Adding Chrome-side WebVR interface

content/browser/vr/vr_service_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 "base/memory/linked_ptr.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/browser/vr/test/fake_vr_device.h"
+#include "content/browser/vr/test/fake_vr_device_provider.h"
+#include "content/browser/vr/vr_device_provider.h"
+#include "content/browser/vr/vr_service.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+using blink::WebVRDevice;
+
+class VRServiceTest : public testing::Test {
+ protected:
+  VRServiceTest();
+  ~VRServiceTest() override;
+
+  void SetUp() override;
+
+  size_t ServiceConsumerCount() { return service_->consumers_.size(); }
+
+  bool HasServiceInstance() { return VRService::HasInstance(); }
+
+ protected:
+  FakeVRDeviceProvider* provider_;
+  scoped_ptr<VRService> service_;
+
+  DISALLOW_COPY_AND_ASSIGN(VRServiceTest);
+};
+
+VRServiceTest::VRServiceTest() {
+}
+
+VRServiceTest::~VRServiceTest() {
+}
+
+void VRServiceTest::SetUp() {
+  scoped_ptr<FakeVRDeviceProvider> provider(new FakeVRDeviceProvider());
+  provider_ = provider.get();
+  service_.reset(new VRService(provider.Pass()));
+}
+
+TEST_F(VRServiceTest, InitializationTest) {
+  EXPECT_FALSE(provider_->IsInitialized());
+
+  // Calling GetDevices should initialize the service if it hasn't been
+  // initialized yet or the providesr have been released.
+  // The VRService should initialize each of it's providers upon it's own
+  // initialization.
+  std::vector<blink::WebVRDevice> webvr_devices;
+  service_->GetVRDevices(&webvr_devices);
+  EXPECT_TRUE(provider_->IsInitialized());
+}
+
+TEST_F(VRServiceTest, ServiceConsumerTest) {
+  {
+    VRServiceConsumer consumer;
+
+    // Constructing a consumer should not cause the service to initialize it's
+    // providers.
+    EXPECT_FALSE(provider_->IsInitialized());
+    // Constructing a consumer does not automatically add it to the service.
+    EXPECT_EQ(0u, ServiceConsumerCount());
+
+    consumer.GetServiceInstance();
+    // Getting a service instance should not cause the service to initialize
+    // it's providers.
+    EXPECT_FALSE(provider_->IsInitialized());
+    // Getting a service instance should add the consumer to the service.
+    EXPECT_EQ(1u, ServiceConsumerCount());
+
+    std::vector<blink::WebVRDevice> webvr_devices;
+    service_->GetVRDevices(&webvr_devices);
+
+    {
+      VRServiceConsumer consumer2;
+      consumer2.GetServiceInstance();
+      EXPECT_EQ(2u, ServiceConsumerCount());
+    }
+
+    // Consumers should remove themselves from the service when destroyed.
+    EXPECT_EQ(1u, ServiceConsumerCount());
+  }
+}
+
+TEST_F(VRServiceTest, GetDevicesBasicTest) {
+  std::vector<blink::WebVRDevice> webvr_devices;
+  service_->GetVRDevices(&webvr_devices);
+  // 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 = service_->GetDevice(1);
+  EXPECT_EQ(nullptr, queried_device);
+
+  scoped_ptr<FakeVRDevice> device1(new FakeVRDevice(provider_));
+  provider_->AddDevice(device1.get());
+  service_->GetVRDevices(&webvr_devices);
+  // 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());
+
+  scoped_ptr<FakeVRDevice> device2(new FakeVRDevice(provider_));
+  provider_->AddDevice(device2.get());
+  service_->GetVRDevices(&webvr_devices);
+  // 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 = service_->GetDevice(device1->id());
+  EXPECT_EQ(device1.get(), queried_device);
+  queried_device = service_->GetDevice(device2->id());
+  EXPECT_EQ(device2.get(), queried_device);
+
+  provider_->RemoveDevice(device1.get());
+  service_->GetVRDevices(&webvr_devices);
+  // 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 content