[mutter] tests: Use special purpose backend in unit tests

[Jonas Ådahl <jadahl src gnome org>]

commit a251675cc009fa69668a0b49d9347b5f1acca178
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Dec 5 18:38:43 2016 +0800

    tests: Use special purpose backend in unit tests
    
    Use a special purpose backend when running the unit tests. This will
    eventually allow testing things like configuration and hot plugging.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777732

 src/Makefile-tests.am                 |    8 +-
 src/tests/meta-backend-test.c         |   50 ++++++++
 src/tests/meta-backend-test.h         |   29 +++++
 src/tests/meta-monitor-manager-test.c |  220 +++++++++++++++++++++++++++++++++
 src/tests/meta-monitor-manager-test.h |   29 +++++
 src/tests/unit-tests.c                |   20 +--
 6 files changed, 342 insertions(+), 14 deletions(-)
---
diff --git a/src/Makefile-tests.am b/src/Makefile-tests.am
index 043ef38..3c5793d 100644
--- a/src/Makefile-tests.am
+++ b/src/Makefile-tests.am
@@ -32,7 +32,13 @@ mutter_test_client_LDADD = $(MUTTER_LIBS) libmutter.la
 mutter_test_runner_SOURCES = tests/test-runner.c
 mutter_test_runner_LDADD = $(MUTTER_LIBS) libmutter.la
 
-mutter_test_unit_tests_SOURCES = tests/unit-tests.c
+mutter_test_unit_tests_SOURCES = \
+       tests/unit-tests.c \
+       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_unit_tests_LDADD = $(MUTTER_LIBS) libmutter.la
 
 .PHONY: run-tests run-test-runner-tests run-unit-tests
diff --git a/src/tests/meta-backend-test.c b/src/tests/meta-backend-test.c
new file mode 100644
index 0000000..e516c86
--- /dev/null
+++ b/src/tests/meta-backend-test.c
@@ -0,0 +1,50 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2016 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 "tests/meta-backend-test.h"
+
+#include "tests/meta-monitor-manager-test.h"
+
+struct _MetaBackendTest
+{
+  MetaBackendX11 parent;
+};
+
+G_DEFINE_TYPE (MetaBackendTest, meta_backend_test, META_TYPE_BACKEND_X11)
+
+static void
+meta_backend_test_init (MetaBackendTest *backend_test)
+{
+}
+
+static MetaMonitorManager *
+meta_backend_test_create_monitor_manager (MetaBackend *backend)
+{
+  return g_object_new (META_TYPE_MONITOR_MANAGER_TEST, NULL);
+}
+
+static void
+meta_backend_test_class_init (MetaBackendTestClass *klass)
+{
+  MetaBackendClass *backend_class = META_BACKEND_CLASS (klass);
+
+  backend_class->create_monitor_manager = meta_backend_test_create_monitor_manager;
+}
diff --git a/src/tests/meta-backend-test.h b/src/tests/meta-backend-test.h
new file mode 100644
index 0000000..e666212
--- /dev/null
+++ b/src/tests/meta-backend-test.h
@@ -0,0 +1,29 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2016 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/>.
+ */
+
+#ifndef META_BACKEND_TEST_H
+#define META_BACKEND_TEST_H
+
+#include "backends/x11/meta-backend-x11.h"
+
+#define META_TYPE_BACKEND_TEST (meta_backend_test_get_type ())
+G_DECLARE_FINAL_TYPE (MetaBackendTest, meta_backend_test,
+                      META, BACKEND_TEST, MetaBackendX11)
+
+#endif /* META_BACKEND_TEST_H */
diff --git a/src/tests/meta-monitor-manager-test.c b/src/tests/meta-monitor-manager-test.c
new file mode 100644
index 0000000..88e7c29
--- /dev/null
+++ b/src/tests/meta-monitor-manager-test.c
@@ -0,0 +1,220 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2016 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 "tests/meta-monitor-manager-test.h"
+
+#define ALL_TRANSFORMS ((1 << (META_MONITOR_TRANSFORM_FLIPPED_270 + 1)) - 1)
+
+struct _MetaMonitorManagerTest
+{
+  MetaMonitorManager parent;
+};
+
+G_DEFINE_TYPE (MetaMonitorManagerTest, meta_monitor_manager_test,
+               META_TYPE_MONITOR_MANAGER)
+
+static void
+meta_monitor_manager_test_read_current (MetaMonitorManager *manager)
+{
+  int n_monitors = 2;
+  int i;
+
+  manager->max_screen_width = 65535;
+  manager->max_screen_height = 65535;
+  manager->screen_width = 1024;
+  manager->screen_height = 768;
+
+  manager->modes = g_new0 (MetaMonitorMode, 1);
+  manager->n_modes = 1;
+
+  manager->modes[0].mode_id = 0;
+  manager->modes[0].width = 1024;
+  manager->modes[0].height = 768;
+  manager->modes[0].refresh_rate = 60.0;
+
+  manager->crtcs = g_new0 (MetaCRTC, n_monitors);
+  manager->n_crtcs = n_monitors;
+  manager->outputs = g_new0 (MetaOutput, n_monitors);
+  manager->n_outputs = n_monitors;
+
+  for (i = 0; i < n_monitors; i++)
+    {
+      manager->crtcs[i].crtc_id = i + 1;
+      manager->crtcs[i].current_mode = &manager->modes[0];
+      manager->crtcs[i].transform = META_MONITOR_TRANSFORM_NORMAL;
+      manager->crtcs[i].all_transforms = ALL_TRANSFORMS;
+
+
+      manager->outputs[i].crtc = &manager->crtcs[i];
+      manager->outputs[i].winsys_id = i + 1;
+      manager->outputs[i].name = g_strdup_printf ("LVDS%d", i + 1);
+      manager->outputs[i].vendor = g_strdup ("MetaProducts Inc.");
+      manager->outputs[i].product = g_strdup ("unknown");
+      manager->outputs[i].serial = g_strdup ("0xC0FFEE");
+      manager->outputs[i].suggested_x = -1;
+      manager->outputs[i].suggested_y = -1;
+      manager->outputs[i].width_mm = 222;
+      manager->outputs[i].height_mm = 125;
+      manager->outputs[i].subpixel_order = COGL_SUBPIXEL_ORDER_UNKNOWN;
+      manager->outputs[i].preferred_mode = &manager->modes[0];
+      manager->outputs[i].n_modes = 1;
+      manager->outputs[i].modes = g_new0 (MetaMonitorMode *, 1);
+      manager->outputs[i].modes[0] = &manager->modes[0];
+      manager->outputs[i].n_possible_crtcs = 1;
+      manager->outputs[i].possible_crtcs = g_new0 (MetaCRTC *, 1);
+      manager->outputs[i].possible_crtcs[0] = &manager->crtcs[i];
+      manager->outputs[i].n_possible_clones = 0;
+      manager->outputs[i].possible_clones = g_new0 (MetaOutput *, 0);
+      manager->outputs[i].backlight = -1;
+      manager->outputs[i].backlight_min = 0;
+      manager->outputs[i].backlight_max = 0;
+      manager->outputs[i].connector_type = META_CONNECTOR_TYPE_LVDS;
+      manager->outputs[i].scale = 1;
+    }
+}
+
+static void
+meta_monitor_manager_test_apply_configuration (MetaMonitorManager *manager,
+                                               MetaCRTCInfo      **crtcs,
+                                               unsigned int        n_crtcs,
+                                               MetaOutputInfo    **outputs,
+                                               unsigned int        n_outputs)
+{
+  unsigned int i;
+  int screen_width = 0, screen_height = 0;
+
+  for (i = 0; i < n_crtcs; i++)
+    {
+      MetaCRTCInfo *crtc_info = crtcs[i];
+      MetaCRTC *crtc = crtc_info->crtc;
+      crtc->is_dirty = TRUE;
+
+      if (crtc_info->mode == NULL)
+        {
+          crtc->rect.x = 0;
+          crtc->rect.y = 0;
+          crtc->rect.width = 0;
+          crtc->rect.height = 0;
+          crtc->current_mode = NULL;
+        }
+      else
+        {
+          MetaMonitorMode *mode;
+          MetaOutput *output;
+          unsigned int j;
+          int width, height;
+
+          mode = crtc_info->mode;
+
+          if (meta_monitor_transform_is_rotated (crtc_info->transform))
+            {
+              width = mode->height;
+              height = mode->width;
+            }
+          else
+            {
+              width = mode->width;
+              height = mode->height;
+            }
+
+          crtc->rect.x = crtc_info->x;
+          crtc->rect.y = crtc_info->y;
+          crtc->rect.width = width;
+          crtc->rect.height = height;
+          crtc->current_mode = mode;
+          crtc->transform = crtc_info->transform;
+
+          screen_width = MAX (screen_width, crtc_info->x + width);
+          screen_height = MAX (screen_height, crtc_info->y + height);
+
+          for (j = 0; j < crtc_info->outputs->len; j++)
+            {
+              output = ((MetaOutput**)crtc_info->outputs->pdata)[j];
+
+              output->is_dirty = TRUE;
+              output->crtc = crtc;
+            }
+        }
+    }
+
+  for (i = 0; i < n_outputs; i++)
+    {
+      MetaOutputInfo *output_info = outputs[i];
+      MetaOutput *output = output_info->output;
+
+      output->is_primary = output_info->is_primary;
+      output->is_presentation = output_info->is_presentation;
+    }
+
+  /* Disable CRTCs not mentioned in the list */
+  for (i = 0; i < manager->n_crtcs; i++)
+    {
+      MetaCRTC *crtc = &manager->crtcs[i];
+
+      crtc->logical_monitor = NULL;
+
+      if (crtc->is_dirty)
+        {
+          crtc->is_dirty = FALSE;
+          continue;
+        }
+
+      crtc->rect.x = 0;
+      crtc->rect.y = 0;
+      crtc->rect.width = 0;
+      crtc->rect.height = 0;
+      crtc->current_mode = NULL;
+    }
+
+  /* Disable outputs not mentioned in the list */
+  for (i = 0; i < manager->n_outputs; i++)
+    {
+      MetaOutput *output = &manager->outputs[i];
+
+      if (output->is_dirty)
+        {
+          output->is_dirty = FALSE;
+          continue;
+        }
+
+      output->crtc = NULL;
+      output->is_primary = FALSE;
+    }
+
+  manager->screen_width = screen_width;
+  manager->screen_height = screen_height;
+
+  meta_monitor_manager_rebuild_derived (manager);
+}
+
+static void
+meta_monitor_manager_test_init (MetaMonitorManagerTest *manager_test)
+{
+}
+
+static void
+meta_monitor_manager_test_class_init (MetaMonitorManagerTestClass *klass)
+{
+  MetaMonitorManagerClass *manager_class = META_MONITOR_MANAGER_CLASS (klass);
+
+  manager_class->read_current = meta_monitor_manager_test_read_current;
+  manager_class->apply_configuration = meta_monitor_manager_test_apply_configuration;
+}
diff --git a/src/tests/meta-monitor-manager-test.h b/src/tests/meta-monitor-manager-test.h
new file mode 100644
index 0000000..91120ca
--- /dev/null
+++ b/src/tests/meta-monitor-manager-test.h
@@ -0,0 +1,29 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2016 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/>.
+ */
+
+#ifndef META_MONITOR_MANAGER_TEST_H
+#define META_MONITOR_MANAGER_TEST_H
+
+#include "backends/meta-monitor-manager-private.h"
+
+#define META_TYPE_MONITOR_MANAGER_TEST (meta_monitor_manager_test_get_type ())
+G_DECLARE_FINAL_TYPE (MetaMonitorManagerTest, meta_monitor_manager_test,
+                      META, MONITOR_MANAGER_TEST, MetaMonitorManager)
+
+#endif /* META_MONITOR_MANAGER_TEST_H */
diff --git a/src/tests/unit-tests.c b/src/tests/unit-tests.c
index 37332f0..4a6d101 100644
--- a/src/tests/unit-tests.c
+++ b/src/tests/unit-tests.c
@@ -17,6 +17,8 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "config.h"
+
 #include <glib.h>
 #include <stdlib.h>
 
@@ -24,6 +26,8 @@
 #include <meta/util.h>
 
 #include "compositor/meta-plugin-manager.h"
+#include "core/main-private.h"
+#include "tests/meta-backend-test.h"
 
 typedef struct _MetaTestLaterOrderCallbackData
 {
@@ -213,21 +217,11 @@ main (int argc, char *argv[])
 
   g_option_context_free (ctx);
 
-  const char *fake_args[] = { NULL, "--wayland", "--nested" };
-  fake_args[0] = argv[0];
-  char **fake_argv = (char**)fake_args;
-  int fake_argc = G_N_ELEMENTS (fake_args);
-
-  ctx = meta_get_option_context ();
-  if (!g_option_context_parse (ctx, &fake_argc, &fake_argv, &error))
-    {
-      g_printerr ("mutter: %s\n", error->message);
-      exit (1);
-    }
-  g_option_context_free (ctx);
-
   meta_plugin_manager_load ("default");
 
+  meta_override_compositor_configuration (META_COMPOSITOR_TYPE_WAYLAND,
+                                          META_TYPE_BACKEND_TEST);
+
   meta_init ();
   meta_register_with_session ();