[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 "base/memory/ref_counted.h"
+#include "net/http/http_transaction_unittest.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+class URLRequestHttpJobTest : public ::testing::Test {
+ protected:
+  URLRequestHttpJob* MakeHttpJob(
+      URLRequest* request,
+      NetworkDelegate* network_delegate,
+      const std::string& scheme) const {
+    return static_cast<URLRequestHttpJob*>(
+        URLRequestHttpJob::Factory(request, network_delegate, scheme));
+  }
+
+  bool HttpJobHasTransaction(const URLRequestHttpJob& job) const {
+    return job.transaction_ != NULL;
+  }
+
+  RequestPriority GetJobPriority(const URLRequestHttpJob& job) const {
+    return job.request_info_.priority;
+  }
+
+  RequestPriority GetJobTransactionPriority(
+      const URLRequestHttpJob& job) const {
+    const MockNetworkTransaction* transaction =
+        static_cast<MockNetworkTransaction*>(job.transaction_.get());

[mmenke, 2013/03/13 15:24:38]

I'd still really like to get rid of this friend requirement, net tests generally
avoid doing this.

Could create our own version MockNetworkLayer, and just have it make its single
network transaction accessible.  Doesn't use a whole lot of code.

[akalin, 2013/03/13 16:57:14]

Done. Ended up inheriting from URLRequestHttpJob and adding
last_network_transaction() to MockNetworkLayer.

+    return transaction->priority();
+  }
+
+  void StartJob(const scoped_refptr<URLRequestHttpJob>& job) const {
+    job->Start();
+  }
+
+  void SetJobPriority(const scoped_refptr<URLRequestHttpJob>& job,
+                      RequestPriority priority) const {
+    job->SetPriority(priority);
+  }
+};
+
+// Make sure that URLRequestHttpJob passes on its priority updates to
+// its transaction.
+TEST_F(URLRequestHttpJobTest, Priority) {
+  MockNetworkLayer network_layer;
+  net::TestURLRequestContext context;
+  context.set_http_transaction_factory(&network_layer);
+
+  net::TestDelegate d;
+  net::TestURLRequest req(GURL("http://www.example.com"), &d, &context, NULL);
+
+  scoped_refptr<URLRequestHttpJob> job = MakeHttpJob(&req, NULL, "http");
+  EXPECT_FALSE(HttpJobHasTransaction(*job));
+  EXPECT_EQ(LOWEST, GetJobPriority(*job));
+
+  req.SetPriority(MEDIUM);
+  // The priority doesn't propagate to the job until Start() is
+  // called.

[mmenke, 2013/03/13 15:24:38]

nit:  Think this fits on one line.

[akalin, 2013/03/13 16:57:14]

Done.

+  EXPECT_EQ(LOWEST, GetJobPriority(*job));
+
+  StartJob(job);
+  EXPECT_TRUE(HttpJobHasTransaction(*job));
+  EXPECT_EQ(MEDIUM, GetJobPriority(*job));
+  EXPECT_EQ(MEDIUM, GetJobTransactionPriority(*job));
+
+  SetJobPriority(job, HIGHEST);
+  EXPECT_EQ(HIGHEST, GetJobPriority(*job));
+  EXPECT_EQ(HIGHEST, GetJobTransactionPriority(*job));
+}
+
+}  // namespace net