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

device/vr/vr_device_manager_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 "device/vr/vr_device_manager.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "device/vr/test/fake_vr_device.h"
 #include "device/vr/test/fake_vr_device_provider.h"
 #include "device/vr/vr_device_provider.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace device {
 
 class VRDeviceManagerTest : public testing::Test {
  protected:
   VRDeviceManagerTest();
   ~VRDeviceManagerTest() override;
 
   void SetUp() override;
 
   bool HasServiceInstance() { return VRDeviceManager::HasInstance(); }
 
+  VRDevice* GetDevice(unsigned int index) {
+    return device_manager_->GetDevice(index);
+  }
+
  protected:
   FakeVRDeviceProvider* provider_;
   std::unique_ptr<VRDeviceManager> device_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(VRDeviceManagerTest);
 };
 
 VRDeviceManagerTest::VRDeviceManagerTest() {}
 
 VRDeviceManagerTest::~VRDeviceManagerTest() {}
@@ skipping 18 matching lines @@
 
 TEST_F(VRDeviceManagerTest, GetDevicesBasicTest) {
   mojo::Array<VRDisplayPtr> webvr_devices;
   webvr_devices = device_manager_->GetVRDevices();
   // Calling GetVRDevices should initialize the providers.
   EXPECT_TRUE(provider_->IsInitialized());
   // Should successfully return zero devices when none are available.
   EXPECT_EQ(0u, webvr_devices.size());
 
   // GetDeviceByIndex should return nullptr if an invalid index in queried.
-  VRDevice* queried_device = device_manager_->GetDevice(1);
+  VRDevice* queried_device = GetDevice(1);
   EXPECT_EQ(nullptr, queried_device);
 
   std::unique_ptr<FakeVRDevice> device1(new FakeVRDevice(provider_));
   provider_->AddDevice(device1.get());
   webvr_devices = device_manager_->GetVRDevices();
   // Should have successfully returned one device.
   EXPECT_EQ(1u, webvr_devices.size());
   // The WebVRDevice index should match the device id.
   EXPECT_EQ(webvr_devices[0]->index, device1->id());
 
   std::unique_ptr<FakeVRDevice> device2(new FakeVRDevice(provider_));
   provider_->AddDevice(device2.get());
   webvr_devices = device_manager_->GetVRDevices();
   // Should have successfully returned two devices.
   EXPECT_EQ(2u, webvr_devices.size());
   // NOTE: Returned WebVRDevices are not required to be in any particular order.
 
   // Querying the WebVRDevice index should return the correct device.
-  queried_device = device_manager_->GetDevice(device1->id());
+  queried_device = GetDevice(device1->id());
   EXPECT_EQ(device1.get(), queried_device);
-  queried_device = device_manager_->GetDevice(device2->id());
+  queried_device = GetDevice(device2->id());
   EXPECT_EQ(device2.get(), queried_device);
 
   provider_->RemoveDevice(device1.get());
   webvr_devices = device_manager_->GetVRDevices();
   // Should have successfully returned one device.
   EXPECT_EQ(1u, webvr_devices.size());
   // The WebVRDevice index should match the only remaining device id.
   EXPECT_EQ(webvr_devices[0]->index, device2->id());
 }
 
 }  // namespace device