[Sync] Creating sync_sessions component, moving revisit logic.

components/sync_driver/revisit/offset_tab_matcher_unittest.cc

Index: components/sync_driver/revisit/offset_tab_matcher_unittest.cc
diff --git a/components/sync_driver/revisit/offset_tab_matcher_unittest.cc b/components/sync_driver/revisit/offset_tab_matcher_unittest.cc
deleted file mode 100644
index bcfe2bb6fdea0ad9c561830a0613019c0b685673..0000000000000000000000000000000000000000
--- a/components/sync_driver/revisit/offset_tab_matcher_unittest.cc
+++ /dev/null
@@ -1,186 +0,0 @@
-// 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 "components/sync_driver/revisit/offset_tab_matcher.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "base/test/histogram_tester.h"
-#include "base/time/time.h"
-#include "components/sessions/core/serialized_navigation_entry.h"
-#include "components/sessions/core/serialized_navigation_entry_test_helper.h"
-#include "components/sessions/core/session_types.h"
-#include "components/sync_driver/revisit/page_equality.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "url/gurl.h"
-
-using sessions::SessionTab;
-
-namespace sync_driver {
-
-namespace {
-
-static const std::string kExampleUrl = "http://www.example.com";
-static const std::string kDifferentUrl = "http://www.different.com";
-
-sessions::SerializedNavigationEntry Entry(const std::string& url) {
-  return sessions::SerializedNavigationEntryTestHelper::CreateNavigation(url,
-                                                                         "");
-}
-
-scoped_ptr<SessionTab> Tab(const int index,
-                           const base::Time timestamp = base::Time::Now()) {
-  scoped_ptr<SessionTab> tab(new SessionTab());
-  tab->current_navigation_index = index;
-  tab->timestamp = timestamp;
-  return tab;
-}
-
-void VerifyMatch(OffsetTabMatcher& matcher, const int offset) {
-  base::HistogramTester histogram_tester;
-  matcher.Emit(PageVisitObserver::kTransitionPage);
-  histogram_tester.ExpectUniqueSample("Sync.PageRevisitNavigationMatchOffset",
-                                      offset, 1);
-  histogram_tester.ExpectUniqueSample(
-      "Sync.PageRevisitNavigationMatchTransition",
-      PageVisitObserver::kTransitionPage, 1);
-  histogram_tester.ExpectTotalCount("Sync.PageRevisitNavigationMatchAge", 1);
-}
-
-void VerifyMiss(OffsetTabMatcher& matcher) {
-  base::HistogramTester histogram_tester;
-  matcher.Emit(PageVisitObserver::kTransitionPage);
-  histogram_tester.ExpectUniqueSample(
-      "Sync.PageRevisitNavigationMissTransition",
-      PageVisitObserver::kTransitionPage, 1);
-}
-
-}  // namespace
-
-TEST(OffsetTabMatcherTest, NoCheck) {
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  VerifyMiss(matcher);
-}
-
-TEST(OffsetTabMatcherTest, EmptyTab) {
-  scoped_ptr<SessionTab> tab = Tab(0);
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  VerifyMiss(matcher);
-}
-
-TEST(OffsetTabMatcherTest, HasMatchForward) {
-  scoped_ptr<SessionTab> tab = Tab(0);
-  tab->navigations.push_back(Entry(kDifferentUrl));
-  tab->navigations.push_back(Entry(kExampleUrl));
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  VerifyMatch(matcher, 1);
-}
-
-TEST(OffsetTabMatcherTest, HasMatchBackward) {
-  scoped_ptr<SessionTab> tab = Tab(1);
-  tab->navigations.push_back(Entry(kExampleUrl));
-  tab->navigations.push_back(Entry(kDifferentUrl));
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  VerifyMatch(matcher, -1);
-}
-
-TEST(OffsetTabMatcherTest, NoMatch) {
-  scoped_ptr<SessionTab> tab = Tab(0);
-  tab->navigations.push_back(Entry(kExampleUrl));
-  tab->navigations.push_back(Entry(kDifferentUrl));
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  VerifyMiss(matcher);
-}
-
-TEST(OffsetTabMatcherTest, MultipleBackwardOffsets) {
-  scoped_ptr<SessionTab> tab = Tab(4);
-  tab->navigations.push_back(Entry(kExampleUrl));
-  tab->navigations.push_back(Entry(kExampleUrl));
-  tab->navigations.push_back(Entry(kExampleUrl));  // Expected.
-  tab->navigations.push_back(Entry(kDifferentUrl));
-  tab->navigations.push_back(Entry(kExampleUrl));  // Current.
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  VerifyMatch(matcher, -2);
-}
-
-TEST(OffsetTabMatcherTest, MultipleOffsets) {
-  scoped_ptr<SessionTab> tab = Tab(1);
-  tab->navigations.push_back(Entry(kExampleUrl));
-  tab->navigations.push_back(Entry(kExampleUrl));  // Current.
-  tab->navigations.push_back(Entry(kExampleUrl));
-  tab->navigations.push_back(Entry(kExampleUrl));  // Expected.
-  tab->navigations.push_back(Entry(kDifferentUrl));
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  VerifyMatch(matcher, 2);
-}
-
-TEST(OffsetTabMatcherTest, VeryForwardOffset) {
-  scoped_ptr<SessionTab> tab = Tab(0);
-  for (int i = 0; i < 20; i++) {
-    tab->navigations.push_back(Entry(kDifferentUrl));
-  }
-  tab->navigations.push_back(Entry(kExampleUrl));
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  // Expect the offset to be clamped to +10.
-  VerifyMatch(matcher, 10);
-}
-
-TEST(OffsetTabMatcherTest, VeryBackwardOffset) {
-  scoped_ptr<SessionTab> tab = Tab(20);
-  tab->navigations.push_back(Entry(kExampleUrl));
-  for (int i = 0; i < 20; i++) {
-    tab->navigations.push_back(Entry(kDifferentUrl));
-  }
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab.get());
-  // Expect the offset to be clamped to -10.
-  VerifyMatch(matcher, -10);
-}
-
-TEST(OffsetTabMatcherTest, MultipleTabs) {
-  scoped_ptr<SessionTab> tab1 = Tab(0, base::Time::UnixEpoch());
-  tab1->navigations.push_back(Entry(kExampleUrl));
-  tab1->navigations.push_back(Entry(kExampleUrl));
-
-  scoped_ptr<SessionTab> tab2 = Tab(1, base::Time::Now());
-  tab2->navigations.push_back(Entry(kExampleUrl));
-  tab2->navigations.push_back(Entry(kExampleUrl));
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab1.get());
-  matcher.Check(tab2.get());
-  VerifyMatch(matcher, -1);
-}
-
-TEST(OffsetTabMatcherTest, MultipleTabsSameTime) {
-  base::Time shared_now = base::Time::Now();
-
-  scoped_ptr<SessionTab> tab1 = Tab(0, shared_now);
-  tab1->navigations.push_back(Entry(kExampleUrl));
-  tab1->navigations.push_back(Entry(kExampleUrl));
-
-  scoped_ptr<SessionTab> tab2 = Tab(1, shared_now);
-  tab2->navigations.push_back(Entry(kExampleUrl));
-  tab2->navigations.push_back(Entry(kExampleUrl));
-
-  OffsetTabMatcher matcher((PageEquality(GURL(kExampleUrl))));
-  matcher.Check(tab1.get());
-  matcher.Check(tab2.get());
-  VerifyMatch(matcher, 1);
-}
-
-}  // namespace sync_driver