Use mojo for Chrome Loading, Part 1

content/child/url_response_body_consumer_unittest.cc

Index: content/child/url_response_body_consumer_unittest.cc
diff --git a/content/child/url_response_body_consumer_unittest.cc b/content/child/url_response_body_consumer_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c0a019bbdea9f1e90b36ed742d661824204bc31
--- /dev/null
+++ b/content/child/url_response_body_consumer_unittest.cc
@@ -0,0 +1,206 @@
+// 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 "content/child/url_response_body_consumer.h"
+
+#include "base/bind.h"
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "content/child/request_info.h"
+#include "content/child/resource_dispatcher.h"
+#include "content/common/resource_messages.h"
+#include "content/common/resource_request_completion_status.h"
+#include "content/public/child/request_peer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+namespace {
+
+class TestRequestPeer : public RequestPeer {
+ public:
+  struct Context;
+  explicit TestRequestPeer(Context* context) : context_(context) {}
+
+  void OnUploadProgress(uint64_t position, uint64_t size) override {
+    EXPECT_TRUE(false);

[kinuko, 2016/08/04 16:07:03]

nit: ADD_FAILURE ? (Here and below)

[yhirano, 2016/08/05 12:21:40]

Done.

+  }
+
+  bool OnReceivedRedirect(const net::RedirectInfo& redirect_info,
+                          const ResourceResponseInfo& info) override {
+    EXPECT_TRUE(false);
+    return false;
+  }
+
+  void OnReceivedResponse(const ResourceResponseInfo& info) override {
+    EXPECT_TRUE(false);
+  }
+
+  void OnDownloadedData(int len, int encoded_data_length) override {
+    EXPECT_TRUE(false);
+  }
+
+  void OnReceivedData(std::unique_ptr<ReceivedData> data) override {
+    EXPECT_FALSE(context_->complete);
+    context_->data.append(data->payload(), data->length());
+    context_->run_loop_quit_closure.Run();
+  }
+
+  void OnCompletedRequest(int error_code,
+                          bool was_ignored_by_handler,
+                          bool stale_copy_in_cache,
+                          const std::string& security_info,
+                          const base::TimeTicks& completion_time,
+                          int64_t total_transfer_size) override {
+    EXPECT_FALSE(context_->complete);
+    context_->complete = true;
+    context_->error_code = error_code;
+    context_->run_loop_quit_closure.Run();
+  }
+
+  struct Context {
+    // Data received. If downloading to file, remains empty.
+    std::string data;
+    bool complete = false;
+    base::Closure run_loop_quit_closure;
+    int error_code = net::OK;
+  };
+
+ private:
+  Context* context_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestRequestPeer);
+};
+
+class URLResponseBodyConsumerTest : public ::testing::Test,
+                                    public ::IPC::Sender {
+ protected:
+  URLResponseBodyConsumerTest()
+      : dispatcher_(new ResourceDispatcher(this, message_loop_.task_runner())) {
+  }
+
+  ~URLResponseBodyConsumerTest() override {
+    dispatcher_.reset();
+    base::RunLoop().RunUntilIdle();
+  }
+
+  bool Send(IPC::Message* message) override {
+    delete message;
+    return true;
+  }
+
+  std::unique_ptr<RequestInfo> CreateRequestInfo() {
+    std::unique_ptr<RequestInfo> request_info(new RequestInfo);
+    request_info->method = "GET";
+    request_info->url = GURL("http://www.example.com/");
+    return request_info;
+  }
+
+  MojoCreateDataPipeOptions CreateDataPipeOptions() {
+    MojoCreateDataPipeOptions options;
+    options.struct_size = sizeof(MojoCreateDataPipeOptions);
+    options.flags = MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE;
+    options.element_num_bytes = 1;
+    options.capacity_num_bytes = 1024;
+    return options;
+  }
+
+  void Run(TestRequestPeer::Context* context) {
+    base::RunLoop run_loop;
+    context->run_loop_quit_closure = run_loop.QuitClosure();
+    run_loop.Run();
+  }
+
+  base::MessageLoop message_loop_;
+  std::unique_ptr<ResourceDispatcher> dispatcher_;
+  static const MojoWriteDataFlags kNone = MOJO_WRITE_DATA_FLAG_NONE;
+};
+
+TEST_F(URLResponseBodyConsumerTest, ReceiveData) {
+  TestRequestPeer::Context context;
+  std::unique_ptr<RequestInfo> request_info(CreateRequestInfo());
+  int request_id = dispatcher_->StartAsync(
+      *request_info, nullptr, base::WrapUnique(new TestRequestPeer(&context)),
+      blink::WebURLRequest::LoadingIPCType::ChromeIPC, nullptr);

[kinuko, 2016/08/04 16:07:03]

This StartAsync() might feel a bit counter-intuitive as we call this with
ChromeIPC setting.  Having a helper method like SetUpRequestPeer(*request_info,
&context) and hide unnecessary StartAsync details inside it might help
readability?  (Here and below)

[yhirano, 2016/08/05 12:21:40]

Done.

+  mojo::DataPipe data_pipe(CreateDataPipeOptions());
+
+  scoped_refptr<URLResponseBodyConsumer> consumer(new URLResponseBodyConsumer(
+      request_id, dispatcher_.get(), std::move(data_pipe.consumer_handle)));
+
+  mojo::ScopedDataPipeProducerHandle writer =
+      std::move(data_pipe.producer_handle);
+  std::string buffer = "hello";
+  uint32_t size = buffer.size();
+  MojoResult result =
+      mojo::WriteDataRaw(writer.get(), buffer.c_str(), &size, kNone);
+  ASSERT_EQ(MOJO_RESULT_OK, result);
+  ASSERT_EQ(buffer.size(), size);
+
+  Run(&context);
+
+  EXPECT_FALSE(context.complete);
+  EXPECT_EQ("hello", context.data);
+}
+
+TEST_F(URLResponseBodyConsumerTest, OnCompleteThenClose) {
+  TestRequestPeer::Context context;
+  std::unique_ptr<RequestInfo> request_info(CreateRequestInfo());
+  int request_id = dispatcher_->StartAsync(
+      *request_info, nullptr, base::WrapUnique(new TestRequestPeer(&context)),
+      blink::WebURLRequest::LoadingIPCType::ChromeIPC, nullptr);
+  mojo::DataPipe data_pipe(CreateDataPipeOptions());
+
+  scoped_refptr<URLResponseBodyConsumer> consumer(new URLResponseBodyConsumer(
+      request_id, dispatcher_.get(), std::move(data_pipe.consumer_handle)));
+
+  consumer->OnComplete(ResourceRequestCompletionStatus());
+  mojo::ScopedDataPipeProducerHandle writer =
+      std::move(data_pipe.producer_handle);
+  std::string buffer = "hello";
+  uint32_t size = buffer.size();
+  MojoResult result =
+      mojo::WriteDataRaw(writer.get(), buffer.c_str(), &size, kNone);
+  ASSERT_EQ(MOJO_RESULT_OK, result);
+  ASSERT_EQ(buffer.size(), size);
+  writer.reset();
+
+  Run(&context);
+
+  EXPECT_FALSE(context.complete);
+  EXPECT_EQ("hello", context.data);
+
+  Run(&context);
+
+  EXPECT_TRUE(context.complete);
+  EXPECT_EQ("hello", context.data);
+}
+
+TEST_F(URLResponseBodyConsumerTest, CloseThenOnComplete) {
+  TestRequestPeer::Context context;
+  std::unique_ptr<RequestInfo> request_info(CreateRequestInfo());
+  int request_id = dispatcher_->StartAsync(
+      *request_info, nullptr, base::WrapUnique(new TestRequestPeer(&context)),
+      blink::WebURLRequest::LoadingIPCType::ChromeIPC, nullptr);
+  mojo::DataPipe data_pipe(CreateDataPipeOptions());
+
+  scoped_refptr<URLResponseBodyConsumer> consumer(new URLResponseBodyConsumer(
+      request_id, dispatcher_.get(), std::move(data_pipe.consumer_handle)));
+
+  ResourceRequestCompletionStatus status;
+  status.error_code = net::ERR_FAILED;
+  data_pipe.producer_handle.reset();
+  consumer->OnComplete(status);
+
+  Run(&context);
+
+  EXPECT_TRUE(context.complete);
+  EXPECT_EQ(net::ERR_FAILED, context.error_code);
+  EXPECT_EQ("", context.data);
+}
+
+}  // namespace
+
+}  // namespace content