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mojo/services/view_manager/view_manager_service_apptest.cc

+// Copyright 2014 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 "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/application/application_test_base.h"
+#include "mojo/services/view_manager/ids.h"
+#include "mojo/services/view_manager/test_change_tracker.h"
+#include "third_party/mojo_services/src/view_manager/public/interfaces/view_manager.mojom.h"
+#include "third_party/mojo_services/src/window_manager/public/interfaces/window_manager.mojom.h"
+#include "third_party/mojo_services/src/window_manager/public/interfaces/window_manager_internal.mojom.h"
+
+using mojo::ApplicationConnection;
+using mojo::ApplicationDelegate;
+using mojo::Array;
+using mojo::Callback;
+using mojo::ConnectionSpecificId;
+using mojo::ERROR_CODE_NONE;
+using mojo::ErrorCode;
+using mojo::EventPtr;
+using mojo::Id;
+using mojo::InterfaceRequest;
+using mojo::ORDER_DIRECTION_ABOVE;
+using mojo::ORDER_DIRECTION_BELOW;
+using mojo::OrderDirection;
+using mojo::RectPtr;
+using mojo::ServiceProvider;
+using mojo::ServiceProviderPtr;
+using mojo::String;
+using mojo::ViewDataPtr;
+using mojo::ViewManagerClient;
+using mojo::ViewManagerService;
+using mojo::ViewportMetricsPtr;
+
+namespace view_manager {
+
+// Creates an id used for transport from the specified parameters.
+Id BuildViewId(ConnectionSpecificId connection_id,
+               ConnectionSpecificId view_id) {
+  return (connection_id << 16) | view_id;
+}
+
+// Callback function from ViewManagerService functions. ------------------------
+
+void BoolResultCallback(base::RunLoop* run_loop,
+                        bool* result_cache,
+                        bool result) {
+  *result_cache = result;
+  run_loop->Quit();
+}
+
+void ErrorCodeResultCallback(base::RunLoop* run_loop,
+                             ErrorCode* result_cache,
+                             ErrorCode result) {
+  *result_cache = result;
+  run_loop->Quit();
+}
+
+void ViewTreeResultCallback(base::RunLoop* run_loop,
+                            std::vector<TestView>* views,
+                            Array<ViewDataPtr> results) {
+  ViewDatasToTestViews(results, views);
+  run_loop->Quit();
+}
+
+// -----------------------------------------------------------------------------
+
+// The following functions call through to the supplied ViewManagerService. They
+// block until call completes and return the result.
+bool CreateView(ViewManagerService* vm, Id view_id) {
+  ErrorCode result = ERROR_CODE_NONE;
+  base::RunLoop run_loop;
+  vm->CreateView(view_id,
+                 base::Bind(&ErrorCodeResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result == ERROR_CODE_NONE;
+}
+
+bool EmbedUrl(ViewManagerService* vm, const String& url, Id root_id) {
+  bool result = false;
+  base::RunLoop run_loop;
+  {
+    vm->EmbedUrl(url, root_id, nullptr, nullptr,
+                 base::Bind(&BoolResultCallback, &run_loop, &result));
+  }
+  run_loop.Run();
+  return result;
+}
+
+bool Embed(ViewManagerService* vm,
+           Id root_id,
+           mojo::ViewManagerClientPtr client) {
+  bool result = false;
+  base::RunLoop run_loop;
+  {
+    vm->Embed(root_id, client.Pass(),
+              base::Bind(&BoolResultCallback, &run_loop, &result));
+  }
+  run_loop.Run();
+  return result;
+}
+
+ErrorCode CreateViewWithErrorCode(ViewManagerService* vm, Id view_id) {
+  ErrorCode result = ERROR_CODE_NONE;
+  base::RunLoop run_loop;
+  vm->CreateView(view_id,
+                 base::Bind(&ErrorCodeResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+bool AddView(ViewManagerService* vm, Id parent, Id child) {
+  bool result = false;
+  base::RunLoop run_loop;
+  vm->AddView(parent, child,
+              base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+bool RemoveViewFromParent(ViewManagerService* vm, Id view_id) {
+  bool result = false;
+  base::RunLoop run_loop;
+  vm->RemoveViewFromParent(view_id,
+                           base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+bool ReorderView(ViewManagerService* vm,
+                 Id view_id,
+                 Id relative_view_id,
+                 OrderDirection direction) {
+  bool result = false;
+  base::RunLoop run_loop;
+  vm->ReorderView(view_id, relative_view_id, direction,
+                  base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+void GetViewTree(ViewManagerService* vm,
+                 Id view_id,
+                 std::vector<TestView>* views) {
+  base::RunLoop run_loop;
+  vm->GetViewTree(view_id,
+                  base::Bind(&ViewTreeResultCallback, &run_loop, views));
+  run_loop.Run();
+}
+
+bool DeleteView(ViewManagerService* vm, Id view_id) {
+  base::RunLoop run_loop;
+  bool result = false;
+  vm->DeleteView(view_id, base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+bool SetViewBounds(ViewManagerService* vm,
+                   Id view_id,
+                   int x,
+                   int y,
+                   int w,
+                   int h) {
+  base::RunLoop run_loop;
+  bool result = false;
+  RectPtr rect(mojo::Rect::New());
+  rect->x = x;
+  rect->y = y;
+  rect->width = w;
+  rect->height = h;
+  vm->SetViewBounds(view_id, rect.Pass(),
+                    base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+bool SetViewVisibility(ViewManagerService* vm, Id view_id, bool visible) {
+  base::RunLoop run_loop;
+  bool result = false;
+  vm->SetViewVisibility(view_id, visible,
+                        base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+bool SetViewProperty(ViewManagerService* vm,
+                     Id view_id,
+                     const std::string& name,
+                     const std::vector<uint8_t>* data) {
+  base::RunLoop run_loop;
+  bool result = false;
+  Array<uint8_t> mojo_data;
+  if (data)
+    mojo_data = Array<uint8_t>::From(*data);
+  vm->SetViewProperty(view_id, name, mojo_data.Pass(),
+                      base::Bind(&BoolResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result;
+}
+
+// Utility functions -----------------------------------------------------------
+
+// Waits for all messages to be received by |vm|. This is done by attempting to
+// create a bogus view. When we get the response we know all messages have been
+// processed.
+bool WaitForAllMessages(ViewManagerService* vm) {
+  ErrorCode result = ERROR_CODE_NONE;
+  base::RunLoop run_loop;
+  vm->CreateView(ViewIdToTransportId(InvalidViewId()),
+                 base::Bind(&ErrorCodeResultCallback, &run_loop, &result));
+  run_loop.Run();
+  return result != ERROR_CODE_NONE;
+}
+
+bool HasClonedView(const std::vector<TestView>& views) {
+  for (size_t i = 0; i < views.size(); ++i)
+    if (views[i].view_id == ViewIdToTransportId(ClonedViewId()))
+      return true;
+  return false;
+}
+
+// -----------------------------------------------------------------------------
+
+// A ViewManagerClient implementation that logs all changes to a tracker.
+class ViewManagerClientImpl : public mojo::ViewManagerClient,
+                              public TestChangeTracker::Delegate {
+ public:
+  ViewManagerClientImpl() : binding_(this) { tracker_.set_delegate(this); }
+
+  void Bind(mojo::InterfaceRequest<mojo::ViewManagerClient> request) {
+    binding_.Bind(request.Pass());
+  }
+
+  mojo::ViewManagerService* service() { return service_.get(); }
+  TestChangeTracker* tracker() { return &tracker_; }
+
+  // Runs a nested MessageLoop until |count| changes (calls to
+  // ViewManagerClient functions) have been received.
+  void WaitForChangeCount(size_t count) {
+    if (count == tracker_.changes()->size())
+      return;
+
+    ASSERT_TRUE(wait_state_.get() == nullptr);
+    wait_state_.reset(new WaitState);
+    wait_state_->change_count = count;
+    wait_state_->run_loop.Run();
+    wait_state_.reset();
+  }
+
+  // Runs a nested MessageLoop until OnEmbed() has been encountered.
+  void WaitForOnEmbed() {
+    if (service_)
+      return;
+    embed_run_loop_.reset(new base::RunLoop);
+    embed_run_loop_->Run();
+    embed_run_loop_.reset();
+  }
+
+  bool WaitForIncomingMethodCall() {
+    return binding_.WaitForIncomingMethodCall();
+  }
+
+ private:
+  // Used when running a nested MessageLoop.
+  struct WaitState {
+    WaitState() : change_count(0) {}
+
+    // Number of changes waiting for.
+    size_t change_count;
+    base::RunLoop run_loop;
+  };
+
+  // TestChangeTracker::Delegate:
+  void OnChangeAdded() override {
+    if (wait_state_.get() &&
+        wait_state_->change_count == tracker_.changes()->size()) {
+      wait_state_->run_loop.Quit();
+    }
+  }
+
+  // ViewManagerClient:
+  void OnEmbed(ConnectionSpecificId connection_id,
+               const String& creator_url,
+               ViewDataPtr root,
+               mojo::ViewManagerServicePtr view_manager_service,
+               InterfaceRequest<ServiceProvider> services,
+               ServiceProviderPtr exposed_services,
+               mojo::ScopedMessagePipeHandle window_manager_pipe) override {
+    service_ = view_manager_service.Pass();
+    tracker()->OnEmbed(connection_id, creator_url, root.Pass());
+    if (embed_run_loop_)
+      embed_run_loop_->Quit();
+  }
+  void OnEmbeddedAppDisconnected(Id view_id) override {
+    tracker()->OnEmbeddedAppDisconnected(view_id);
+  }
+  void OnViewBoundsChanged(Id view_id,
+                           RectPtr old_bounds,
+                           RectPtr new_bounds) override {
+    tracker()->OnViewBoundsChanged(view_id, old_bounds.Pass(),
+                                   new_bounds.Pass());
+  }
+  void OnViewViewportMetricsChanged(ViewportMetricsPtr old_metrics,
+                                    ViewportMetricsPtr new_metrics) override {
+    tracker()->OnViewViewportMetricsChanged(old_metrics.Pass(),
+                                            new_metrics.Pass());
+  }
+  void OnViewHierarchyChanged(Id view,
+                              Id new_parent,
+                              Id old_parent,
+                              Array<ViewDataPtr> views) override {
+    tracker()->OnViewHierarchyChanged(view, new_parent, old_parent,
+                                      views.Pass());
+  }
+  void OnViewReordered(Id view_id,
+                       Id relative_view_id,
+                       OrderDirection direction) override {
+    tracker()->OnViewReordered(view_id, relative_view_id, direction);
+  }
+  void OnViewDeleted(Id view) override { tracker()->OnViewDeleted(view); }
+  void OnViewVisibilityChanged(uint32_t view, bool visible) override {
+    tracker()->OnViewVisibilityChanged(view, visible);
+  }
+  void OnViewDrawnStateChanged(uint32_t view, bool drawn) override {
+    tracker()->OnViewDrawnStateChanged(view, drawn);
+  }
+  void OnViewInputEvent(Id view_id,
+                        EventPtr event,
+                        const Callback<void()>& callback) override {
+    tracker()->OnViewInputEvent(view_id, event.Pass());
+    callback.Run();
+  }
+  void OnViewSharedPropertyChanged(uint32_t view,
+                                   const String& name,
+                                   Array<uint8_t> new_data) override {
+    tracker_.OnViewSharedPropertyChanged(view, name, new_data.Pass());
+  }
+  void OnPerformAction(uint32_t view,
+                       const String& name,
+                       const Callback<void(bool)>& callback) override {}
+
+  TestChangeTracker tracker_;
+
+  mojo::ViewManagerServicePtr service_;
+
+  // If non-null we're waiting for OnEmbed() using this RunLoop.
+  scoped_ptr<base::RunLoop> embed_run_loop_;
+
+  // If non-null we're waiting for a certain number of change notifications to
+  // be encountered.
+  scoped_ptr<WaitState> wait_state_;
+
+  mojo::Binding<ViewManagerClient> binding_;
+  DISALLOW_COPY_AND_ASSIGN(ViewManagerClientImpl);
+};
+
+// -----------------------------------------------------------------------------
+
+// InterfaceFactory for vending ViewManagerClientImpls.
+class ViewManagerClientFactory
+    : public mojo::InterfaceFactory<ViewManagerClient> {
+ public:
+  ViewManagerClientFactory() {}
+  ~ViewManagerClientFactory() override {}
+
+  // Runs a nested MessageLoop until a new instance has been created.
+  scoped_ptr<ViewManagerClientImpl> WaitForInstance() {
+    if (!client_impl_.get()) {
+      DCHECK(!run_loop_.get());
+      run_loop_.reset(new base::RunLoop);
+      run_loop_->Run();
+      run_loop_.reset();
+    }
+    return client_impl_.Pass();
+  }
+
+ private:
+  // InterfaceFactory<ViewManagerClient>:
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<ViewManagerClient> request) override {
+    client_impl_.reset(new ViewManagerClientImpl);
+    client_impl_->Bind(request.Pass());
+    if (run_loop_.get())
+      run_loop_->Quit();
+  }
+
+  scoped_ptr<ViewManagerClientImpl> client_impl_;
+  scoped_ptr<base::RunLoop> run_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(ViewManagerClientFactory);
+};
+
+class ViewManagerServiceAppTest
+    : public mojo::test::ApplicationTestBase,
+      public ApplicationDelegate,
+      public mojo::InterfaceFactory<mojo::WindowManagerInternal>,
+      public mojo::WindowManagerInternal {
+ public:
+  ViewManagerServiceAppTest() : wm_internal_binding_(this) {}
+  ~ViewManagerServiceAppTest() override {}
+
+ protected:
+  // Returns the changes from the various connections.
+  std::vector<Change>* changes1() { return vm_client1_.tracker()->changes(); }
+  std::vector<Change>* changes2() { return vm_client2_->tracker()->changes(); }
+  std::vector<Change>* changes3() { return vm_client3_->tracker()->changes(); }
+
+  // Various connections. |vm1()|, being the first connection, has special
+  // permissions (it's treated as the window manager).
+  ViewManagerService* vm1() { return vm1_.get(); }
+  ViewManagerService* vm2() { return vm_client2_->service(); }
+  ViewManagerService* vm3() { return vm_client3_->service(); }
+
+  void EstablishSecondConnectionWithRoot(Id root_id) {
+    ASSERT_TRUE(vm_client2_.get() == nullptr);
+    vm_client2_ = EstablishConnectionViaEmbed(vm1(), root_id);
+    ASSERT_TRUE(vm_client2_.get() != nullptr);
+  }
+
+  void EstablishSecondConnection(bool create_initial_view) {
+    if (create_initial_view)
+      ASSERT_TRUE(CreateView(vm1_.get(), BuildViewId(1, 1)));
+    ASSERT_NO_FATAL_FAILURE(
+        EstablishSecondConnectionWithRoot(BuildViewId(1, 1)));
+
+    if (create_initial_view)
+      EXPECT_EQ("[view=1,1 parent=null]", ChangeViewDescription(*changes2()));
+  }
+
+  void EstablishThirdConnection(ViewManagerService* owner, Id root_id) {
+    ASSERT_TRUE(vm_client3_.get() == nullptr);
+    vm_client3_ = EstablishConnectionViaEmbed(owner, root_id);
+    ASSERT_TRUE(vm_client3_.get() != nullptr);
+  }
+
+  // Establishes a new connection by way of Embed() on the specified
+  // ViewManagerService.
+  scoped_ptr<ViewManagerClientImpl> EstablishConnectionViaEmbed(
+      ViewManagerService* owner,
+      Id root_id) {
+    if (!EmbedUrl(owner, application_impl()->url(), root_id)) {
+      ADD_FAILURE() << "Embed() failed";
+      return nullptr;
+    }
+    scoped_ptr<ViewManagerClientImpl> client =
+        client_factory_.WaitForInstance();
+    if (!client.get()) {
+      ADD_FAILURE() << "WaitForInstance failed";
+      return nullptr;
+    }
+    client->WaitForOnEmbed();
+
+    const std::string expected_creator =
+        owner == vm1() ? "mojo:window_manager" : application_impl()->url();
+    EXPECT_EQ("OnEmbed creator=" + expected_creator,
+              SingleChangeToDescription(*client->tracker()->changes()));
+    return client.Pass();
+  }
+
+  // ApplicationTestBase:
+  ApplicationDelegate* GetApplicationDelegate() override { return this; }
+  void SetUp() override {
+    ApplicationTestBase::SetUp();
+    ApplicationConnection* vm_connection =
+        application_impl()->ConnectToApplication("mojo:view_manager");
+    vm_connection->AddService(this);
+    vm_connection->ConnectToService(&vm1_);
+    vm_connection->ConnectToService(&wm_internal_client_);
+    // Spin a run loop until the view manager service sends us the
+    // ViewManagerClient pipe to use for the "window manager" connection.
+    view_manager_setup_run_loop_.reset(new base::RunLoop);
+    view_manager_setup_run_loop_->Run();
+    view_manager_setup_run_loop_ = nullptr;
+    // Next we should get an embed call on the "window manager" client.
+    vm_client1_.WaitForIncomingMethodCall();
+    ASSERT_EQ(1u, changes1()->size());
+    EXPECT_EQ(CHANGE_TYPE_EMBED, (*changes1())[0].type);
+    // All these tests assume 1 for the client id. The only real assertion here
+    // is the client id is not zero, but adding this as rest of code here
+    // assumes 1.
+    ASSERT_EQ(1, (*changes1())[0].connection_id);
+    changes1()->clear();
+  }
+
+  // ApplicationDelegate implementation.
+  bool ConfigureIncomingConnection(ApplicationConnection* connection) override {
+    connection->AddService(&client_factory_);
+    return true;
+  }
+
+  // mojo::InterfaceFactory<mojo::WindowManagerInternal> implementation.
+  void Create(
+      ApplicationConnection* connection,
+      mojo::InterfaceRequest<mojo::WindowManagerInternal> request) override {
+    DCHECK(!wm_internal_binding_.is_bound());
+    wm_internal_binding_.Bind(request.Pass());
+  }
+
+  // mojo::WindowManagerInternal implementation.
+  void CreateWindowManagerForViewManagerClient(
+      uint16_t connection_id,
+      mojo::ScopedMessagePipeHandle window_manager_pipe) override {}
+  void SetViewManagerClient(
+      mojo::ScopedMessagePipeHandle view_manager_client_request) override {
+    auto typed_request = mojo::MakeRequest<mojo::ViewManagerClient>(
+        view_manager_client_request.Pass());
+    vm_client1_.Bind(typed_request.Pass());
+    view_manager_setup_run_loop_->Quit();
+  }
+
+  mojo::Binding<mojo::WindowManagerInternal> wm_internal_binding_;
+  mojo::WindowManagerInternalClientPtr wm_internal_client_;
+  ViewManagerClientImpl vm_client1_;
+  scoped_ptr<ViewManagerClientImpl> vm_client2_;
+  scoped_ptr<ViewManagerClientImpl> vm_client3_;
+
+ private:
+  mojo::ViewManagerServicePtr vm1_;
+  ViewManagerClientFactory client_factory_;
+  scoped_ptr<base::RunLoop> view_manager_setup_run_loop_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(ViewManagerServiceAppTest);
+};
+
+// Verifies two clients/connections get different ids.
+TEST_F(ViewManagerServiceAppTest, TwoClientsGetDifferentConnectionIds) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  // It isn't strictly necessary that the second connection gets 2, but these
+  // tests are written assuming that is the case. The key thing is the
+  // connection ids of |connection_| and |connection2_| differ.
+  ASSERT_EQ(1u, changes2()->size());
+  ASSERT_EQ(2, (*changes2())[0].connection_id);
+}
+
+// Verifies when Embed() is invoked any child views are removed.
+TEST_F(ViewManagerServiceAppTest, ViewsRemovedWhenEmbedding) {
+  // Two views 1 and 2. 2 is parented to 1.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 1), BuildViewId(1, 2)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(false));
+  EXPECT_EQ("[view=1,1 parent=null]", ChangeViewDescription(*changes2()));
+
+  // Embed() removed view 2.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(1, 2), &views);
+    EXPECT_EQ("view=1,2 parent=null", SingleViewDescription(views));
+  }
+
+  // vm2 should not see view 2.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(1, 1), &views);
+    EXPECT_EQ("view=1,1 parent=null", SingleViewDescription(views));
+  }
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(1, 2), &views);
+    EXPECT_TRUE(views.empty());
+  }
+
+  // Views 3 and 4 in connection 2.
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 3)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 4)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(2, 3), BuildViewId(2, 4)));
+
+  // Connection 3 rooted at 2.
+  ASSERT_NO_FATAL_FAILURE(EstablishThirdConnection(vm2(), BuildViewId(2, 3)));
+
+  // View 4 should no longer have a parent.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(2, 3), &views);
+    EXPECT_EQ("view=2,3 parent=null", SingleViewDescription(views));
+
+    views.clear();
+    GetViewTree(vm2(), BuildViewId(2, 4), &views);
+    EXPECT_EQ("view=2,4 parent=null", SingleViewDescription(views));
+  }
+
+  // And view 4 should not be visible to connection 3.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm3(), BuildViewId(2, 3), &views);
+    EXPECT_EQ("view=2,3 parent=null", SingleViewDescription(views));
+  }
+}
+
+// Verifies once Embed() has been invoked the parent connection can't see any
+// children.
+TEST_F(ViewManagerServiceAppTest, CantAccessChildrenOfEmbeddedView) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishThirdConnection(vm2(), BuildViewId(2, 2)));
+
+  ASSERT_TRUE(CreateView(vm3(), BuildViewId(3, 3)));
+  ASSERT_TRUE(AddView(vm3(), BuildViewId(2, 2), BuildViewId(3, 3)));
+
+  // Even though 3 is a child of 2 connection 2 can't see 3 as it's from a
+  // different connection.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(2, 2), &views);
+    EXPECT_EQ("view=2,2 parent=1,1", SingleViewDescription(views));
+  }
+
+  // Connection 2 shouldn't be able to get view 3 at all.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(3, 3), &views);
+    EXPECT_TRUE(views.empty());
+  }
+
+  // Connection 1 should be able to see it all (its the root).
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(1, 1), &views);
+    ASSERT_EQ(3u, views.size());
+    EXPECT_EQ("view=1,1 parent=null", views[0].ToString());
+    EXPECT_EQ("view=2,2 parent=1,1", views[1].ToString());
+    EXPECT_EQ("view=3,3 parent=2,2", views[2].ToString());
+  }
+}
+
+// Verifies once Embed() has been invoked the parent can't mutate the children.
+TEST_F(ViewManagerServiceAppTest, CantModifyChildrenOfEmbeddedView) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishThirdConnection(vm2(), BuildViewId(2, 2)));
+
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 3)));
+  // Connection 2 shouldn't be able to add anything to the view anymore.
+  ASSERT_FALSE(AddView(vm2(), BuildViewId(2, 2), BuildViewId(2, 3)));
+
+  // Create view 3 in connection 3 and add it to view 3.
+  ASSERT_TRUE(CreateView(vm3(), BuildViewId(3, 3)));
+  ASSERT_TRUE(AddView(vm3(), BuildViewId(2, 2), BuildViewId(3, 3)));
+
+  // Connection 2 shouldn't be able to remove view 3.
+  ASSERT_FALSE(RemoveViewFromParent(vm2(), BuildViewId(3, 3)));
+}
+
+// Verifies client gets a valid id.
+TEST_F(ViewManagerServiceAppTest, CreateView) {
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  EXPECT_TRUE(changes1()->empty());
+
+  // Can't create a view with the same id.
+  ASSERT_EQ(mojo::ERROR_CODE_VALUE_IN_USE,
+            CreateViewWithErrorCode(vm1(), BuildViewId(1, 1)));
+  EXPECT_TRUE(changes1()->empty());
+
+  // Can't create a view with a bogus connection id.
+  EXPECT_EQ(mojo::ERROR_CODE_ILLEGAL_ARGUMENT,
+            CreateViewWithErrorCode(vm1(), BuildViewId(2, 1)));
+  EXPECT_TRUE(changes1()->empty());
+}
+
+// Verifies AddView fails when view is already in position.
+TEST_F(ViewManagerServiceAppTest, AddViewWithNoChange) {
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 3)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  // Make 3 a child of 2.
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 2), BuildViewId(1, 3)));
+
+  // Try again, this should fail.
+  EXPECT_FALSE(AddView(vm1(), BuildViewId(1, 2), BuildViewId(1, 3)));
+}
+
+// Verifies AddView fails when view is already in position.
+TEST_F(ViewManagerServiceAppTest, AddAncestorFails) {
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 3)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  // Make 3 a child of 2.
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 2), BuildViewId(1, 3)));
+
+  // Try to make 2 a child of 3, this should fail since 2 is an ancestor of 3.
+  EXPECT_FALSE(AddView(vm1(), BuildViewId(1, 3), BuildViewId(1, 2)));
+}
+
+// Verifies adding to root sends right notifications.
+TEST_F(ViewManagerServiceAppTest, AddToRoot) {
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 21)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 3)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  changes2()->clear();
+
+  // Make 3 a child of 21.
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 21), BuildViewId(1, 3)));
+
+  // Make 21 a child of 1.
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 1), BuildViewId(1, 21)));
+
+  // Connection 2 should not be told anything (because the view is from a
+  // different connection). Create a view to ensure we got a response from
+  // the server.
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 100)));
+  EXPECT_TRUE(changes2()->empty());
+}
+
+// Verifies HierarchyChanged is correctly sent for various adds/removes.
+TEST_F(ViewManagerServiceAppTest, ViewHierarchyChangedViews) {
+  // 1,2->1,11.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 2), true));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 11)));
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 11), true));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 2), BuildViewId(1, 11)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 1), true));
+
+  ASSERT_TRUE(WaitForAllMessages(vm2()));
+  changes2()->clear();
+
+  // 1,1->1,2->1,11
+  {
+    // Client 2 should not get anything (1,2 is from another connection).
+    ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 1), BuildViewId(1, 2)));
+    ASSERT_TRUE(WaitForAllMessages(vm2()));
+    EXPECT_TRUE(changes2()->empty());
+  }
+
+  // 0,1->1,1->1,2->1,11.
+  {
+    // Client 2 is now connected to the root, so it should have gotten a drawn
+    // notification.
+    ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+    vm_client2_->WaitForChangeCount(1u);
+    EXPECT_EQ("DrawnStateChanged view=1,1 drawn=true",
+              SingleChangeToDescription(*changes2()));
+  }
+
+  // 1,1->1,2->1,11.
+  {
+    // Client 2 is no longer connected to the root, should get drawn state
+    // changed.
+    changes2()->clear();
+    ASSERT_TRUE(RemoveViewFromParent(vm1(), BuildViewId(1, 1)));
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("DrawnStateChanged view=1,1 drawn=false",
+              SingleChangeToDescription(*changes2()));
+  }
+
+  // 1,1->1,2->1,11->1,111.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 111)));
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 111), true));
+  {
+    changes2()->clear();
+    ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 11), BuildViewId(1, 111)));
+    ASSERT_TRUE(WaitForAllMessages(vm2()));
+    EXPECT_TRUE(changes2()->empty());
+  }
+
+  // 0,1->1,1->1,2->1,11->1,111
+  {
+    changes2()->clear();
+    ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("DrawnStateChanged view=1,1 drawn=true",
+              SingleChangeToDescription(*changes2()));
+  }
+}
+
+TEST_F(ViewManagerServiceAppTest, ViewHierarchyChangedAddingKnownToUnknown) {
+  // Create the following structure: root -> 1 -> 11 and 2->21 (2 has no
+  // parent).
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 11)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 21)));
+
+  // Set up the hierarchy.
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 11)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(2, 2), BuildViewId(2, 21)));
+
+  // Remove 11, should result in a hierarchy change for the root.
+  {
+    changes1()->clear();
+    ASSERT_TRUE(RemoveViewFromParent(vm2(), BuildViewId(2, 11)));
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("HierarchyChanged view=2,11 new_parent=null old_parent=1,1",
+              SingleChangeToDescription(*changes1()));
+  }
+
+  // Add 2 to 1.
+  {
+    changes1()->clear();
+    ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("HierarchyChanged view=2,2 new_parent=1,1 old_parent=null",
+              SingleChangeToDescription(*changes1()));
+    EXPECT_EQ(
+        "[view=2,2 parent=1,1],"
+        "[view=2,21 parent=2,2]",
+        ChangeViewDescription(*changes1()));
+  }
+}
+
+TEST_F(ViewManagerServiceAppTest, ReorderView) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  Id view1_id = BuildViewId(2, 1);
+  Id view2_id = BuildViewId(2, 2);
+  Id view3_id = BuildViewId(2, 3);
+  Id view4_id = BuildViewId(1, 4);  // Peer to 1,1
+  Id view5_id = BuildViewId(1, 5);  // Peer to 1,1
+  Id view6_id = BuildViewId(2, 6);  // Child of 1,2.
+  Id view7_id = BuildViewId(2, 7);  // Unparented.
+  Id view8_id = BuildViewId(2, 8);  // Unparented.
+  ASSERT_TRUE(CreateView(vm2(), view1_id));
+  ASSERT_TRUE(CreateView(vm2(), view2_id));
+  ASSERT_TRUE(CreateView(vm2(), view3_id));
+  ASSERT_TRUE(CreateView(vm1(), view4_id));
+  ASSERT_TRUE(CreateView(vm1(), view5_id));
+  ASSERT_TRUE(CreateView(vm2(), view6_id));
+  ASSERT_TRUE(CreateView(vm2(), view7_id));
+  ASSERT_TRUE(CreateView(vm2(), view8_id));
+  ASSERT_TRUE(AddView(vm2(), view1_id, view2_id));
+  ASSERT_TRUE(AddView(vm2(), view2_id, view6_id));
+  ASSERT_TRUE(AddView(vm2(), view1_id, view3_id));
+  ASSERT_TRUE(AddView(vm1(), ViewIdToTransportId(RootViewId()), view4_id));
+  ASSERT_TRUE(AddView(vm1(), ViewIdToTransportId(RootViewId()), view5_id));
+  ASSERT_TRUE(AddView(vm1(), ViewIdToTransportId(RootViewId()), view1_id));
+
+  {
+    changes1()->clear();
+    ASSERT_TRUE(ReorderView(vm2(), view2_id, view3_id, ORDER_DIRECTION_ABOVE));
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("Reordered view=2,2 relative=2,3 direction=above",
+              SingleChangeToDescription(*changes1()));
+  }
+
+  {
+    changes1()->clear();
+    ASSERT_TRUE(ReorderView(vm2(), view2_id, view3_id, ORDER_DIRECTION_BELOW));
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("Reordered view=2,2 relative=2,3 direction=below",
+              SingleChangeToDescription(*changes1()));
+  }
+
+  // view2 is already below view3.
+  EXPECT_FALSE(ReorderView(vm2(), view2_id, view3_id, ORDER_DIRECTION_BELOW));
+
+  // view4 & 5 are unknown to connection2_.
+  EXPECT_FALSE(ReorderView(vm2(), view4_id, view5_id, ORDER_DIRECTION_ABOVE));
+
+  // view6 & view3 have different parents.
+  EXPECT_FALSE(ReorderView(vm1(), view3_id, view6_id, ORDER_DIRECTION_ABOVE));
+
+  // Non-existent view-ids
+  EXPECT_FALSE(ReorderView(vm1(), BuildViewId(1, 27), BuildViewId(1, 28),
+                           ORDER_DIRECTION_ABOVE));
+
+  // view7 & view8 are un-parented.
+  EXPECT_FALSE(ReorderView(vm1(), view7_id, view8_id, ORDER_DIRECTION_ABOVE));
+}
+
+// Verifies DeleteView works.
+TEST_F(ViewManagerServiceAppTest, DeleteView) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+
+  // Make 2 a child of 1.
+  {
+    changes1()->clear();
+    ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("HierarchyChanged view=2,2 new_parent=1,1 old_parent=null",
+              SingleChangeToDescription(*changes1()));
+  }
+
+  // Delete 2.
+  {
+    changes1()->clear();
+    changes2()->clear();
+    ASSERT_TRUE(DeleteView(vm2(), BuildViewId(2, 2)));
+    EXPECT_TRUE(changes2()->empty());
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("ViewDeleted view=2,2", SingleChangeToDescription(*changes1()));
+  }
+}
+
+// Verifies DeleteView isn't allowed from a separate connection.
+TEST_F(ViewManagerServiceAppTest, DeleteViewFromAnotherConnectionDisallowed) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  EXPECT_FALSE(DeleteView(vm2(), BuildViewId(1, 1)));
+}
+
+// Verifies if a view was deleted and then reused that other clients are
+// properly notified.
+TEST_F(ViewManagerServiceAppTest, ReuseDeletedViewId) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+
+  // Add 2 to 1.
+  {
+    changes1()->clear();
+    ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("HierarchyChanged view=2,2 new_parent=1,1 old_parent=null",
+              SingleChangeToDescription(*changes1()));
+    EXPECT_EQ("[view=2,2 parent=1,1]", ChangeViewDescription(*changes1()));
+  }
+
+  // Delete 2.
+  {
+    changes1()->clear();
+    ASSERT_TRUE(DeleteView(vm2(), BuildViewId(2, 2)));
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("ViewDeleted view=2,2", SingleChangeToDescription(*changes1()));
+  }
+
+  // Create 2 again, and add it back to 1. Should get the same notification.
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  {
+    changes1()->clear();
+    ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("HierarchyChanged view=2,2 new_parent=1,1 old_parent=null",
+              SingleChangeToDescription(*changes1()));
+    EXPECT_EQ("[view=2,2 parent=1,1]", ChangeViewDescription(*changes1()));
+  }
+}
+
+// Assertions for GetViewTree.
+TEST_F(ViewManagerServiceAppTest, GetViewTree) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+
+  // Create 11 in first connection and make it a child of 1.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 11)));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 1), BuildViewId(1, 11)));
+
+  // Create two views in second connection, 2 and 3, both children of 1.
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 3)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 3)));
+
+  // Verifies GetViewTree() on the root. The root connection sees all.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(0, 1), &views);
+    ASSERT_EQ(5u, views.size());
+    EXPECT_EQ("view=0,1 parent=null", views[0].ToString());
+    EXPECT_EQ("view=1,1 parent=0,1", views[1].ToString());
+    EXPECT_EQ("view=1,11 parent=1,1", views[2].ToString());
+    EXPECT_EQ("view=2,2 parent=1,1", views[3].ToString());
+    EXPECT_EQ("view=2,3 parent=1,1", views[4].ToString());
+  }
+
+  // Verifies GetViewTree() on the view 1,1 from vm2(). vm2() sees 1,1 as 1,1
+  // is vm2()'s root and vm2() sees all the views it created.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(1, 1), &views);
+    ASSERT_EQ(3u, views.size());
+    EXPECT_EQ("view=1,1 parent=null", views[0].ToString());
+    EXPECT_EQ("view=2,2 parent=1,1", views[1].ToString());
+    EXPECT_EQ("view=2,3 parent=1,1", views[2].ToString());
+  }
+
+  // Connection 2 shouldn't be able to get the root tree.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(0, 1), &views);
+    ASSERT_EQ(0u, views.size());
+  }
+}
+
+TEST_F(ViewManagerServiceAppTest, SetViewBounds) {
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(false));
+
+  changes2()->clear();
+  ASSERT_TRUE(SetViewBounds(vm1(), BuildViewId(1, 1), 0, 0, 100, 100));
+
+  vm_client2_->WaitForChangeCount(1);
+  EXPECT_EQ("BoundsChanged view=1,1 old_bounds=0,0 0x0 new_bounds=0,0 100x100",
+            SingleChangeToDescription(*changes2()));
+
+  // Should not be possible to change the bounds of a view created by another
+  // connection.
+  ASSERT_FALSE(SetViewBounds(vm2(), BuildViewId(1, 1), 0, 0, 0, 0));
+}
+
+// Verify AddView fails when trying to manipulate views in other roots.
+TEST_F(ViewManagerServiceAppTest, CantMoveViewsFromOtherRoot) {
+  // Create 1 and 2 in the first connection.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(false));
+
+  // Try to move 2 to be a child of 1 from connection 2. This should fail as 2
+  // should not be able to access 1.
+  ASSERT_FALSE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(1, 2)));
+
+  // Try to reparent 1 to the root. A connection is not allowed to reparent its
+  // roots.
+  ASSERT_FALSE(AddView(vm2(), BuildViewId(0, 1), BuildViewId(1, 1)));
+}
+
+// Verify RemoveViewFromParent fails for views that are descendants of the
+// roots.
+TEST_F(ViewManagerServiceAppTest, CantRemoveViewsInOtherRoots) {
+  // Create 1 and 2 in the first connection and parent both to the root.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 2)));
+
+  // Establish the second connection and give it the root 1.
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(false));
+
+  // Connection 2 should not be able to remove view 2 or 1 from its parent.
+  ASSERT_FALSE(RemoveViewFromParent(vm2(), BuildViewId(1, 2)));
+  ASSERT_FALSE(RemoveViewFromParent(vm2(), BuildViewId(1, 1)));
+
+  // Create views 10 and 11 in 2.
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 10)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 11)));
+
+  // Parent 11 to 10.
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(2, 10), BuildViewId(2, 11)));
+  // Remove 11 from 10.
+  ASSERT_TRUE(RemoveViewFromParent(vm2(), BuildViewId(2, 11)));
+
+  // Verify nothing was actually removed.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(0, 1), &views);
+    ASSERT_EQ(3u, views.size());
+    EXPECT_EQ("view=0,1 parent=null", views[0].ToString());
+    EXPECT_EQ("view=1,1 parent=0,1", views[1].ToString());
+    EXPECT_EQ("view=1,2 parent=0,1", views[2].ToString());
+  }
+}
+
+// Verify GetViewTree fails for views that are not descendants of the roots.
+TEST_F(ViewManagerServiceAppTest, CantGetViewTreeOfOtherRoots) {
+  // Create 1 and 2 in the first connection and parent both to the root.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 2)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(false));
+
+  std::vector<TestView> views;
+
+  // Should get nothing for the root.
+  GetViewTree(vm2(), BuildViewId(0, 1), &views);
+  ASSERT_TRUE(views.empty());
+
+  // Should get nothing for view 2.
+  GetViewTree(vm2(), BuildViewId(1, 2), &views);
+  ASSERT_TRUE(views.empty());
+
+  // Should get view 1 if asked for.
+  GetViewTree(vm2(), BuildViewId(1, 1), &views);
+  ASSERT_EQ(1u, views.size());
+  EXPECT_EQ("view=1,1 parent=null", views[0].ToString());
+}
+
+TEST_F(ViewManagerServiceAppTest, OnViewInputEvent) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  changes2()->clear();
+
+  // Dispatch an event to the view and verify it's received.
+  {
+    EventPtr event(mojo::Event::New());
+    event->action = static_cast<mojo::EventType>(1);
+    wm_internal_client_->DispatchInputEventToView(BuildViewId(1, 1),
+                                                  event.Pass());
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("InputEvent view=1,1 event_action=1",
+              SingleChangeToDescription(*changes2()));
+  }
+}
+
+TEST_F(ViewManagerServiceAppTest, EmbedWithSameViewId) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  changes2()->clear();
+
+  ASSERT_NO_FATAL_FAILURE(EstablishThirdConnection(vm1(), BuildViewId(1, 1)));
+
+  // Connection2 should have been told the view was deleted.
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("ViewDeleted view=1,1", SingleChangeToDescription(*changes2()));
+  }
+
+  // Connection2 has no root. Verify it can't see view 1,1 anymore.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm2(), BuildViewId(1, 1), &views);
+    EXPECT_TRUE(views.empty());
+  }
+}
+
+TEST_F(ViewManagerServiceAppTest, EmbedWithSameViewId2) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  changes2()->clear();
+
+  ASSERT_NO_FATAL_FAILURE(EstablishThirdConnection(vm1(), BuildViewId(1, 1)));
+
+  // Connection2 should have been told the view was deleted.
+  vm_client2_->WaitForChangeCount(1);
+  changes2()->clear();
+
+  // Create a view in the third connection and parent it to the root.
+  ASSERT_TRUE(CreateView(vm3(), BuildViewId(3, 1)));
+  ASSERT_TRUE(AddView(vm3(), BuildViewId(1, 1), BuildViewId(3, 1)));
+
+  // Connection 1 should have been told about the add (it owns the view).
+  {
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("HierarchyChanged view=3,1 new_parent=1,1 old_parent=null",
+              SingleChangeToDescription(*changes1()));
+  }
+
+  // Embed 1,1 again.
+  {
+    changes3()->clear();
+
+    // We should get a new connection for the new embedding.
+    scoped_ptr<ViewManagerClientImpl> connection4(
+        EstablishConnectionViaEmbed(vm1(), BuildViewId(1, 1)));
+    ASSERT_TRUE(connection4.get());
+    EXPECT_EQ("[view=1,1 parent=null]",
+              ChangeViewDescription(*connection4->tracker()->changes()));
+
+    // And 3 should get a delete.
+    vm_client3_->WaitForChangeCount(1);
+    EXPECT_EQ("ViewDeleted view=1,1", SingleChangeToDescription(*changes3()));
+  }
+
+  // vm3() has no root. Verify it can't see view 1,1 anymore.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm3(), BuildViewId(1, 1), &views);
+    EXPECT_TRUE(views.empty());
+  }
+
+  // Verify 3,1 is no longer parented to 1,1. We have to do this from 1,1 as
+  // vm3() can no longer see 1,1.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(1, 1), &views);
+    ASSERT_EQ(1u, views.size());
+    EXPECT_EQ("view=1,1 parent=null", views[0].ToString());
+  }
+
+  // Verify vm3() can still see the view it created 3,1.
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm3(), BuildViewId(3, 1), &views);
+    ASSERT_EQ(1u, views.size());
+    EXPECT_EQ("view=3,1 parent=null", views[0].ToString());
+  }
+}
+
+// Assertions for SetViewVisibility.
+TEST_F(ViewManagerServiceAppTest, SetViewVisibility) {
+  // Create 1 and 2 in the first connection and parent both to the root.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(0, 1), &views);
+    ASSERT_EQ(2u, views.size());
+    EXPECT_EQ("view=0,1 parent=null visible=true drawn=true",
+              views[0].ToString2());
+    EXPECT_EQ("view=1,1 parent=0,1 visible=false drawn=false",
+              views[1].ToString2());
+  }
+
+  // Show all the views.
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 1), true));
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 2), true));
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(0, 1), &views);
+    ASSERT_EQ(2u, views.size());
+    EXPECT_EQ("view=0,1 parent=null visible=true drawn=true",
+              views[0].ToString2());
+    EXPECT_EQ("view=1,1 parent=0,1 visible=true drawn=true",
+              views[1].ToString2());
+  }
+
+  // Hide 1.
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 1), false));
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(1, 1), &views);
+    ASSERT_EQ(1u, views.size());
+    EXPECT_EQ("view=1,1 parent=0,1 visible=false drawn=false",
+              views[0].ToString2());
+  }
+
+  // Attach 2 to 1.
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 1), BuildViewId(1, 2)));
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(1, 1), &views);
+    ASSERT_EQ(2u, views.size());
+    EXPECT_EQ("view=1,1 parent=0,1 visible=false drawn=false",
+              views[0].ToString2());
+    EXPECT_EQ("view=1,2 parent=1,1 visible=true drawn=false",
+              views[1].ToString2());
+  }
+
+  // Show 1.
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 1), true));
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(1, 1), &views);
+    ASSERT_EQ(2u, views.size());
+    EXPECT_EQ("view=1,1 parent=0,1 visible=true drawn=true",
+              views[0].ToString2());
+    EXPECT_EQ("view=1,2 parent=1,1 visible=true drawn=true",
+              views[1].ToString2());
+  }
+}
+
+// Assertions for SetViewVisibility sending notifications.
+TEST_F(ViewManagerServiceAppTest, SetViewVisibilityNotifications) {
+  // Create 1,1 and 1,2. 1,2 is made a child of 1,1 and 1,1 a child of the root.
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 1), true));
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 2)));
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 2), true));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(1, 1), BuildViewId(1, 2)));
+
+  // Establish the second connection at 1,2.
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnectionWithRoot(BuildViewId(1, 2)));
+
+  // Add 2,3 as a child of 1,2.
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 3)));
+  ASSERT_TRUE(SetViewVisibility(vm2(), BuildViewId(2, 3), true));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 2), BuildViewId(2, 3)));
+  WaitForAllMessages(vm1());
+
+  changes2()->clear();
+  // Hide 1,2 from connection 1. Connection 2 should see this.
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 2), false));
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("VisibilityChanged view=1,2 visible=false",
+              SingleChangeToDescription(*changes2()));
+  }
+
+  changes1()->clear();
+  // Show 1,2 from connection 2, connection 1 should be notified.
+  ASSERT_TRUE(SetViewVisibility(vm2(), BuildViewId(1, 2), true));
+  {
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("VisibilityChanged view=1,2 visible=true",
+              SingleChangeToDescription(*changes1()));
+  }
+
+  changes2()->clear();
+  // Hide 1,1, connection 2 should be told the draw state changed.
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 1), false));
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("DrawnStateChanged view=1,2 drawn=false",
+              SingleChangeToDescription(*changes2()));
+  }
+
+  changes2()->clear();
+  // Show 1,1 from connection 1. Connection 2 should see this.
+  ASSERT_TRUE(SetViewVisibility(vm1(), BuildViewId(1, 1), true));
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("DrawnStateChanged view=1,2 drawn=true",
+              SingleChangeToDescription(*changes2()));
+  }
+
+  // Change visibility of 2,3, connection 1 should see this.
+  changes1()->clear();
+  ASSERT_TRUE(SetViewVisibility(vm2(), BuildViewId(2, 3), false));
+  {
+    vm_client1_.WaitForChangeCount(1);
+    EXPECT_EQ("VisibilityChanged view=2,3 visible=false",
+              SingleChangeToDescription(*changes1()));
+  }
+
+  changes2()->clear();
+  // Remove 1,1 from the root, connection 2 should see drawn state changed.
+  ASSERT_TRUE(RemoveViewFromParent(vm1(), BuildViewId(1, 1)));
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("DrawnStateChanged view=1,2 drawn=false",
+              SingleChangeToDescription(*changes2()));
+  }
+
+  changes2()->clear();
+  // Add 1,1 back to the root, connection 2 should see drawn state changed.
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("DrawnStateChanged view=1,2 drawn=true",
+              SingleChangeToDescription(*changes2()));
+  }
+}
+
+TEST_F(ViewManagerServiceAppTest, SetViewProperty) {
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(false));
+  changes2()->clear();
+
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(0, 1), &views);
+    ASSERT_EQ(2u, views.size());
+    EXPECT_EQ(BuildViewId(0, 1), views[0].view_id);
+    EXPECT_EQ(BuildViewId(1, 1), views[1].view_id);
+    ASSERT_EQ(0u, views[1].properties.size());
+  }
+
+  // Set properties on 1.
+  changes2()->clear();
+  std::vector<uint8_t> one(1, '1');
+  ASSERT_TRUE(SetViewProperty(vm1(), BuildViewId(1, 1), "one", &one));
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("PropertyChanged view=1,1 key=one value=1",
+              SingleChangeToDescription(*changes2()));
+  }
+
+  // Test that our properties exist in the view tree
+  {
+    std::vector<TestView> views;
+    GetViewTree(vm1(), BuildViewId(1, 1), &views);
+    ASSERT_EQ(1u, views.size());
+    ASSERT_EQ(1u, views[0].properties.size());
+    EXPECT_EQ(one, views[0].properties["one"]);
+  }
+
+  changes2()->clear();
+  // Set back to null.
+  ASSERT_TRUE(SetViewProperty(vm1(), BuildViewId(1, 1), "one", NULL));
+  {
+    vm_client2_->WaitForChangeCount(1);
+    EXPECT_EQ("PropertyChanged view=1,1 key=one value=NULL",
+              SingleChangeToDescription(*changes2()));
+  }
+}
+
+TEST_F(ViewManagerServiceAppTest, OnEmbeddedAppDisconnected) {
+  // Create connection 2 and 3.
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+  changes2()->clear();
+  ASSERT_NO_FATAL_FAILURE(EstablishThirdConnection(vm2(), BuildViewId(2, 2)));
+
+  // Close connection 3. Connection 2 (which had previously embedded 3) should
+  // be notified of this.
+  vm_client3_.reset();
+  vm_client2_->WaitForChangeCount(1);
+  EXPECT_EQ("OnEmbeddedAppDisconnected view=2,2",
+            SingleChangeToDescription(*changes2()));
+}
+
+// Verifies when the parent of an Embed() is destroyed the embedded app gets
+// a ViewDeleted (and doesn't trigger a DCHECK).
+TEST_F(ViewManagerServiceAppTest, OnParentOfEmbedDisconnects) {
+  // Create connection 2 and 3.
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 3)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(2, 2), BuildViewId(2, 3)));
+  changes2()->clear();
+  ASSERT_NO_FATAL_FAILURE(EstablishThirdConnection(vm2(), BuildViewId(2, 3)));
+  changes3()->clear();
+
+  // Close connection 2. Connection 3 should get a delete (for its root).
+  vm_client2_.reset();
+  vm_client3_->WaitForChangeCount(1);
+  EXPECT_EQ("ViewDeleted view=2,3", SingleChangeToDescription(*changes3()));
+}
+
+// Verifies ViewManagerServiceImpl doesn't incorrectly erase from its internal
+// map when a view from another connection with the same view_id is removed.
+TEST_F(ViewManagerServiceAppTest, DontCleanMapOnDestroy) {
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 1)));
+  changes1()->clear();
+  vm_client2_.reset();
+  vm_client1_.WaitForChangeCount(1);
+  EXPECT_EQ("OnEmbeddedAppDisconnected view=1,1",
+            SingleChangeToDescription(*changes1()));
+  std::vector<TestView> views;
+  GetViewTree(vm1(), BuildViewId(1, 1), &views);
+  EXPECT_FALSE(views.empty());
+}
+
+TEST_F(ViewManagerServiceAppTest, CloneAndAnimate) {
+  // Create connection 2 and 3.
+  ASSERT_NO_FATAL_FAILURE(EstablishSecondConnection(true));
+  ASSERT_TRUE(AddView(vm1(), BuildViewId(0, 1), BuildViewId(1, 1)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 2)));
+  ASSERT_TRUE(CreateView(vm2(), BuildViewId(2, 3)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(1, 1), BuildViewId(2, 2)));
+  ASSERT_TRUE(AddView(vm2(), BuildViewId(2, 2), BuildViewId(2, 3)));
+  changes2()->clear();
+
+  ASSERT_TRUE(WaitForAllMessages(vm1()));
+  changes1()->clear();
+
+  wm_internal_client_->CloneAndAnimate(BuildViewId(2, 3));
+  ASSERT_TRUE(WaitForAllMessages(vm1()));
+
+  ASSERT_TRUE(WaitForAllMessages(vm1()));
+  ASSERT_TRUE(WaitForAllMessages(vm2()));
+
+  // No messages should have been received.
+  EXPECT_TRUE(changes1()->empty());
+  EXPECT_TRUE(changes2()->empty());
+
+  // No one should be able to see the cloned tree.
+  std::vector<TestView> views;
+  GetViewTree(vm1(), BuildViewId(1, 1), &views);
+  EXPECT_FALSE(HasClonedView(views));
+  views.clear();
+
+  GetViewTree(vm2(), BuildViewId(1, 1), &views);
+  EXPECT_FALSE(HasClonedView(views));
+}
+
+// Verifies Embed() works when supplying a ViewManagerClient.
+TEST_F(ViewManagerServiceAppTest, EmbedSupplyingViewManagerClient) {
+  ASSERT_TRUE(CreateView(vm1(), BuildViewId(1, 1)));
+
+  ViewManagerClientImpl client2;
+  mojo::ViewManagerClientPtr client2_ptr;
+  mojo::Binding<ViewManagerClient> client2_binding(&client2, &client2_ptr);
+  ASSERT_TRUE(Embed(vm1(), BuildViewId(1, 1), client2_ptr.Pass()));
+  client2.WaitForOnEmbed();
+  EXPECT_EQ("OnEmbed creator=mojo:window_manager",
+            SingleChangeToDescription(*client2.tracker()->changes()));
+}
+
+// TODO(sky): need to better track changes to initial connection. For example,
+// that SetBounsdViews/AddView and the like don't result in messages to the
+// originating connection.
+
+// TODO(sky): make sure coverage of what was
+// ViewManagerTest.SecondEmbedRoot_InitService and
+// ViewManagerTest.MultipleEmbedRootsBeforeWTHReady gets added to window manager
+// tests.
+
+}  // namespace view_manager