From 195766cb69dfbf759a25dbac901b1ed160b7cd5f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20=C3=85dahl?= <jadahl@gmail.com>
Date: Fri, 28 Jan 2022 00:12:59 +0100
Subject: [PATCH] tests: Add helper for creating virtual test monitors

This uses virtual monitors in the headless backend, in contrast to the
ones used by the monitor configuration tests which use the nseted
backend.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2262>
---
 src/tests/meta-test-utils.c    | 30 ++++++++++++++++++++++++++++++
 src/tests/meta-test-utils.h    |  6 ++++++
 src/tests/wayland-unit-tests.c | 19 ++++---------------
 3 files changed, 40 insertions(+), 15 deletions(-)

diff --git a/src/tests/meta-test-utils.c b/src/tests/meta-test-utils.c
index 6be07af04..c70886a6b 100644
--- a/src/tests/meta-test-utils.c
+++ b/src/tests/meta-test-utils.c
@@ -26,6 +26,7 @@
 #include <X11/Xlib-xcb.h>
 
 #include "backends/meta-monitor-config-store.h"
+#include "backends/meta-virtual-monitor.h"
 #include "core/display-private.h"
 #include "core/window-private.h"
 #include "meta-test/meta-context-test.h"
@@ -645,3 +646,32 @@ meta_wait_for_paint (MetaContext *context)
     g_main_context_iteration (NULL, TRUE);
   g_signal_handler_disconnect (stage, handler_id);
 }
+
+MetaVirtualMonitor *
+meta_create_test_monitor (MetaContext *context,
+                          int          width,
+                          int          height,
+                          float        refresh_rate)
+{
+  MetaBackend *backend = meta_context_get_backend (context);
+  MetaMonitorManager *monitor_manager = meta_backend_get_monitor_manager (backend);
+  g_autoptr (MetaVirtualMonitorInfo) monitor_info = NULL;
+  g_autoptr (GError) error = NULL;
+  static int serial_count = 0x10000;
+  g_autofree char *serial = NULL;
+  MetaVirtualMonitor *virtual_monitor;
+
+  serial = g_strdup_printf ("0x%x", serial_count++);
+  monitor_info = meta_virtual_monitor_info_new (width, height, refresh_rate,
+                                                "MetaTestVendor",
+                                                "MetaVirtualMonitor",
+                                                serial);
+  virtual_monitor = meta_monitor_manager_create_virtual_monitor (monitor_manager,
+                                                                 monitor_info,
+                                                                 &error);
+  if (!virtual_monitor)
+    g_error ("Failed to create virtual monitor: %s", error->message);
+  meta_monitor_manager_reload (monitor_manager);
+
+  return virtual_monitor;
+}
diff --git a/src/tests/meta-test-utils.h b/src/tests/meta-test-utils.h
index 2a42fa641..423f96c49 100644
--- a/src/tests/meta-test-utils.h
+++ b/src/tests/meta-test-utils.h
@@ -121,4 +121,10 @@ void meta_set_custom_monitor_config (MetaBackend            *backend,
 META_EXPORT
 void meta_wait_for_paint (MetaContext *context);
 
+META_EXPORT
+MetaVirtualMonitor * meta_create_test_monitor (MetaContext *context,
+                                               int          width,
+                                               int          height,
+                                               float        refresh_rate);
+
 #endif /* TEST_UTILS_H */
diff --git a/src/tests/wayland-unit-tests.c b/src/tests/wayland-unit-tests.c
index f7e201e04..185d3cc6a 100644
--- a/src/tests/wayland-unit-tests.c
+++ b/src/tests/wayland-unit-tests.c
@@ -24,6 +24,7 @@
 #include "core/display-private.h"
 #include "core/window-private.h"
 #include "meta-test/meta-context-test.h"
+#include "tests/meta-test-utils.h"
 #include "tests/meta-wayland-test-driver.h"
 #include "tests/meta-wayland-test-utils.h"
 #include "wayland/meta-wayland-surface.h"
@@ -365,30 +366,18 @@ toplevel_activation (void)
 static void
 on_before_tests (void)
 {
-  MetaBackend *backend = meta_context_get_backend (test_context);
-  MetaMonitorManager *monitor_manager = meta_backend_get_monitor_manager (backend);
   MetaWaylandCompositor *compositor =
     meta_context_get_wayland_compositor (test_context);
-  g_autoptr (MetaVirtualMonitorInfo) monitor_info = NULL;
-  g_autoptr (GError) error = NULL;
 
   test_driver = meta_wayland_test_driver_new (compositor);
-
-  monitor_info = meta_virtual_monitor_info_new (400, 400, 60.0,
-                                                "MetaTestVendor",
-                                                "MetaVirtualMonitor",
-                                                "0x1234");
-  virtual_monitor = meta_monitor_manager_create_virtual_monitor (monitor_manager,
-                                                                 monitor_info,
-                                                                 &error);
-  if (!virtual_monitor)
-    g_error ("Failed to create virtual monitor: %s", error->message);
-  meta_monitor_manager_reload (monitor_manager);
+  virtual_monitor = meta_create_test_monitor (test_context,
+                                              400, 400, 60.0);
 }
 
 static void
 on_after_tests (void)
 {
+  g_clear_object (&test_driver);
   g_clear_object (&virtual_monitor);
 }