[Net] Propagate priority changes from URLRequest to HttpTransaction

net/url_request/url_request_http_job_unittest.cc

+// Copyright (c) 2013 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 "net/url_request/url_request_http_job.h"
+
+#include <cstddef>
+
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/auth.h"
+#include "net/http/http_transaction_factory.h"
+#include "net/http/http_transaction_unittest.h"
+#include "net/url_request/url_request_status.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+namespace {
+
+// Inherit from URLRequestHttpJob to expose the priority and some
+// other hidden functions.
+class TestURLRequestHttpJob : public URLRequestHttpJob {
+ public:
+  explicit TestURLRequestHttpJob(URLRequest* request)
+      : URLRequestHttpJob(request, NULL,
+                          request->context()->http_user_agent_settings()) {}
+
+  using URLRequestHttpJob::SetPriority;
+  using URLRequestHttpJob::Start;
+  using URLRequestHttpJob::Kill;
+  using URLRequestHttpJob::priority;
+
+ protected:
+  virtual ~TestURLRequestHttpJob() {}
+};
+
+class URLRequestHttpJobTest : public ::testing::Test {
+ protected:
+  URLRequestHttpJobTest()
+      : req_(GURL("http://www.example.com"), &delegate_, &context_, NULL) {
+    context_.set_http_transaction_factory(&network_layer_);
+  }
+
+  MockNetworkLayer network_layer_;
+  TestURLRequestContext context_;
+  TestDelegate delegate_;
+  TestURLRequest req_;
+};
+
+// Make sure that SetPriority actually sets the URLRequestHttpJob's
+// priority, both before and after start.
+TEST_F(URLRequestHttpJobTest, SetPriorityBasic) {
+  scoped_refptr<TestURLRequestHttpJob> job(new TestURLRequestHttpJob(&req_));
+  EXPECT_EQ(DEFAULT_PRIORITY, job->priority());
+
+  job->SetPriority(LOWEST);
+  EXPECT_EQ(LOWEST, job->priority());
+
+  job->SetPriority(LOW);
+  EXPECT_EQ(LOW, job->priority());
+
+  job->Start();
+  EXPECT_EQ(LOW, job->priority());
+
+  job->SetPriority(MEDIUM);
+  EXPECT_EQ(MEDIUM, job->priority());
+}
+
+// Make sure that URLRequestHttpJob passes on its priority to its
+// transaction on start.
+TEST_F(URLRequestHttpJobTest, SetTransactionPriorityOnStart) {
+  scoped_refptr<TestURLRequestHttpJob> job(new TestURLRequestHttpJob(&req_));
+  job->SetPriority(LOW);
+
+  EXPECT_FALSE(network_layer_.last_transaction());
+
+  job->Start();
+
+  ASSERT_TRUE(network_layer_.last_transaction());
+  EXPECT_EQ(LOW, network_layer_.last_transaction()->priority());
+}
+
+// Make sure that URLRequestHttpJob passes on its priority updates to
+// its transaction.
+TEST_F(URLRequestHttpJobTest, SetTransactionPriority) {
+  scoped_refptr<TestURLRequestHttpJob> job(new TestURLRequestHttpJob(&req_));
+  job->SetPriority(LOW);
+  job->Start();
+  ASSERT_TRUE(network_layer_.last_transaction());
+  EXPECT_EQ(LOW, network_layer_.last_transaction()->priority());
+
+  job->SetPriority(HIGHEST);
+  EXPECT_EQ(HIGHEST, network_layer_.last_transaction()->priority());
+}
+
+// Make sure that URLRequestHttpJob passes on its priority updates to
+// newly-created transactions after the first one.
+TEST_F(URLRequestHttpJobTest, SetSubsequentTransactionPriority) {
+  scoped_refptr<TestURLRequestHttpJob> job(new TestURLRequestHttpJob(&req_));
+  job->Start();
+
+  job->SetPriority(LOW);
+  ASSERT_TRUE(network_layer_.last_transaction());
+  EXPECT_EQ(LOW, network_layer_.last_transaction()->priority());
+
+  job->Kill();
+  network_layer_.ClearLastTransaction();
+
+  // Creates a second transaction.
+  job->Start();
+  ASSERT_TRUE(network_layer_.last_transaction());
+  EXPECT_EQ(LOW, network_layer_.last_transaction()->priority());
+}
+
+}  // namespace
+
+}  // namespace net