exo: Add support for subcompositor interface.

components/exo/sub_surface_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/exo/sub_surface.h"
+#include "components/exo/surface.h"
+#include "components/exo/test/exo_test_base.h"
+#include "components/exo/test/exo_test_helper.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace exo {
+namespace {
+
+using SubSurfaceTest = test::ExoTestBase;
+
+TEST_F(SubSurfaceTest, SetPosition) {
+  scoped_ptr<Surface> parent(new Surface);
+  scoped_ptr<Surface> surface(new Surface);
+  scoped_ptr<SubSurface> sub_surface(
+      new SubSurface(surface.get(), parent.get()));
+
+  sub_surface->SetPosition(gfx::Point(10, 10));
+  parent->Commit();
+}
+
+TEST_F(SubSurfaceTest, PlaceAbove) {
+  scoped_ptr<Surface> parent(new Surface);
+  scoped_ptr<Surface> surface1(new Surface);
+  scoped_ptr<Surface> surface2(new Surface);
+  scoped_ptr<Surface> non_sibling_surface(new Surface);
+  scoped_ptr<SubSurface> sub_surface1(
+      new SubSurface(surface1.get(), parent.get()));
+  scoped_ptr<SubSurface> sub_surface2(
+      new SubSurface(surface2.get(), parent.get()));
+
+  sub_surface2->PlaceAbove(parent.get());
+  sub_surface1->PlaceAbove(non_sibling_surface.get());  // Invalid
+  sub_surface1->PlaceAbove(surface1.get());             // Invalid
+  sub_surface1->PlaceAbove(surface2.get());
+  parent->Commit();
+}
+
+TEST_F(SubSurfaceTest, PlaceBelow) {
+  scoped_ptr<Surface> parent(new Surface);
+  scoped_ptr<Surface> surface1(new Surface);
+  scoped_ptr<Surface> surface2(new Surface);
+  scoped_ptr<Surface> non_sibling_surface(new Surface);
+  scoped_ptr<SubSurface> sub_surface1(
+      new SubSurface(surface1.get(), parent.get()));
+  scoped_ptr<SubSurface> sub_surface2(
+      new SubSurface(surface2.get(), parent.get()));
+
+  sub_surface2->PlaceBelow(parent.get());               // Invalid
+  sub_surface2->PlaceBelow(non_sibling_surface.get());  // Invalid
+  sub_surface2->PlaceBelow(surface1.get());
+  sub_surface1->PlaceBelow(surface2.get());
+  parent->Commit();
+}
+
+}  // namespace
+}  // namespace exo