MediaPerceptionPrivate API impl and testing.

extensions/browser/api/media_perception_private/media_perception_api_manager_unittest.cc

Index: extensions/browser/api/media_perception_private/media_perception_api_manager_unittest.cc
diff --git a/extensions/browser/api/media_perception_private/media_perception_api_manager_unittest.cc b/extensions/browser/api/media_perception_private/media_perception_api_manager_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..47180d3e3ea980ea82ce60dd4be98efb119cdadb
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+++ b/extensions/browser/api/media_perception_private/media_perception_api_manager_unittest.cc
@@ -0,0 +1,208 @@
+// Copyright 2017 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 "extensions/browser/api/media_perception_private/media_perception_api_manager.h"
+
+#include <queue>
+
+#include "base/bind.h"
+#include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/fake_media_analytics_client.h"
+#include "chromeos/dbus/fake_upstart_client.h"
+#include "chromeos/dbus/media_analytics_client.h"
+#include "chromeos/dbus/upstart_client.h"
+#include "content/public/test/test_browser_context.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media_perception = extensions::api::media_perception_private;
+
+namespace chromeos {
+namespace {
+
+class TestUpstartClient : public FakeUpstartClient {
+ public:
+  TestUpstartClient() : enqueue_requests_(false) {}
+
+  ~TestUpstartClient() override{};
+
+  // Overrides behavior to queue start requests.
+  void StartMediaAnalytics(const UpstartCallback& callback) override {
+    pending_upstart_request_callbacks_.push(callback);
+    if (!enqueue_requests_) {
+      HandleNextUpstartRequest(true);
+      return;
+    }
+  }
+
+  // Triggers the next queue'd start request to succeed or fail.
+  bool HandleNextUpstartRequest(bool should_succeed) {
+    if (pending_upstart_request_callbacks_.empty())
+      return false;
+
+    UpstartCallback callback = pending_upstart_request_callbacks_.front();
+    pending_upstart_request_callbacks_.pop();
+
+    if (!should_succeed) {
+      callback.Run(false);
+      return true;
+    }
+
+    FakeUpstartClient::StartMediaAnalytics(callback);
+    return true;
+  }
+
+  void set_enqueue_requests(bool enqueue_requests) {
+    enqueue_requests_ = enqueue_requests;
+  }
+
+ private:
+  std::queue<UpstartCallback> pending_upstart_request_callbacks_;
+
+  bool enqueue_requests_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestUpstartClient);
+};
+
+}  // namespace
+}  // namespace chromeos
+
+namespace extensions {
+
+using CallbackStatus = MediaPerceptionAPIManager::CallbackStatus;
+
+namespace {
+
+void RecordStatusAndRunClosure(base::Closure quit_run_loop,
+                               CallbackStatus* status,
+                               CallbackStatus result_status,
+                               media_perception::State result_state) {
+  *status = result_status;
+  quit_run_loop.Run();
+}
+
+CallbackStatus SetStateAndWaitForResponse(
+    MediaPerceptionAPIManager* manager,
+    const media_perception::State& state) {
+  base::RunLoop run_loop;
+  CallbackStatus status;
+  manager->SetState(state, base::Bind(&RecordStatusAndRunClosure,
+                                      run_loop.QuitClosure(), &status));
+  run_loop.Run();
+  return status;
+}
+
+CallbackStatus GetStateAndWaitForResponse(MediaPerceptionAPIManager* manager) {
+  base::RunLoop run_loop;
+  CallbackStatus status;
+  manager->GetState(
+      base::Bind(&RecordStatusAndRunClosure, run_loop.QuitClosure(), &status));
+  run_loop.Run();
+  return status;
+}
+
+}  // namespace
+
+class MediaPerceptionAPIManagerTest : public testing::Test {
+ public:
+  MediaPerceptionAPIManagerTest()
+      : thread_bundle_(content::TestBrowserThreadBundle::DEFAULT) {}
+
+  void SetUp() override {
+    std::unique_ptr<chromeos::DBusThreadManagerSetter> dbus_setter =
+        chromeos::DBusThreadManager::GetSetterForTesting();
+    auto media_analytics_client =
+        base::MakeUnique<chromeos::FakeMediaAnalyticsClient>();
+    media_analytics_client_ = media_analytics_client.get();
+    dbus_setter->SetMediaAnalyticsClient(std::move(media_analytics_client));
+
+    auto upstart_client = base::MakeUnique<chromeos::TestUpstartClient>();
+    upstart_client_ = upstart_client.get();
+    dbus_setter->SetUpstartClient(std::move(upstart_client));
+
+    manager_ = base::MakeUnique<MediaPerceptionAPIManager>(&browser_context_);
+  }
+
+  void TearDown() override {
+    // Need to make sure that the MediaPerceptionAPIManager is destructed before
+    // the DbusThreadManager.
+    manager_.reset();
+    chromeos::DBusThreadManager::Shutdown();
+  }
+
+  std::unique_ptr<MediaPerceptionAPIManager> manager_;
+
+  // Ownership of both is passed on to chromeos::DbusThreadManager.
+  chromeos::FakeMediaAnalyticsClient* media_analytics_client_;
+  chromeos::TestUpstartClient* upstart_client_;
+
+ private:
+  content::TestBrowserContext browser_context_;
+  content::TestBrowserThreadBundle thread_bundle_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaPerceptionAPIManagerTest);
+};
+
+TEST_F(MediaPerceptionAPIManagerTest, UpstartFailure) {
+  upstart_client_->set_enqueue_requests(true);
+  media_perception::State state;
+  state.status = media_perception::STATUS_RUNNING;
+
+  base::RunLoop run_loop;
+  CallbackStatus status;
+  manager_->SetState(state, base::Bind(&RecordStatusAndRunClosure,
+                                       run_loop.QuitClosure(), &status));
+  EXPECT_TRUE(upstart_client_->HandleNextUpstartRequest(false));
+  run_loop.Run();
+  EXPECT_EQ(CallbackStatus::PROCESS_IDLE_ERROR, status);
+
+  // Check that after a failed request, setState RUNNING will go through.
+  upstart_client_->set_enqueue_requests(false);
+  EXPECT_EQ(CallbackStatus::SUCCESS,
+            SetStateAndWaitForResponse(manager_.get(), state));
+}
+
+TEST_F(MediaPerceptionAPIManagerTest, UpstartStall) {
+  upstart_client_->set_enqueue_requests(true);
+  media_perception::State state;
+  state.status = media_perception::STATUS_RUNNING;
+
+  base::RunLoop run_loop;
+  CallbackStatus status;
+  manager_->SetState(state, base::Bind(&RecordStatusAndRunClosure,
+                                       run_loop.QuitClosure(), &status));
+
+  EXPECT_EQ(CallbackStatus::PROCESS_LAUNCHING_ERROR,
+            GetStateAndWaitForResponse(manager_.get()));
+  EXPECT_EQ(CallbackStatus::PROCESS_LAUNCHING_ERROR,
+            SetStateAndWaitForResponse(manager_.get(), state));
+  EXPECT_TRUE(upstart_client_->HandleNextUpstartRequest(true));
+  run_loop.Run();
+  EXPECT_EQ(CallbackStatus::SUCCESS, status);
+
+  // Verify that after the slow start, things works as normal.
+  upstart_client_->set_enqueue_requests(false);
+  EXPECT_EQ(CallbackStatus::SUCCESS,
+            GetStateAndWaitForResponse(manager_.get()));
+  state.status = media_perception::STATUS_SUSPENDED;
+  EXPECT_EQ(CallbackStatus::SUCCESS,
+            SetStateAndWaitForResponse(manager_.get(), state));
+}
+
+TEST_F(MediaPerceptionAPIManagerTest, MediaAnalyticsDbusError) {
+  media_perception::State state;
+  state.status = media_perception::STATUS_RUNNING;
+  EXPECT_EQ(CallbackStatus::SUCCESS,
+            SetStateAndWaitForResponse(manager_.get(), state));
+  // Disable the functionality of the fake process.
+  media_analytics_client_->set_process_running(false);
+  EXPECT_EQ(CallbackStatus::DBUS_ERROR,
+            GetStateAndWaitForResponse(manager_.get()));
+  EXPECT_EQ(CallbackStatus::DBUS_ERROR,
+            SetStateAndWaitForResponse(manager_.get(), state));
+}
+
+}  // namespace extensions