Isolate a presenting VR device from pages other than the one presenting.

device/vr/vr_service_impl_unittest.cc

 // Copyright 2016 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 "device/vr/vr_service_impl.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "device/vr/test/fake_vr_device.h"
 #include "device/vr/test/fake_vr_device_provider.h"
 #include "device/vr/vr_device_manager.h"
 #include "device/vr/vr_service.mojom.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 using ::testing::_;
 using ::testing::Mock;
 
 namespace device {
 
 class MockVRServiceClient : public VRServiceClient {
  public:
   MOCK_METHOD1(OnDisplayChanged, void(const VRDisplay& display));
   void OnDisplayChanged(VRDisplayPtr display) override {
     OnDisplayChanged(*display);
     last_display_ = std::move(display);
   }
 
+  MOCK_METHOD1(OnExitPresent, void(uint32_t index));
+
   const VRDisplayPtr& LastDisplay() { return last_display_; }
 
  private:
   VRDisplayPtr last_display_;
 };
 
 class VRServiceTestBinding {
  public:
   VRServiceTestBinding() {
     auto request = mojo::GetProxy(&service_ptr_);
     service_impl_.reset(new VRServiceImpl());
     service_impl_->Bind(std::move(request));
 
     VRServiceClientPtr client_ptr;
     client_binding_.reset(new mojo::Binding<VRServiceClient>(
         &mock_client_, mojo::GetProxy(&client_ptr)));
     service_impl_->SetClient(std::move(client_ptr));
   }
 
   void Close() {
     service_ptr_.reset();
     service_impl_.reset();
   }
 
   MockVRServiceClient& client() { return mock_client_; }
+  VRServiceImpl* service() { return service_impl_.get(); }
 
  private:
   std::unique_ptr<VRServiceImpl> service_impl_;
   mojo::InterfacePtr<VRService> service_ptr_;
 
   MockVRServiceClient mock_client_;
   std::unique_ptr<mojo::Binding<VRServiceClient>> client_binding_;
 
   DISALLOW_COPY_AND_ASSIGN(VRServiceTestBinding);
 };
@@ skipping 11 matching lines @@
   }
 
   void TearDown() override { base::RunLoop().RunUntilIdle(); }
 
   std::unique_ptr<VRServiceTestBinding> BindService() {
     return std::unique_ptr<VRServiceTestBinding>(new VRServiceTestBinding());
   }
 
   size_t ServiceCount() { return device_manager_->services_.size(); }
 
+  bool presenting() { return !!device_manager_->presenting_service_; }
+
   base::MessageLoop message_loop_;
   FakeVRDeviceProvider* provider_;
   std::unique_ptr<VRDeviceManager> device_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(VRServiceImplTest);
 };
 
 // Ensure that services are registered with the device manager as they are
 // created and removed from the device manager as their connections are closed.
 TEST_F(VRServiceImplTest, DeviceManagerRegistration) {
@@ skipping 25 matching lines @@
   EXPECT_CALL(service_2->client(), OnDisplayChanged(_));
 
   std::unique_ptr<FakeVRDevice> device(new FakeVRDevice(provider_));
   device_manager_->OnDeviceChanged(device->GetVRDevice());
 
   base::RunLoop().RunUntilIdle();
 
   EXPECT_EQ(device->id(), service_1->client().LastDisplay()->index);
   EXPECT_EQ(device->id(), service_2->client().LastDisplay()->index);
 }
+
+// Ensure that presenting devices cannot be accessed by other services
+TEST_F(VRServiceImplTest, DevicePresentationIsolation) {
+  std::unique_ptr<VRServiceTestBinding> service_1 = BindService();
+  std::unique_ptr<VRServiceTestBinding> service_2 = BindService();
+
+  std::unique_ptr<FakeVRDevice> device(new FakeVRDevice(provider_));
+  provider_->AddDevice(device.get());
+
+  // Ensure the device manager has seen the fake device
+  device_manager_->GetVRDevices();
+
+  // When not presenting either service should be able to access the device
+  EXPECT_EQ(device.get(), VRDeviceManager::GetAllowedDevice(
+                              service_1->service(), device->id()));
+  EXPECT_EQ(device.get(), VRDeviceManager::GetAllowedDevice(
+                              service_2->service(), device->id()));
+
+  // Begin presenting to the fake device with service 1
+  EXPECT_TRUE(
+      device_manager_->RequestPresent(service_1->service(), device->id()));
+
+  EXPECT_TRUE(presenting());
+
+  // Service 2 should not be able to present to the device while service 1
+  // is still presenting.
+  EXPECT_FALSE(
+      device_manager_->RequestPresent(service_2->service(), device->id()));
+
+  // Only the presenting service should be able to access the device
+  EXPECT_EQ(device.get(), VRDeviceManager::GetAllowedDevice(
+                              service_1->service(), device->id()));
+  EXPECT_EQ(nullptr, VRDeviceManager::GetAllowedDevice(service_2->service(),
+                                                       device->id()));
+
+  // Service 2 should not be able to exit presentation to the device
+  device_manager_->ExitPresent(service_2->service(), device->id());
+  EXPECT_TRUE(presenting());
+
+  // Service 1 should be able to exit the presentation it initiated.
+  device_manager_->ExitPresent(service_1->service(), device->id());
+  EXPECT_FALSE(presenting());
+
+  // Once presention had ended both services should be able to access the device
+  EXPECT_EQ(device.get(), VRDeviceManager::GetAllowedDevice(
+                              service_1->service(), device->id()));
+  EXPECT_EQ(device.get(), VRDeviceManager::GetAllowedDevice(
+                              service_2->service(), device->id()));
 }
+}