[mutter] tests: Add headless start test case

[Jonas Ådahl <jadahl src gnome org>]

commit 3f6a2d02fd5af6da4cc65f6dfbaf38498aeed189
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Aug 18 14:27:42 2017 +0800

    tests: Add headless start test case
    
    Test that mutter starts properly when there are no monitors connected
    yet, and that things work when a monitor is eventually connected.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=730551

 .gitignore                            |    1 +
 src/Makefile-tests.am                 |   28 ++++-
 src/tests/headless-start-test.c       |  203 +++++++++++++++++++++++++++++++++
 src/tests/meta-monitor-manager-test.c |    5 +-
 4 files changed, 232 insertions(+), 5 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 321d773..4d3737d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,6 +55,7 @@ mutter-restart-helper
 mutter-test-client
 mutter-test-runner
 mutter-test-unit-tests
+mutter-test-headless-start-test
 mutter-all.test
 org.gnome.mutter.gschema.valid
 org.gnome.mutter.gschema.xml
diff --git a/src/Makefile-tests.am b/src/Makefile-tests.am
index 40370de..3d8683c 100644
--- a/src/Makefile-tests.am
+++ b/src/Makefile-tests.am
@@ -2,6 +2,13 @@
 
 if HAVE_WAYLAND
 
+test_programs = \
+       mutter-test-client \
+       mutter-test-runner \
+       mutter-test-unit-tests \
+       mutter-test-headless-start-test \
+       $(NULL)
+
 if BUILDOPT_INSTALL_TESTS
 stackingdir = $(pkgdatadir)/tests/stacking
 dist_stacking_DATA =                           \
@@ -19,9 +26,9 @@ installedtestsdir = $(datadir)/installed-tests/mutter
 installedtests_DATA = mutter-all.test
 
 installedtestsbindir = $(libexecdir)/installed-tests/mutter
-installedtestsbin_PROGRAMS = mutter-test-client mutter-test-runner mutter-test-unit-tests
+installedtestsbin_PROGRAMS = $(test_programs)
 else
-noinst_PROGRAMS += mutter-test-client mutter-test-runner mutter-test-unit-tests
+noinst_PROGRAMS += $(test_programs)
 endif
 
 EXTRA_DIST += tests/mutter-all.test.in
@@ -52,7 +59,17 @@ mutter_test_unit_tests_SOURCES = \
        $(NULL)
 mutter_test_unit_tests_LDADD = $(MUTTER_LIBS) libmutter-$(LIBMUTTER_API_VERSION).la
 
-.PHONY: run-tests run-test-runner-tests run-unit-tests
+mutter_test_headless_start_test_SOURCES = \
+       tests/headless-start-test.c \
+       tests/headless-start-test.h \
+       tests/meta-backend-test.c \
+       tests/meta-backend-test.h \
+       tests/meta-monitor-manager-test.c \
+       tests/meta-monitor-manager-test.h \
+       $(NULL)
+mutter_test_headless_start_test_LDADD = $(MUTTER_LIBS) libmutter-$(LIBMUTTER_API_VERSION).la
+
+.PHONY: run-tests run-test-runner-tests run-unit-tests run-headless-start-test
 
 run-test-runner-tests: mutter-test-client mutter-test-runner
        ./mutter-test-runner $(dist_stacking_DATA)
@@ -60,7 +77,10 @@ run-test-runner-tests: mutter-test-client mutter-test-runner
 run-unit-tests: mutter-test-unit-tests
        ./mutter-test-unit-tests
 
-run-tests: run-test-runner-tests run-unit-tests
+run-headless-start-test: mutter-test-headless-start-test
+       ./mutter-test-headless-start-test
+
+run-tests: run-test-runner-tests run-unit-tests run-headless-start-test
 
 endif
 
diff --git a/src/tests/headless-start-test.c b/src/tests/headless-start-test.c
new file mode 100644
index 0000000..f2fb70c
--- /dev/null
+++ b/src/tests/headless-start-test.c
@@ -0,0 +1,203 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "backends/meta-monitor-manager-private.h"
+#include "compositor/meta-plugin-manager.h"
+#include "core/main-private.h"
+#include "meta/main.h"
+#include "tests/meta-backend-test.h"
+#include "tests/meta-monitor-manager-test.h"
+#include "wayland/meta-wayland.h"
+
+#define ALL_TRANSFORMS ((1 << (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)) - 1)
+
+static gboolean
+run_tests (gpointer data)
+{
+  MetaBackend *backend = meta_get_backend ();
+  MetaSettings *settings = meta_backend_get_settings (backend);
+  gboolean ret;
+
+  meta_settings_override_experimental_features (settings);
+
+  meta_settings_enable_experimental_feature (
+    settings,
+    META_EXPERIMENTAL_FEATURE_SCALE_MONITOR_FRAMEBUFFER);
+
+  ret = g_test_run ();
+
+  meta_quit (ret != 0);
+
+  return FALSE;
+}
+
+static void
+meta_test_headless_start (void)
+{
+  MetaBackend *backend = meta_get_backend ();
+  MetaMonitorManager *monitor_manager =
+    meta_backend_get_monitor_manager (backend);
+
+  g_assert_cmpint ((int) monitor_manager->n_modes,
+                   ==,
+                   0);
+  g_assert_cmpint ((int) monitor_manager->n_outputs,
+                   ==,
+                   0);
+  g_assert_cmpint ((int) monitor_manager->n_crtcs,
+                   ==,
+                   0);
+  g_assert_null (monitor_manager->monitors);
+  g_assert_null (monitor_manager->logical_monitors);
+
+  g_assert_cmpint (monitor_manager->screen_width,
+                   ==,
+                   META_MONITOR_MANAGER_MIN_SCREEN_WIDTH);
+  g_assert_cmpint (monitor_manager->screen_height,
+                   ==,
+                   META_MONITOR_MANAGER_MIN_SCREEN_HEIGHT);
+}
+
+static void
+meta_test_headless_monitor_getters (void)
+{
+  MetaDisplay *display;
+  MetaScreen *screen;
+  int index;
+
+  display = meta_get_display ();
+  screen = display->screen;
+
+  index = meta_screen_get_monitor_index_for_rect (screen,
+                                                  &(MetaRectangle) { 0 });
+  g_assert_cmpint (index, ==, -1);
+}
+
+static void
+meta_test_headless_monitor_connect (void)
+{
+  MetaBackend *backend = meta_get_backend ();
+  MetaMonitorManager *monitor_manager =
+    meta_backend_get_monitor_manager (backend);
+  MetaMonitorManagerTest *monitor_manager_test =
+    META_MONITOR_MANAGER_TEST (monitor_manager);
+  MetaMonitorTestSetup *test_setup;
+  MetaCrtcMode **modes;
+  MetaCrtc **possible_crtcs;
+  GList *logical_monitors;
+  ClutterActor *stage;
+
+  test_setup = g_new0 (MetaMonitorTestSetup, 1);
+  test_setup->n_modes = 1;
+  test_setup->modes = g_new0 (MetaCrtcMode, test_setup->n_modes);
+  test_setup->modes[0] = (MetaCrtcMode) {
+    .mode_id = 1,
+    .width = 1024,
+    .height = 768,
+    .refresh_rate = 60.0
+  };
+
+  test_setup->n_crtcs = 1;
+  test_setup->crtcs = g_new0 (MetaCrtc, test_setup->n_crtcs);
+  test_setup->crtcs[0] = (MetaCrtc) {
+    .crtc_id = 1,
+    .all_transforms = ALL_TRANSFORMS
+  };
+
+  modes = g_new0 (MetaCrtcMode *, 1);
+  modes[0] = &test_setup->modes[0];
+
+  possible_crtcs = g_new0 (MetaCrtc *, 1);
+  possible_crtcs[0] = &test_setup->crtcs[0];
+
+  test_setup->n_outputs = 1;
+  test_setup->outputs = g_new0 (MetaOutput, test_setup->n_outputs);
+  test_setup->outputs[0] = (MetaOutput) {
+    .winsys_id = 1,
+    .name = g_strdup ("DP-1"),
+    .vendor = g_strdup ("MetaProduct's Inc."),
+    .product = g_strdup ("MetaMonitor"),
+    .serial = g_strdup ("0x987654"),
+    .preferred_mode = modes[0],
+    .n_modes = 1,
+    .modes = modes,
+    .n_possible_crtcs = 1,
+    .possible_crtcs = possible_crtcs,
+    .backlight = -1,
+    .connector_type = META_CONNECTOR_TYPE_DisplayPort
+  };
+
+  meta_monitor_manager_test_emulate_hotplug (monitor_manager_test, test_setup);
+
+  logical_monitors =
+    meta_monitor_manager_get_logical_monitors (monitor_manager);
+  g_assert_cmpint (g_list_length (logical_monitors), ==, 1);
+
+  g_assert_cmpint (monitor_manager->screen_width, ==, 1024);
+  g_assert_cmpint (monitor_manager->screen_height, ==, 768);
+
+  stage = meta_backend_get_stage (backend);
+  g_assert_cmpint (clutter_actor_get_width (stage), ==, 1024);
+  g_assert_cmpint (clutter_actor_get_height (stage), ==, 768);
+}
+
+static MetaMonitorTestSetup *
+create_headless_test_setup (void)
+{
+  return g_new0 (MetaMonitorTestSetup, 1);
+}
+
+static void
+init_tests (int argc, char **argv)
+{
+  g_test_init (&argc, &argv, NULL);
+  g_test_bug_base ("http://bugzilla.gnome.org/show_bug.cgi?id=";);
+
+  MetaMonitorTestSetup *initial_test_setup;
+
+  initial_test_setup = create_headless_test_setup ();
+  meta_monitor_manager_test_init_test_setup (initial_test_setup);
+
+  g_test_add_func ("/headless-start/start", meta_test_headless_start);
+  g_test_add_func ("/headless-start/monitor-getters",
+                   meta_test_headless_monitor_getters);
+  g_test_add_func ("/headless-start/connect",
+                   meta_test_headless_monitor_connect);
+}
+
+int
+main (int argc, char *argv[])
+{
+  init_tests (argc, argv);
+
+  meta_plugin_manager_load ("default");
+
+  meta_override_compositor_configuration (META_COMPOSITOR_TYPE_WAYLAND,
+                                          META_TYPE_BACKEND_TEST);
+  meta_wayland_override_display_name ("mutter-test-display");
+
+  meta_init ();
+  meta_register_with_session ();
+
+  g_idle_add (run_tests, NULL);
+
+  return meta_run ();
+}
diff --git a/src/tests/meta-monitor-manager-test.c b/src/tests/meta-monitor-manager-test.c
index 4b0634e..3e105de 100644
--- a/src/tests/meta-monitor-manager-test.c
+++ b/src/tests/meta-monitor-manager-test.c
@@ -372,7 +372,10 @@ meta_monitor_manager_test_calculate_monitor_mode_scale (MetaMonitorManager *mana
   output = meta_monitor_get_main_output (monitor);
   output_test = output->driver_private;
 
-  return output_test->scale;
+  if (output_test)
+    return output_test->scale;
+  else
+    return 1;
 }
 
 static float *