ServiceWorker: Introduce SWMessageSender in order to mock IPC messaging

content/child/service_worker/service_worker_dispatcher_unittest.cc

Index: content/child/service_worker/service_worker_dispatcher_unittest.cc
diff --git a/content/child/service_worker/service_worker_dispatcher_unittest.cc b/content/child/service_worker/service_worker_dispatcher_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..33b758f583c5ca90fa31bdc6e94d3ace4d3e4146
--- /dev/null
+++ b/content/child/service_worker/service_worker_dispatcher_unittest.cc
@@ -0,0 +1,217 @@
+// 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 "content/child/service_worker/service_worker_dispatcher.h"
+#include "content/child/service_worker/service_worker_message_sender.h"
+#include "content/child/service_worker/web_service_worker_impl.h"
+#include "content/child/service_worker/web_service_worker_registration_impl.h"
+#include "content/common/service_worker/service_worker_messages.h"
+#include "content/common/service_worker/service_worker_types.h"
+#include "ipc/ipc_test_sink.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+class ServiceWorkerTestSender : public ServiceWorkerMessageSender {
+ public:
+  explicit ServiceWorkerTestSender(IPC::TestSink* ipc_sink)
+      : ServiceWorkerMessageSender(nullptr), ipc_sink_(ipc_sink) {}
+
+  bool Send(IPC::Message* message) override {
+    return ipc_sink_->Send(message);
+  }
+
+ private:
+  ~ServiceWorkerTestSender() override {}
+
+  IPC::TestSink* ipc_sink_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerTestSender);
+};
+
+class ServiceWorkerDispatcherTest : public testing::Test {
+ public:
+  ServiceWorkerDispatcherTest() {}
+
+  void SetUp() override {
+    sender_ = new ServiceWorkerTestSender(&ipc_sink_);
+    dispatcher_.reset(new ServiceWorkerDispatcher(sender_.get()));
+  }
+
+  void CreateObjectInfoAndVersionAttributes(
+      ServiceWorkerRegistrationObjectInfo* info,
+      ServiceWorkerVersionAttributes* attrs) {
+    info->handle_id = 10;
+    info->registration_id = 20;
+
+    attrs->active.handle_id = 100;
+    attrs->active.version_id = 200;
+    attrs->waiting.handle_id = 101;
+    attrs->waiting.version_id = 201;
+    attrs->installing.handle_id = 102;
+    attrs->installing.version_id = 202;
+  }
+
+  WebServiceWorkerRegistrationImpl* FindOrCreateRegistration(
+      const ServiceWorkerRegistrationObjectInfo& info,
+      const ServiceWorkerVersionAttributes& attrs) {
+    return dispatcher_->FindOrCreateRegistration(info, attrs);
+  }
+
+  bool ContainsServiceWorker(int handle_id) {
+    return ContainsKey(dispatcher_->service_workers_, handle_id);
+  }
+
+  bool ContainsRegistration(int registration_handle_id) {
+    return ContainsKey(dispatcher_->registrations_, registration_handle_id);
+  }
+
+  ServiceWorkerDispatcher* dispatcher() { return dispatcher_.get(); }
+  IPC::TestSink* ipc_sink() { return &ipc_sink_; }
+
+ private:
+  IPC::TestSink ipc_sink_;
+  scoped_ptr<ServiceWorkerDispatcher> dispatcher_;
+  scoped_refptr<ServiceWorkerMessageSender> sender_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDispatcherTest);
+};
+
+// TODO(nhiroki): Add tests for message handlers especially to receive reference
+// counts like OnAssociateRegistration().
+
+TEST_F(ServiceWorkerDispatcherTest, GetServiceWorker) {
+  ServiceWorkerRegistrationObjectInfo info;
+  ServiceWorkerVersionAttributes attrs;
+  CreateObjectInfoAndVersionAttributes(&info, &attrs);
+
+  // Should return a worker object newly created with incrementing refcount.
+  bool adopt_handle = false;
+  scoped_ptr<WebServiceWorkerImpl> worker(
+      dispatcher()->GetServiceWorker(attrs.installing, adopt_handle));
+  EXPECT_TRUE(worker);
+  EXPECT_TRUE(ContainsServiceWorker(attrs.installing.handle_id));
+  EXPECT_EQ(1UL, ipc_sink()->message_count());
+  EXPECT_EQ(ServiceWorkerHostMsg_IncrementServiceWorkerRefCount::ID,
+            ipc_sink()->GetMessageAt(0)->type());
+
+  ipc_sink()->ClearMessages();
+
+  // Should return the existing worker object.
+  adopt_handle = false;
+  WebServiceWorkerImpl* existing_worker =
+      dispatcher()->GetServiceWorker(attrs.installing, adopt_handle);
+  EXPECT_EQ(worker, existing_worker);
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+
+  // Should return the existing worker object with adopting refcount.
+  adopt_handle = true;
+  existing_worker =
+      dispatcher()->GetServiceWorker(attrs.installing, adopt_handle);
+  EXPECT_EQ(worker, existing_worker);
+  ASSERT_EQ(1UL, ipc_sink()->message_count());
+  EXPECT_EQ(ServiceWorkerHostMsg_DecrementServiceWorkerRefCount::ID,
+            ipc_sink()->GetMessageAt(0)->type());
+
+  ipc_sink()->ClearMessages();
+
+  // Should return another worker object newly created with adopting refcount.
+  adopt_handle = true;
+  scoped_ptr<WebServiceWorkerImpl> another_worker(
+      dispatcher()->GetServiceWorker(attrs.waiting, adopt_handle));
+  EXPECT_NE(worker.get(), another_worker.get());
+  EXPECT_TRUE(ContainsServiceWorker(attrs.waiting.handle_id));
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+
+  // Should return nullptr when a given object info is invalid.
+  adopt_handle = false;
+  WebServiceWorkerImpl* invalid_worker =
+      dispatcher()->GetServiceWorker(ServiceWorkerObjectInfo(), adopt_handle);
+  EXPECT_FALSE(invalid_worker);
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+
+  adopt_handle = true;
+  invalid_worker =
+      dispatcher()->GetServiceWorker(ServiceWorkerObjectInfo(), adopt_handle);
+  EXPECT_FALSE(invalid_worker);
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+}
+
+TEST_F(ServiceWorkerDispatcherTest, CreateServiceWorkerRegistration) {
+  ServiceWorkerRegistrationObjectInfo info;
+  ServiceWorkerVersionAttributes attrs;
+  CreateObjectInfoAndVersionAttributes(&info, &attrs);
+
+  // Should return a registration object newly created with incrementing
+  // refcount.
+  bool adopt_handle = false;
+  scoped_ptr<WebServiceWorkerRegistrationImpl> registration(
+      dispatcher()->CreateServiceWorkerRegistration(info, adopt_handle));
+  EXPECT_TRUE(registration);
+  EXPECT_TRUE(ContainsRegistration(info.handle_id));
+  ASSERT_EQ(1UL, ipc_sink()->message_count());
+  EXPECT_EQ(ServiceWorkerHostMsg_IncrementRegistrationRefCount::ID,
+            ipc_sink()->GetMessageAt(0)->type());
+
+  registration.reset();
+  EXPECT_FALSE(ContainsRegistration(info.handle_id));
+  ipc_sink()->ClearMessages();
+
+  // Should return another registration object newly created with adopting
+  // refcount.
+  adopt_handle = true;
+  scoped_ptr<WebServiceWorkerRegistrationImpl> another_registration(
+      dispatcher()->CreateServiceWorkerRegistration(info, adopt_handle));
+  EXPECT_TRUE(another_registration);
+  EXPECT_TRUE(ContainsRegistration(info.handle_id));
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+
+  another_registration.reset();
+  ipc_sink()->ClearMessages();
+
+  // should return nullptr when a given object info is invalid.
+  adopt_handle = false;
+  scoped_ptr<WebServiceWorkerRegistrationImpl> invalid_registration(
+      dispatcher()->CreateServiceWorkerRegistration(
+          ServiceWorkerRegistrationObjectInfo(), adopt_handle));
+  EXPECT_FALSE(invalid_registration);
+  EXPECT_FALSE(ContainsRegistration(info.handle_id));
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+
+  adopt_handle = true;
+  invalid_registration.reset(dispatcher()->CreateServiceWorkerRegistration(
+      ServiceWorkerRegistrationObjectInfo(), adopt_handle));
+  EXPECT_FALSE(invalid_registration);
+  EXPECT_FALSE(ContainsRegistration(info.handle_id));
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+}
+
+TEST_F(ServiceWorkerDispatcherTest, FindOrCreateRegistration) {
+  ServiceWorkerRegistrationObjectInfo info;
+  ServiceWorkerVersionAttributes attrs;
+  CreateObjectInfoAndVersionAttributes(&info, &attrs);
+
+  // Should return a registration object newly created with adopting refcounts.
+  scoped_ptr<WebServiceWorkerRegistrationImpl> registration(
+      FindOrCreateRegistration(info, attrs));
+  EXPECT_TRUE(registration);
+  EXPECT_EQ(info.registration_id, registration->registration_id());
+  EXPECT_EQ(0UL, ipc_sink()->message_count());
+
+  // Should return the existing registration object with adopting refcounts.
+  WebServiceWorkerRegistrationImpl* existing_registration =
+      FindOrCreateRegistration(info, attrs);
+  EXPECT_EQ(registration, existing_registration);
+  ASSERT_EQ(4UL, ipc_sink()->message_count());
+  EXPECT_EQ(ServiceWorkerHostMsg_DecrementRegistrationRefCount::ID,
+            ipc_sink()->GetMessageAt(0)->type());
+  EXPECT_EQ(ServiceWorkerHostMsg_DecrementServiceWorkerRefCount::ID,
+            ipc_sink()->GetMessageAt(1)->type());
+  EXPECT_EQ(ServiceWorkerHostMsg_DecrementServiceWorkerRefCount::ID,
+            ipc_sink()->GetMessageAt(2)->type());
+  EXPECT_EQ(ServiceWorkerHostMsg_DecrementServiceWorkerRefCount::ID,
+            ipc_sink()->GetMessageAt(3)->type());
+}
+
+}  // namespace content