Move common PVer4 code into a V4ProtocolManagerUtil class.

components/safe_browsing_db/v4_protocol_manager_util_unittest.cc

+// Copyright 2016 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 <vector>
+
+#include "base/base64.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "components/safe_browsing_db/v4_protocol_manager_util.h"
+#include "net/base/escape.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using base::Time;
+using base::TimeDelta;
+
+namespace {
+
+const char kClient[] = "unittest";
+const char kAppVer[] = "1.0";
+const char kKeyParam[] = "test_key_param";
+
+}  // namespace
+
+namespace safe_browsing {
+
+class SafeBrowsingV4ProtocolManagerUtilTest : public testing::Test {
+ protected:
+  void PopulateV4ProtocolConfig(V4ProtocolConfig* config) {
+    config->client_name = kClient;
+    config->version = kAppVer;
+    config->key_param = kKeyParam;
+  }
+};
+
+TEST_F(SafeBrowsingV4ProtocolManagerUtilTest, TestBackOffLogic) {
+  size_t error_count = 0, back_off_multiplier = 1;
+
+  // 1 error.
+  base::TimeDelta next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(1U, error_count);
+  EXPECT_EQ(1U, back_off_multiplier);
+  EXPECT_LE(TimeDelta::FromMinutes(15), next);
+  EXPECT_GE(TimeDelta::FromMinutes(30), next);
+
+  // 2 errors.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(2U, error_count);
+  EXPECT_EQ(2U, back_off_multiplier);
+  EXPECT_LE(TimeDelta::FromMinutes(30), next);
+  EXPECT_GE(TimeDelta::FromMinutes(60), next);
+
+  // 3 errors.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(3U, error_count);
+  EXPECT_EQ(4U, back_off_multiplier);
+  EXPECT_LE(TimeDelta::FromMinutes(60), next);
+  EXPECT_GE(TimeDelta::FromMinutes(120), next);
+
+  // 4 errors.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(4U, error_count);
+  EXPECT_EQ(8U, back_off_multiplier);
+  EXPECT_LE(TimeDelta::FromMinutes(120), next);
+  EXPECT_GE(TimeDelta::FromMinutes(240), next);
+
+  // 5 errors.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(5U, error_count);
+  EXPECT_EQ(16U, back_off_multiplier);
+  EXPECT_LE(TimeDelta::FromMinutes(240), next);
+  EXPECT_GE(TimeDelta::FromMinutes(480), next);
+
+  // 6 errors.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(6U, error_count);
+  EXPECT_EQ(32U, back_off_multiplier);
+  EXPECT_LE(TimeDelta::FromMinutes(480), next);
+  EXPECT_GE(TimeDelta::FromMinutes(960), next);
+
+  // 7 errors.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(7U, error_count);
+  EXPECT_EQ(64U, back_off_multiplier);
+  EXPECT_LE(TimeDelta::FromMinutes(960), next);
+  EXPECT_GE(TimeDelta::FromMinutes(1920), next);
+
+  // 8 errors, reached max backoff.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(8U, error_count);
+  EXPECT_EQ(128U, back_off_multiplier);
+  EXPECT_EQ(TimeDelta::FromHours(24), next);
+
+  // 9 errors, reached max backoff and multiplier capped.
+  next = V4ProtocolManagerUtil::GetNextBackOffInterval(
+      &error_count, &back_off_multiplier);
+  EXPECT_EQ(9U, error_count);
+  EXPECT_EQ(128U, back_off_multiplier);
+  EXPECT_EQ(TimeDelta::FromHours(24), next);
+}
+
+TEST_F(SafeBrowsingV4ProtocolManagerUtilTest, TestGetRequestUrl) {
+  V4ProtocolConfig config;
+  PopulateV4ProtocolConfig(&config);
+
+  std::string expectedUrl =
+      "https://safebrowsing.googleapis.com/v4/someMethod/request_base64?"
+      "alt=proto&client_id=unittest&client_version=1.0&key=test_key_param";
+  EXPECT_EQ(expectedUrl, V4ProtocolManagerUtil::GetRequestUrl(
+                             "request_base64", "someMethod", config)
+                             .spec());
+}
+
+}  // namespace safe_browsing