Reporting: Implement delivery agent.

net/reporting/reporting_delivery_agent_unittest.cc

Index: net/reporting/reporting_delivery_agent_unittest.cc
diff --git a/net/reporting/reporting_delivery_agent_unittest.cc b/net/reporting/reporting_delivery_agent_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b2d8fbfd3e4c561639e631ba77093d8e77448020
--- /dev/null
+++ b/net/reporting/reporting_delivery_agent_unittest.cc
@@ -0,0 +1,382 @@
+// Copyright 2017 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/reporting/reporting_delivery_agent.h"
+
+#include <vector>
+
+#include "base/json/json_reader.h"
+#include "base/memory/ptr_util.h"
+#include "base/test/simple_test_tick_clock.h"
+#include "base/test/values_test_util.h"
+#include "base/time/time.h"
+#include "base/values.h"
+#include "net/base/backoff_entry.h"
+#include "net/reporting/reporting_cache.h"
+#include "net/reporting/reporting_report.h"
+#include "net/reporting/reporting_test_util.h"
+#include "net/reporting/reporting_uploader.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+#include "url/origin.h"
+
+namespace net {
+namespace {
+
+class MockUploader : public ReportingUploader {
+ public:
+  class PendingUpload {
+   public:
+    PendingUpload(MockUploader* uploader,
+                  const GURL& url,
+                  const std::string& json,
+                  const Callback& callback)
+        : uploader_(uploader), url_(url), json_(json), callback_(callback) {
+      DCHECK(uploader_);
+    }
+
+    ~PendingUpload() {}
+
+    void Complete(Outcome outcome) {
+      callback_.Run(outcome);
+      // Deletes |this|.
+      uploader_->OnUploadComplete(this);
+    }
+
+    const GURL& url() const { return url_; }
+    const std::string& json() const { return json_; }
+
+    std::unique_ptr<base::Value> GetValue() const {
+      return base::JSONReader::Read(json_);
+    }
+
+   private:
+    MockUploader* uploader_;
+    GURL url_;
+    std::string json_;
+    Callback callback_;
+  };
+
+  MockUploader() {}
+  ~MockUploader() override {}
+
+  void StartUpload(const GURL& url,
+                   const std::string& json,
+                   const Callback& callback) override {
+    uploads_.push_back(
+        base::MakeUnique<PendingUpload>(this, url, json, callback));
+  }
+
+  const std::vector<std::unique_ptr<PendingUpload>>& pending_uploads() const {
+    return uploads_;
+  }
+
+  void OnUploadComplete(PendingUpload* upload) {
+    for (auto it = uploads_.begin(); it != uploads_.end(); ++it) {
+      if (it->get() == upload) {
+        uploads_.erase(it);
+        return;
+      }
+    }
+    NOTREACHED();
+  }
+
+ private:
+  std::vector<std::unique_ptr<PendingUpload>> uploads_;
+};
+
+class ReportingDeliveryAgentTest : public ::testing::Test {
+ protected:
+  ReportingDeliveryAgentTest()
+      : agent_(&clock_, &cache_, &uploader_, &backoff_policy_) {
+    backoff_policy_.num_errors_to_ignore = 0;
+    backoff_policy_.initial_delay_ms = 60000;
+    backoff_policy_.multiply_factor = 2.0;
+    backoff_policy_.jitter_factor = 0.0;
+    backoff_policy_.maximum_backoff_ms = -1;
+    backoff_policy_.entry_lifetime_ms = 0;
+    backoff_policy_.always_use_initial_delay = false;
+  }
+
+  base::TimeTicks tomorrow() {
+    return clock_.NowTicks() + base::TimeDelta::FromDays(1);
+  }
+
+  const std::vector<std::unique_ptr<MockUploader::PendingUpload>>&
+  pending_uploads() const {
+    return uploader_.pending_uploads();
+  }
+
+  const GURL kUrl_ = GURL("https://origin/path");
+  const url::Origin kOrigin_ = url::Origin(GURL("https://origin/"));
+  const GURL kEndpoint_ = GURL("https://endpoint/");
+  const std::string kGroup_ = "group";
+  const std::string kType_ = "type";
+
+  base::SimpleTestTickClock clock_;
+  ReportingCache cache_;
+  MockUploader uploader_;
+  BackoffEntry::Policy backoff_policy_;
+  ReportingDeliveryAgent agent_;
+};
+
+TEST_F(ReportingDeliveryAgentTest, SuccessfulUpload) {
+  static const int kAgeMillis = 12345;
+
+  base::DictionaryValue body;
+  body.SetString("key", "value");
+
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.AddReport(kUrl_, kGroup_, kType_, body.CreateDeepCopy(),
+                   clock_.NowTicks(), 0);
+
+  clock_.Advance(base::TimeDelta::FromMilliseconds(kAgeMillis));
+
+  agent_.SendReports();
+
+  ASSERT_EQ(1u, pending_uploads().size());
+  EXPECT_EQ(kEndpoint_, pending_uploads()[0]->url());
+  {
+    auto value = pending_uploads()[0]->GetValue();
+
+    base::ListValue* list;
+    ASSERT_TRUE(value->GetAsList(&list));
+    EXPECT_EQ(1u, list->GetSize());
+
+    base::DictionaryValue* report;
+    ASSERT_TRUE(list->GetDictionary(0, &report));
+    EXPECT_EQ(4u, report->size());
+
+    ExpectDictIntegerValue(kAgeMillis, *report, "age");
+    ExpectDictStringValue(kType_, *report, "type");
+    ExpectDictStringValue(kUrl_.spec(), *report, "url");
+    ExpectDictDictionaryValue(body, *report, "report");
+  }
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::SUCCESS);
+
+  // Successful upload should remove delivered reports.
+  std::vector<const ReportingReport*> reports;
+  cache_.GetReports(&reports);
+  EXPECT_TRUE(reports.empty());
+
+  // TODO(juliatuttle): Check that BackoffEntry was informed of success.
+}
+
+TEST_F(ReportingDeliveryAgentTest, FailedUpload) {
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+
+  ASSERT_EQ(1u, pending_uploads().size());
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::FAILURE);
+
+  // Failed upload should increment reports' attempts.
+  std::vector<const ReportingReport*> reports;
+  cache_.GetReports(&reports);
+  ASSERT_EQ(1u, reports.size());
+  EXPECT_EQ(1, reports[0]->attempts);
+
+  // Since endpoint is now failing, an upload won't be started despite a pending
+  // report.
+  ASSERT_TRUE(pending_uploads().empty());
+  agent_.SendReports();
+  EXPECT_TRUE(pending_uploads().empty());
+}
+
+TEST_F(ReportingDeliveryAgentTest, RemoveEndpointUpload) {
+  static const url::Origin kDifferentOrigin(GURL("https://origin2/"));
+
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.SetClient(kDifferentOrigin, kEndpoint_,
+                   ReportingClient::Subdomains::EXCLUDE, kGroup_, tomorrow());
+  ASSERT_TRUE(FindClientInCache(&cache_, kOrigin_, kEndpoint_));
+  ASSERT_TRUE(FindClientInCache(&cache_, kDifferentOrigin, kEndpoint_));
+
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+
+  ASSERT_EQ(1u, pending_uploads().size());
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::REMOVE_ENDPOINT);
+
+  // "Remove endpoint" upload should remove endpoint from *all* origins and
+  // increment reports' attempts.
+  std::vector<const ReportingReport*> reports;
+  cache_.GetReports(&reports);
+  ASSERT_EQ(1u, reports.size());
+  EXPECT_EQ(1, reports[0]->attempts);
+
+  EXPECT_FALSE(FindClientInCache(&cache_, kOrigin_, kEndpoint_));
+  EXPECT_FALSE(FindClientInCache(&cache_, kDifferentOrigin, kEndpoint_));
+
+  // Since endpoint is now failing, an upload won't be started despite a pending
+  // report.
+  agent_.SendReports();
+  EXPECT_TRUE(pending_uploads().empty());
+}
+
+TEST_F(ReportingDeliveryAgentTest, ConcurrentRemove) {
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+  ASSERT_EQ(1u, pending_uploads().size());
+
+  // Remove the report while the upload is running.
+  std::vector<const ReportingReport*> reports;
+  cache_.GetReports(&reports);
+  EXPECT_EQ(1u, reports.size());
+
+  const ReportingReport* report = reports[0];
+  EXPECT_FALSE(cache_.IsReportDoomedForTesting(report));
+
+  // Report should appear removed, even though the cache has doomed it.
+  cache_.RemoveReports(reports);
+  cache_.GetReports(&reports);
+  EXPECT_TRUE(reports.empty());
+  EXPECT_TRUE(cache_.IsReportDoomedForTesting(report));
+
+  // Completing upload shouldn't crash, and report should still be gone.
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::SUCCESS);
+  cache_.GetReports(&reports);
+  EXPECT_TRUE(reports.empty());
+  // This is slightly sketchy since |report| has been freed, but it nonetheless
+  // should not be in the set of doomed reports.
+  EXPECT_FALSE(cache_.IsReportDoomedForTesting(report));
+}
+
+// Test that the agent will combine reports destined for the same endpoint, even
+// if the reports are from different origins.
+TEST_F(ReportingDeliveryAgentTest,
+       BatchReportsFromDifferentOriginsToSameEndpoint) {
+  static const GURL kDifferentUrl("https://origin2/path");
+  static const url::Origin kDifferentOrigin(kDifferentUrl);
+
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.SetClient(kDifferentOrigin, kEndpoint_,
+                   ReportingClient::Subdomains::EXCLUDE, kGroup_, tomorrow());
+
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+  cache_.AddReport(kDifferentUrl, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+  ASSERT_EQ(1u, pending_uploads().size());
+
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::SUCCESS);
+  EXPECT_EQ(0u, pending_uploads().size());
+}
+
+// Test that the agent won't start a second upload to the same endpoint (even
+// for a different origin) while one is pending, but will once it is no longer
+// pending.
+TEST_F(ReportingDeliveryAgentTest, SerializeUploadsToEndpoint) {
+  static const GURL kDifferentUrl("https://origin2/path");
+  static const url::Origin kDifferentOrigin(kDifferentUrl);
+
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.SetClient(kDifferentOrigin, kEndpoint_,
+                   ReportingClient::Subdomains::EXCLUDE, kGroup_, tomorrow());
+
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+  EXPECT_EQ(1u, pending_uploads().size());
+
+  cache_.AddReport(kDifferentUrl, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+  ASSERT_EQ(1u, pending_uploads().size());
+
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::SUCCESS);
+  EXPECT_EQ(0u, pending_uploads().size());
+
+  agent_.SendReports();
+  ASSERT_EQ(1u, pending_uploads().size());
+
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::SUCCESS);
+  EXPECT_EQ(0u, pending_uploads().size());
+}
+
+// Test that the agent won't start a second upload for an (origin, group) while
+// one is pending, even if a different endpoint is available, but will once the
+// original delivery is complete and the (origin, group) is no longer pending.
+TEST_F(ReportingDeliveryAgentTest, SerializeUploadsToGroup) {
+  static const GURL kDifferentEndpoint("https://endpoint2/");
+
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.SetClient(kOrigin_, kDifferentEndpoint,
+                   ReportingClient::Subdomains::EXCLUDE, kGroup_, tomorrow());
+
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+  EXPECT_EQ(1u, pending_uploads().size());
+
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+  EXPECT_EQ(1u, pending_uploads().size());
+
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::SUCCESS);
+  EXPECT_EQ(0u, pending_uploads().size());
+
+  agent_.SendReports();
+  EXPECT_EQ(1u, pending_uploads().size());
+}
+
+// Tests that the agent will start parallel uploads to different groups within
+// the same origin.
+TEST_F(ReportingDeliveryAgentTest, ParallelizeUploadsAcrossGroups) {
+  static const GURL kDifferentEndpoint("https://endpoint2/");
+  static const std::string kDifferentGroup("group2");
+
+  cache_.SetClient(kOrigin_, kEndpoint_, ReportingClient::Subdomains::EXCLUDE,
+                   kGroup_, tomorrow());
+  cache_.SetClient(kOrigin_, kDifferentEndpoint,
+                   ReportingClient::Subdomains::EXCLUDE, kDifferentGroup,
+                   tomorrow());
+
+  cache_.AddReport(kUrl_, kGroup_, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+  cache_.AddReport(kUrl_, kDifferentGroup, kType_,
+                   base::MakeUnique<base::DictionaryValue>(), clock_.NowTicks(),
+                   0);
+
+  agent_.SendReports();
+  EXPECT_EQ(2u, pending_uploads().size());
+
+  pending_uploads()[1]->Complete(ReportingUploader::Outcome::SUCCESS);
+  pending_uploads()[0]->Complete(ReportingUploader::Outcome::SUCCESS);
+  EXPECT_EQ(0u, pending_uploads().size());
+}
+
+}  // namespace
+}  // namespace net