content::ResourceDispatcherHostImpl changes for stale-while-revalidate

content/browser/loader/async_revalidation_driver_unittest.cc

Index: content/browser/loader/async_revalidation_driver_unittest.cc
diff --git a/content/browser/loader/async_revalidation_driver_unittest.cc b/content/browser/loader/async_revalidation_driver_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0e858e07eed8caf77fd33371e81fc790d3869584
--- /dev/null
+++ b/content/browser/loader/async_revalidation_driver_unittest.cc
@@ -0,0 +1,402 @@
+// 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/browser/loader/async_revalidation_driver.h"
+
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/location.h"
+#include "base/macros.h"
+#include "base/run_loop.h"
+#include "content/public/browser/client_certificate_delegate.h"
+#include "content/public/common/content_client.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "content/test/test_content_browser_client.h"
+#include "ipc/ipc_message.h"
+#include "net/base/net_errors.h"
+#include "net/base/network_delegate_impl.h"
+#include "net/base/request_priority.h"
+#include "net/ssl/ssl_cert_request_info.h"
+#include "net/url_request/url_request_job_factory.h"
+#include "net/url_request/url_request_job_factory_impl.h"
+#include "net/url_request/url_request_status.h"
+#include "net/url_request/url_request_test_job.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+// Dummy implementation of ResourceThrottle, an instance of which is needed to
+// initialize AsyncRevalidationDriver.
+class ResourceThrottleStub : public ResourceThrottle {
+ public:
+  ResourceThrottleStub() {}
+
+  // If true, defers the request in WillStartRequest.
+  void set_defer_request_on_will_start_request(
+      bool defer_request_on_will_start_request) {
+    defer_request_on_will_start_request_ = defer_request_on_will_start_request;
+  }
+
+  // ResourceThrottler implementation:
+  void WillStartRequest(bool* defer) override {
+    *defer = defer_request_on_will_start_request_;
+  }
+
+  const char* GetNameForLogging() const override {
+    return "ResourceThrottleStub";
+  }
+
+ private:
+  bool defer_request_on_will_start_request_ = false;
+
+  DISALLOW_COPY_AND_ASSIGN(ResourceThrottleStub);
+};
+
+// There are multiple layers of boilerplate needed to use a URLRequestTestJob
+// subclass.  Subclasses of AsyncRevalidationDriverTest can use
+// BindCreateProtocolHandlerCallback() to bypass most of that boilerplate.
+using CreateProtocolHandlerCallback =
+    base::Callback<scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>()>;
+
+template <typename T>
+CreateProtocolHandlerCallback BindCreateProtocolHandlerCallback() {
+  static_assert(std::is_base_of<net::URLRequestJob, T>::value,
+                "Template argument to BindCreateProtocolHandlerCallback() must "
+                "be a subclass of URLRequestJob.");
+
+  class TemplatedProtocolHandler
+      : public net::URLRequestJobFactory::ProtocolHandler {
+   public:
+    static scoped_ptr<net::URLRequestJobFactory::ProtocolHandler> Create() {
+      return make_scoped_ptr(new TemplatedProtocolHandler());
+    }
+
+    // URLRequestJobFactory::ProtocolHandler implementation:
+    net::URLRequestJob* MaybeCreateJob(
+        net::URLRequest* request,
+        net::NetworkDelegate* network_delegate) const override {
+      return new T(request, network_delegate);
+    }
+  };
+
+  return base::Bind(&TemplatedProtocolHandler::Create);
+}
+
+// An implementation of NetworkDelegate that captures the status of the last
+// URLRequest to be destroyed.
+class StatusCapturingNetworkDelegate : public net::NetworkDelegateImpl {
+ public:
+  const net::URLRequestStatus& last_status() { return last_status_; }
+
+ private:
+  // net::NetworkDelegate implementation.
+  void OnURLRequestDestroyed(net::URLRequest* request) override {
+    last_status_ = request->status();
+  }
+
+  net::URLRequestStatus last_status_;
+};
+
+class AsyncRevalidationDriverTest : public testing::Test {
+ protected:
+  // Constructor for test fixtures that subclass this one.
+  AsyncRevalidationDriverTest(
+      const CreateProtocolHandlerCallback& create_protocol_handler_callback)
+      : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
+        create_protocol_handler_callback_(create_protocol_handler_callback),
+        raw_ptr_resource_throttle_(nullptr),
+        raw_ptr_request_(nullptr) {
+    test_url_request_context_.set_job_factory(&job_factory_);
+    test_url_request_context_.set_network_delegate(&network_delegate_);
+  }
+
+  // Constructor for tests that use this fixture directly.
+  AsyncRevalidationDriverTest()
+      : AsyncRevalidationDriverTest(
+            base::Bind(net::URLRequestTestJob::CreateProtocolHandler)) {}
+
+  bool async_revalidation_complete_called() const {
+    return async_revalidation_complete_called_;
+  }
+
+  const net::URLRequestStatus& last_status() {
+    return network_delegate_.last_status();
+  }
+
+  void SetUpAsyncRevalidationDriverWithRequestToUrl(const GURL& url) {
+    scoped_ptr<net::URLRequest> request(test_url_request_context_.CreateRequest(
+        url, net::DEFAULT_PRIORITY, nullptr /* delegate */));
+    raw_ptr_request_ = request.get();
+    raw_ptr_resource_throttle_ = new ResourceThrottleStub();
+    // This use of base::Unretained() is safe because |driver_|, and the closure
+    // passed to it, will be destroyed before this object is.
+    driver_.reset(new AsyncRevalidationDriver(
+        std::move(request), make_scoped_ptr(raw_ptr_resource_throttle_),
+        base::Bind(&AsyncRevalidationDriverTest::OnAsyncRevalidationComplete,
+                   base::Unretained(this))));
+  }
+
+  void SetUpAsyncRevalidationDriverWithDefaultRequest() {
+    SetUpAsyncRevalidationDriverWithRequestToUrl(
+        net::URLRequestTestJob::test_url_1());
+  }
+
+  void SetUp() override {
+    job_factory_.SetProtocolHandler("test",
+                                    create_protocol_handler_callback_.Run());
+    SetUpAsyncRevalidationDriverWithDefaultRequest();
+  }
+
+  void OnAsyncRevalidationComplete() {
+    EXPECT_FALSE(async_revalidation_complete_called_);
+    async_revalidation_complete_called_ = true;
+    driver_.reset();
+  }
+
+  TestBrowserThreadBundle thread_bundle_;
+  net::URLRequestJobFactoryImpl job_factory_;
+  net::TestURLRequestContext test_url_request_context_;
+  StatusCapturingNetworkDelegate network_delegate_;
+  CreateProtocolHandlerCallback create_protocol_handler_callback_;
+
+  // The AsyncRevalidationDriver owns the URLRequest and the ResourceThrottle.
+  ResourceThrottleStub* raw_ptr_resource_throttle_;
+  net::URLRequest* raw_ptr_request_;
+  scoped_ptr<AsyncRevalidationDriver> driver_;
+  bool async_revalidation_complete_called_ = false;
+};
+
+TEST_F(AsyncRevalidationDriverTest, NormalRequestCompletes) {
+  driver_->StartRequest();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_TRUE(async_revalidation_complete_called());
+}
+
+// Verifies that request that should be deferred at start is deferred.
+TEST_F(AsyncRevalidationDriverTest, DeferOnStart) {
+  raw_ptr_resource_throttle_->set_defer_request_on_will_start_request(true);
+
+  driver_->StartRequest();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_FALSE(raw_ptr_request_->is_pending());
+  EXPECT_FALSE(async_revalidation_complete_called());
+}
+
+// Verifies that resuming a deferred request works. Assumes that DeferOnStart
+// passes.
+TEST_F(AsyncRevalidationDriverTest, ResumeDeferredRequestWorks) {
+  raw_ptr_resource_throttle_->set_defer_request_on_will_start_request(true);
+
+  driver_->StartRequest();
+  base::RunLoop().RunUntilIdle();
+
+  ResourceController* driver_as_resource_controller = driver_.get();
+  driver_as_resource_controller->Resume();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_TRUE(async_revalidation_complete_called());
+}
+
+// Verifies that redirects are not followed.
+TEST_F(AsyncRevalidationDriverTest, RedirectsAreNotFollowed) {
+  SetUpAsyncRevalidationDriverWithRequestToUrl(
+      net::URLRequestTestJob::test_url_redirect_to_url_2());
+
+  driver_->StartRequest();
+  while (net::URLRequestTestJob::ProcessOnePendingMessage())
+    base::RunLoop().RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
+  EXPECT_FALSE(last_status().is_success());
+  EXPECT_EQ(net::ERR_ABORTED, last_status().error());
+  EXPECT_TRUE(async_revalidation_complete_called());
+}
+
+// A mock URLRequestJob which simulates an SSL client auth request.
+class MockClientCertURLRequestJob : public net::URLRequestTestJob {
+ public:
+  MockClientCertURLRequestJob(net::URLRequest* request,
+                              net::NetworkDelegate* network_delegate)
+      : net::URLRequestTestJob(request, network_delegate, true),
+        weak_factory_(this) {}
+
+  // net::URLRequestTestJob implementation:
+  void Start() override {
+    scoped_refptr<net::SSLCertRequestInfo> cert_request_info(
+        new net::SSLCertRequestInfo);
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE,
+        base::Bind(&MockClientCertURLRequestJob::NotifyCertificateRequested,
+                   weak_factory_.GetWeakPtr(), cert_request_info));
+  }
+
+  void ContinueWithCertificate(
+      net::X509Certificate* cert,
+      net::SSLPrivateKey* client_private_key) override {
+    ADD_FAILURE() << "Certificate supplied.";
+  }
+
+  void Kill() override {
+    weak_factory_.InvalidateWeakPtrs();
+    URLRequestJob::Kill();
+  }
+
+ private:
+  ~MockClientCertURLRequestJob() override {}
+
+  base::WeakPtrFactory<MockClientCertURLRequestJob> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockClientCertURLRequestJob);
+};
+
+class AsyncRevalidationDriverClientCertTest
+    : public AsyncRevalidationDriverTest {
+ protected:
+  AsyncRevalidationDriverClientCertTest()
+      : AsyncRevalidationDriverTest(
+            BindCreateProtocolHandlerCallback<MockClientCertURLRequestJob>()) {}
+};
+
+// Test browser client that causes the test to fail if SelectClientCertificate()
+// is called. Automatically sets itself as the browser client when constructed
+// and restores the old browser client in the destructor.
+class ScopedDontSelectCertificateBrowserClient
+    : public TestContentBrowserClient {
+ public:
+  ScopedDontSelectCertificateBrowserClient() {
+    old_client_ = SetBrowserClientForTesting(this);
+  }
+
+  ~ScopedDontSelectCertificateBrowserClient() override {
+    SetBrowserClientForTesting(old_client_);
+  }
+
+  void SelectClientCertificate(
+      WebContents* web_contents,
+      net::SSLCertRequestInfo* cert_request_info,
+      scoped_ptr<ClientCertificateDelegate> delegate) override {
+    ADD_FAILURE() << "SelectClientCertificate was called.";
+  }
+
+ private:
+  ContentBrowserClient* old_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedDontSelectCertificateBrowserClient);
+};
+
+// Verifies that async revalidation requests do not attempt to provide client
+// certificates.
+TEST_F(AsyncRevalidationDriverClientCertTest, RequestRejected) {
+  // Ensure that SelectClientCertificate is not called during this test.
+  ScopedDontSelectCertificateBrowserClient test_client;
+
+  // Start the request and wait for it to pause.
+  driver_->StartRequest();
+
+  // Because TestBrowserThreadBundle only uses one real thread, this is
+  // sufficient to ensure that tasks posted to the "UI thread" have run.
+  base::RunLoop().RunUntilIdle();
+
+  // Check that the request aborted.
+  EXPECT_FALSE(last_status().is_success());
+  EXPECT_EQ(net::ERR_SSL_CLIENT_AUTH_CERT_NEEDED, last_status().error());
+  EXPECT_TRUE(async_revalidation_complete_called());
+}
+
+// A mock URLRequestJob which simulates an SSL certificate error.
+class MockSSLErrorURLRequestJob : public net::URLRequestTestJob {
+ public:
+  MockSSLErrorURLRequestJob(net::URLRequest* request,
+                            net::NetworkDelegate* network_delegate)
+      : net::URLRequestTestJob(request, network_delegate, true) {}
+
+  // net::URLRequestTestJob implementation:
+  void Start() override {
+    // This SSLInfo isn't really valid, but it is good enough for testing.
+    net::SSLInfo ssl_info;
+    ssl_info.SetCertError(net::ERR_CERT_DATE_INVALID);
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE,
+        base::Bind(&MockSSLErrorURLRequestJob::NotifySSLCertificateError, this,
+                   ssl_info, false));
+  }
+
+  void ContinueDespiteLastError() override {
+    ADD_FAILURE() << "ContinueDespiteLastError called.";
+  }
+
+ private:
+  ~MockSSLErrorURLRequestJob() override {}
+
+  DISALLOW_COPY_AND_ASSIGN(MockSSLErrorURLRequestJob);
+};
+
+class AsyncRevalidationDriverSSLErrorTest : public AsyncRevalidationDriverTest {
+ protected:
+  AsyncRevalidationDriverSSLErrorTest()
+      : AsyncRevalidationDriverTest(
+            BindCreateProtocolHandlerCallback<MockSSLErrorURLRequestJob>()) {}
+};
+
+// Verifies that async revalidation requests do not attempt to recover from SSL
+// certificate errors.
+TEST_F(AsyncRevalidationDriverSSLErrorTest, RequestWithSSLErrorRejected) {
+  // Start the request and wait for it to pause.
+  driver_->StartRequest();
+  base::RunLoop().RunUntilIdle();
+
+  // Check that the request has been aborted.
+  EXPECT_FALSE(last_status().is_success());
+  EXPECT_EQ(net::ERR_ABORTED, last_status().error());
+  EXPECT_TRUE(async_revalidation_complete_called());
+}
+
+// A URLRequestTestJob that sets |request_time| and |was_cached| on their
+// response_info, and causes the test to fail if Read() is called.
+class FromCacheURLRequestJob : public net::URLRequestTestJob {
+ public:
+  FromCacheURLRequestJob(net::URLRequest* request,
+                         net::NetworkDelegate* network_delegate)
+      : net::URLRequestTestJob(request, network_delegate, true) {}
+
+  void GetResponseInfo(net::HttpResponseInfo* info) override {
+    URLRequestTestJob::GetResponseInfo(info);
+    info->request_time = base::Time::Now();
+    info->was_cached = true;
+  }
+
+  int ReadRawData(net::IOBuffer* buf, int buf_size) override {
+    ADD_FAILURE() << "ReadRawData() was called.";
+    return URLRequestTestJob::ReadRawData(buf, buf_size);
+  }
+
+ private:
+  ~FromCacheURLRequestJob() override {}
+
+  DISALLOW_COPY_AND_ASSIGN(FromCacheURLRequestJob);
+};
+
+class AsyncRevalidationDriverFromCacheTest
+    : public AsyncRevalidationDriverTest {
+ protected:
+  AsyncRevalidationDriverFromCacheTest()
+      : AsyncRevalidationDriverTest(
+            BindCreateProtocolHandlerCallback<FromCacheURLRequestJob>()) {}
+};
+
+TEST_F(AsyncRevalidationDriverFromCacheTest,
+       CacheNotReadOnSuccessfulRevalidation) {
+  driver_->StartRequest();
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_TRUE(async_revalidation_complete_called());
+}
+
+}  // namespace
+}  // namespace content