[mutter] tests/monitor-unit-tests: Check meta_monitor_is_active()

[Jonas Ådahl <jadahl src gnome org>]

commit 94d843b80e6dbc515f57b6defe670a2e9fc1e322
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon May 1 12:07:44 2017 +0800

    tests/monitor-unit-tests: Check meta_monitor_is_active()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781723

 src/tests/monitor-unit-tests.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/tests/monitor-unit-tests.c b/src/tests/monitor-unit-tests.c
index b479f5a..2134c68 100644
--- a/src/tests/monitor-unit-tests.c
+++ b/src/tests/monitor-unit-tests.c
@@ -640,6 +640,10 @@ check_monitor_configuration (MonitorTestCase *test_case)
                                             expected_current_mode_index)->data;
 
       g_assert (current_mode == expected_current_mode);
+      if (current_mode)
+        g_assert (meta_monitor_is_active (monitor));
+      else
+        g_assert (!meta_monitor_is_active (monitor));
 
       if (current_mode)
         {