tests/monitor-unit-tests: Run a client while testing

Run a client while testing and check that it's alive when checking each
monitor configuration.

https://bugzilla.gnome.org/show_bug.cgi?id=730551

src/Makefile-tests.am

@@ -43,6 +43,8 @@ mutter_test_runner_SOURCES = \
 mutter_test_runner_LDADD = $(MUTTER_LIBS) libmutter-$(LIBMUTTER_API_VERSION).la
 
 mutter_test_unit_tests_SOURCES = \
+	tests/test-utils.c \
+	tests/test-utils.h \
 	tests/unit-tests.c \
 	tests/meta-backend-test.c \
 	tests/meta-backend-test.h \

src/tests/monitor-unit-tests.c

@@ -28,6 +28,7 @@
 #include "backends/meta-monitor-config-store.h"
 #include "tests/meta-monitor-manager-test.h"
 #include "tests/monitor-test-utils.h"
+#include "tests/test-utils.h"
 
 #define ALL_TRANSFORMS ((1 << (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)) - 1)
 
@@ -313,6 +314,53 @@ static MonitorTestCase initial_test_case = {
   }
 };
 
+static TestClient *monitor_test_client = NULL;
+
+#define TEST_CLIENT_NAME "client1"
+#define TEST_CLIENT_WINDOW "window1"
+
+static void
+create_monitor_test_client (void)
+{
+  GError *error = NULL;
+
+  monitor_test_client = test_client_new (TEST_CLIENT_NAME,
+                                         META_WINDOW_CLIENT_TYPE_WAYLAND,
+                                         &error);
+  if (!monitor_test_client)
+    g_error ("Failed to launch test client: %s", error->message);
+
+  if (!test_client_do (monitor_test_client, &error,
+                       "create", TEST_CLIENT_WINDOW,
+                       NULL))
+    g_error ("Failed to create window: %s", error->message);
+
+  if (!test_client_do (monitor_test_client, &error,
+                       "show", TEST_CLIENT_WINDOW,
+                       NULL))
+    g_error ("Failed to show the window: %s", error->message);
+}
+
+static void
+check_monitor_test_client_state (void)
+{
+  GError *error = NULL;
+
+  if (!test_client_wait (monitor_test_client, &error))
+    g_error ("Failed to sync test client: %s", error->message);
+}
+
+static void
+destroy_monitor_test_client (void)
+{
+  GError *error = NULL;
+
+  if (!test_client_quit (monitor_test_client, &error))
+    g_error ("Failed to quit test client: %s", error->message);
+
+  test_client_destroy (monitor_test_client);
+}
+
 static MetaOutput *
 output_from_winsys_id (MetaMonitorManager *monitor_manager,
                        long                winsys_id)
@@ -782,6 +830,8 @@ check_monitor_configuration (MonitorTestCase *test_case)
             }
         }
     }
+
+  check_monitor_test_client_state ();
 }
 
 static void
@@ -4876,3 +4926,15 @@ init_monitor_tests (void)
   add_monitor_test ("/backends/monitor/migrated/rotated",
                     meta_test_monitor_migrated_rotated);
 }
+
+void
+pre_run_monitor_tests (void)
+{
+  create_monitor_test_client ();
+}
+
+void
+finish_monitor_tests (void)
+{
+  destroy_monitor_test_client ();
+}

src/tests/monitor-unit-tests.h

@@ -22,4 +22,8 @@
 
 void init_monitor_tests (void);
 
+void pre_run_monitor_tests (void);
+
+void finish_monitor_tests (void);
+
 #endif /* MONITOR_UNIT_TESTS_H */

src/tests/unit-tests.c

@@ -32,6 +32,7 @@
 #include "tests/monitor-config-migration-unit-tests.h"
 #include "tests/monitor-unit-tests.h"
 #include "tests/monitor-store-unit-tests.h"
+#include "tests/test-utils.h"
 #include "wayland/meta-wayland.h"
 
 typedef struct _MetaTestLaterOrderCallbackData
@@ -225,8 +226,12 @@ run_tests (gpointer data)
     settings,
     META_EXPERIMENTAL_FEATURE_SCALE_MONITOR_FRAMEBUFFER);
 
+  pre_run_monitor_tests ();
+
   ret = g_test_run ();
 
+  finish_monitor_tests ();
+
   meta_quit (ret != 0);
 
   return FALSE;
@@ -252,6 +257,7 @@ init_tests (int argc, char **argv)
 int
 main (int argc, char *argv[])
 {
+  test_init (argc, argv);
   init_tests (argc, argv);
 
   meta_plugin_manager_load ("default");