content. This test
currently fails with client-side decorations, because we are
not properly discriminating between overall window size and
content size.

gtk/tests/Makefile.am

@@ -176,6 +176,10 @@ TEST_PROGS			+= objects-finalize
 objects_finalize_SOURCES         = objects-finalize.c
 objects_finalize_LDADD	         = $(progs_ldadd)
 
+TEST_PROGS			+= window
+window_SOURCES			 = window.c
+window_LDADD			 = $(progs_ldadd)
+
 EXTRA_DIST +=				\
 	file-chooser-test-dir/empty     \
 	file-chooser-test-dir/text.txt

gtk/tests/window.c

@@ -0,0 +1,50 @@
+#include <gtk/gtk.h>
+
+static gboolean
+stop_main (gpointer data)
+{
+  gtk_main_quit ();
+
+  return G_SOURCE_REMOVE;
+}
+
+static void
+test_default_size (void)
+{
+  GtkWidget *window;
+  GtkWidget *box;
+  gint w, h;
+
+  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+  box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+  gtk_container_add (GTK_CONTAINER (window), box);
+
+  gtk_window_get_default_size (GTK_WINDOW (window), &w, &h);
+  g_assert (w == -1 && h == -1);
+
+  gtk_window_set_default_size (GTK_WINDOW (window), 300, 300);
+
+  gtk_window_get_default_size (GTK_WINDOW (window), &w, &h);
+  g_assert (w == 300 && h == 300);
+
+  gtk_widget_show_all (window);
+
+  g_timeout_add (1000, stop_main, NULL);
+  gtk_main ();
+
+  g_assert (gtk_widget_get_allocated_width (window) == 300);
+  g_assert (gtk_widget_get_allocated_height (window) == 300);
+
+  g_assert (gtk_widget_get_allocated_width (box) == 300);
+  g_assert (gtk_widget_get_allocated_height (box) == 300);
+}
+
+int
+main (int argc, char *argv[])
+{
+  gtk_test_init (&argc, &argv);
+
+  g_test_add_func ("/window/default-size", test_default_size);
+
+  return g_test_run ();
+}