monitor-unit-tests: Test suggested-x/y configuration

Test the suggested-x/y output state often set by virtual machines.

https://bugzilla.gnome.org/show_bug.cgi?id=777732

src/tests/monitor-unit-tests.c

@@ -1057,6 +1057,135 @@ meta_test_monitor_hidpi_linear_config (void)
   check_monitor_configuration (&test_case);
 }
 
+static void
+meta_test_monitor_suggested_config (void)
+{
+  MonitorTestCase test_case = {
+    .setup = {
+      .modes = {
+        {
+          .width = 800,
+          .height = 600,
+          .refresh_rate = 60.0
+        },
+        {
+          .width = 1024,
+          .height = 768,
+          .refresh_rate = 60.0
+        }
+      },
+      .n_modes = 2,
+      .outputs = {
+        {
+          .crtc = 0,
+          .modes = { 0 },
+          .n_modes = 1,
+          .preferred_mode = 0,
+          .possible_crtcs = { 0 },
+          .n_possible_crtcs = 1,
+          .width_mm = 222,
+          .height_mm = 125
+        },
+        {
+          .crtc = 1,
+          .modes = { 1 },
+          .n_modes = 1,
+          .preferred_mode = 1,
+          .possible_crtcs = { 1 },
+          .n_possible_crtcs = 1,
+          .width_mm = 220,
+          .height_mm = 124
+        }
+      },
+      .n_outputs = 2,
+      .crtcs = {
+        {
+          .current_mode = -1
+        },
+        {
+          .current_mode = -1
+        }
+      },
+      .n_crtcs = 2
+    },
+
+    .expect = {
+      .monitors = {
+        {
+          .outputs = { 0 },
+          .n_outputs = 1,
+          .modes = {
+            {
+              .width = 800,
+              .height = 600,
+              .crtc_modes = {
+                {
+                  .output = 0,
+                  .crtc_mode = 0
+                }
+              }
+            }
+          },
+          .n_modes = 1,
+          .width_mm = 222,
+          .height_mm = 125
+        },
+        {
+          .outputs = { 1 },
+          .n_outputs = 1,
+          .modes = {
+            {
+              .width = 1024,
+              .height = 768,
+              .crtc_modes = {
+                {
+                  .output = 1,
+                  .crtc_mode = 1
+                }
+              }
+            }
+          },
+          .n_modes = 1,
+          .width_mm = 220,
+          .height_mm = 124
+        }
+      },
+      .n_monitors = 2,
+      /*
+       * Logical monitors expectations altered to correspond to the
+       * "suggested_x/y" changed further below.
+       */
+      .logical_monitors = {
+        {
+          .layout = { .x = 1024, .y = 758, .width = 800, .height = 600 },
+          .scale = 1
+        },
+        {
+          .layout = { .x = 0, .y = 0, .width = 1024, .height = 768 },
+          .scale = 1
+        }
+      },
+      .n_logical_monitors = 2,
+      .n_outputs = 2,
+      .n_crtcs = 2,
+      .n_tiled_monitors = 0,
+      .screen_width = 1024 + 800,
+      .screen_height = 1358
+    }
+  };
+  MetaMonitorTestSetup *test_setup;
+
+  test_setup = create_monitor_test_setup (&test_case);
+
+  test_setup->outputs[0].suggested_x = 1024;
+  test_setup->outputs[0].suggested_y = 758;
+  test_setup->outputs[1].suggested_x = 0;
+  test_setup->outputs[1].suggested_y = 0;
+
+  emulate_hotplug (test_setup);
+  check_monitor_configuration (&test_case);
+}
+
 void
 init_monitor_tests (void)
 {
@@ -1077,4 +1206,6 @@ init_monitor_tests (void)
                    meta_test_monitor_tiled_linear_config);
   g_test_add_func ("/backends/monitor/hidpi-linear-config",
                    meta_test_monitor_hidpi_linear_config);
+  g_test_add_func ("/backends/monitor/suggested-config",
+                   meta_test_monitor_suggested_config);
 }