Generates the DTLS identity in browser process and returns it to render process.

content/browser/media/webrtc_identity_store_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 "base/bind.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "base/run_loop.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "content/browser/media/webrtc_identity_store.h"
+#include "content/browser/renderer_host/media/webrtc_identity_service_host.h"
+#include "content/common/media/webrtc_identity_messages.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "content/public/test/test_utils.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/net_errors.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+class WebRTCIdentityServiceHostForTest : public WebRTCIdentityServiceHost {
+ public:
+  explicit WebRTCIdentityServiceHostForTest(
+      WebRTCIdentityStore* identity_store)
+      : WebRTCIdentityServiceHost(identity_store) {}
+
+  // content::BrowserMessageFilter override.
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok) OVERRIDE {
+    return WebRTCIdentityServiceHost::OnMessageReceived(message,
+                                                        message_was_ok);

[Ryan Sleevi, 2013/06/27 00:14:55]

Why OVERRIDE this, when you're just forwarding to the parent implementation?

+  }
+
+  virtual void OnComplete(int request_id,
+                          int error,
+                          const std::string& certificate,
+                          const std::string& private_key) OVERRIDE {
+    request_result_map_[request_id] = error;
+    WebRTCIdentityServiceHost::OnComplete(
+        request_id, error, certificate, private_key);
+  }
+
+  int GetRequestResultError(int request_id) {
+    DCHECK(request_result_map_.find(request_id) != request_result_map_.end());

[Ryan Sleevi, 2013/06/27 00:14:55]

Don't use DCHECK in tests - it will crash the harness.

+    return request_result_map_[request_id];
+  }
+
+ private:
+  virtual ~WebRTCIdentityServiceHostForTest() {}
+
+  std::map<int, int> request_result_map_;
+};
+
+class WebRTCIdentityStoreTest : public testing::Test {
+ public:
+  WebRTCIdentityStoreTest()
+      : browser_thread_bundle_(TestBrowserThreadBundle::IO_MAINLOOP),
+        sequenced_worker_pool_(
+            new base::SequencedWorkerPool(3, "ServerBoundCertServiceTest")) {
+    webrtc_identity_store_.reset(
+        new WebRTCIdentityStore(sequenced_worker_pool_));
+  }
+
+  virtual ~WebRTCIdentityStoreTest() { sequenced_worker_pool_->Shutdown(); }
+
+  virtual void SignalWaitableEvent(const base::Closure& quit_task) {
+    quit_task.Run();
+  }
+
+ protected:
+  TestBrowserThreadBundle browser_thread_bundle_;
+  scoped_refptr<base::SequencedWorkerPool> sequenced_worker_pool_;
+  scoped_ptr<WebRTCIdentityStore> webrtc_identity_store_;
+};
+
+void OnRequestCompleted(bool* completed,
+                        int error,
+                        const std::string& certificate,
+                        const std::string& private_key) {
+  ASSERT_EQ(net::OK, error);
+  ASSERT_NE("", certificate);
+  ASSERT_NE("", private_key);
+  *completed = true;
+}
+
+TEST_F(WebRTCIdentityStoreTest, RequestOverMaxWithinOneSecRejected) {
+  scoped_refptr<WebRTCIdentityServiceHostForTest> service_host(
+      new WebRTCIdentityServiceHostForTest(webrtc_identity_store_.get()));
+
+  int request_id = 0;
+  const GURL origin("http://google.com");
+  const std::string identity_name = "a";
+  const std::string common_name = "b";
+  bool message_was_ok = true;
+
+  while (request_id <= WebRTCIdentityServiceHost::MAX_REQUESTS_PER_SECOND) {
+    service_host->OnMessageReceived(WebRTCIdentityMsg_RequestIdentity(
+        request_id, origin, identity_name, common_name), &message_was_ok);

[Ryan Sleevi, 2013/06/27 00:14:55]

This seems like you're actually going to kick off multiple generation requests,
which will run quite slow under valgrind/asan/tsan.

You should also mock the store, to return dummy results, rather than actually
generating legitimate certificates.

This will also help you better ensure constant time execution (eg: within the 1
second)

+    request_id++;
+  }
+  sequenced_worker_pool_->FlushForTesting();
+  base::RunLoop().RunUntilIdle();
+  for (request_id = 0;
+       request_id <= WebRTCIdentityServiceHost::MAX_REQUESTS_PER_SECOND;
+       request_id ++) {

[Ryan Sleevi, 2013/06/27 00:14:55]

style: eliminate extra whitespace

+    if (request_id < WebRTCIdentityServiceHost::MAX_REQUESTS_PER_SECOND) {
+      EXPECT_EQ(net::OK, service_host->GetRequestResultError(request_id));
+    } else {
+      EXPECT_EQ(net::ERR_INSUFFICIENT_RESOURCES,
+                service_host->GetRequestResultError(request_id));
+    }
+  }
+}
+
+TEST_F(WebRTCIdentityStoreTest, RequestOverMaxAfterOneSecAccepted) {
+  scoped_refptr<WebRTCIdentityServiceHostForTest> service_host(
+      new WebRTCIdentityServiceHostForTest(webrtc_identity_store_.get()));
+
+  int request_id = 0;
+  const GURL origin("http://google.com");
+  const std::string identity_name = "a";
+  const std::string common_name = "b";
+  bool message_was_ok = true;
+
+  base::Time start = base::Time::NowFromSystemTime();
+  while (request_id < WebRTCIdentityServiceHost::MAX_REQUESTS_PER_SECOND) {
+    service_host->OnMessageReceived(WebRTCIdentityMsg_RequestIdentity(
+        request_id, origin, identity_name, common_name), &message_was_ok);
+    request_id++;
+  }
+  sequenced_worker_pool_->FlushForTesting();
+  base::RunLoop().RunUntilIdle();
+
+  // Wait until 1 second elapses after the first request.
+  base::TimeDelta delay = base::TimeDelta::FromSeconds(1) -
+      (base::Time::NowFromSystemTime() - start);
+  if (delay > base::TimeDelta()) {
+    scoped_refptr<content::MessageLoopRunner> runner =
+        new content::MessageLoopRunner;
+    base::Timer timer(false, false);
+    timer.Start(FROM_HERE, delay,
+                base::Bind(&WebRTCIdentityStoreTest::SignalWaitableEvent,
+                           base::Unretained(this), runner->QuitClosure()));
+    runner->Run();
+  }

[Ryan Sleevi, 2013/06/27 00:14:55]

This form of testing (effectively sleep(1)) is strongly discouraged.

Instead, using a time service you can mock/lie with is recommended.

+  // This request should be accepted.
+  service_host->OnMessageReceived(WebRTCIdentityMsg_RequestIdentity(
+        request_id, origin, identity_name, common_name), &message_was_ok);
+
+  sequenced_worker_pool_->FlushForTesting();
+  base::RunLoop().RunUntilIdle();
+  for (request_id = 0;
+       request_id <= WebRTCIdentityServiceHost::MAX_REQUESTS_PER_SECOND;
+       request_id ++) {
+    EXPECT_EQ(net::OK, service_host->GetRequestResultError(request_id));
+  }
+}
+
+TEST_F(WebRTCIdentityStoreTest, RequestIdentity) {
+  scoped_ptr<bool> completed(new bool(false));
+  base::Closure cancel_callback;
+  webrtc_identity_store_->RequestIdentity(
+      GURL("http://google.com"),
+      "a",
+      "b",
+      base::Bind(&OnRequestCompleted, base::Unretained(completed.get())),
+      &cancel_callback);
+  sequenced_worker_pool_->FlushForTesting();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(true, *completed);
+}
+
+TEST_F(WebRTCIdentityStoreTest, CancelRequest) {
+  scoped_ptr<bool> completed(new bool(false));
+  base::Closure cancel_callback;
+  bool success = webrtc_identity_store_->RequestIdentity(
+      GURL("http://google.com"),
+      "a",
+      "b",
+      base::Bind(&OnRequestCompleted, base::Unretained(completed.get())),
+      &cancel_callback);
+  EXPECT_TRUE(success);
+  cancel_callback.Run();
+  sequenced_worker_pool_->FlushForTesting();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(false, *completed);
+}
+
+TEST_F(WebRTCIdentityStoreTest, MultipleRequests) {
+  scoped_ptr<bool> completed_1(new bool(false));
+  scoped_ptr<bool> completed_2(new bool(false));
+  base::Closure cancel_callback;
+  webrtc_identity_store_->RequestIdentity(
+      GURL("http://foo.com"),
+      "a",
+      "b",
+      base::Bind(&OnRequestCompleted, base::Unretained(completed_1.get())),
+      &cancel_callback);
+
+  webrtc_identity_store_->RequestIdentity(
+      GURL("http://bar.com"),
+      "a",
+      "b",
+      base::Bind(&OnRequestCompleted, base::Unretained(completed_2.get())),
+      &cancel_callback);
+
+  sequenced_worker_pool_->FlushForTesting();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(true, *completed_1);
+  EXPECT_EQ(true, *completed_2);
+}
+
+}  // namespace content