Save Android Autofill credentials in the right format.

components/password_manager/core/browser/password_syncable_service_unittest.cc

Index: components/password_manager/core/browser/password_syncable_service_unittest.cc
diff --git a/components/password_manager/core/browser/password_syncable_service_unittest.cc b/components/password_manager/core/browser/password_syncable_service_unittest.cc
index aa55f28b5499c2a0793869c466230b606389cac4..c487e6682cc49ea0d8e4d69edda91ff008d4dcea 100644
--- a/components/password_manager/core/browser/password_syncable_service_unittest.cc
+++ b/components/password_manager/core/browser/password_syncable_service_unittest.cc
@@ -14,9 +14,11 @@
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_task_environment.h"
+#include "base/test/simple_test_clock.h"
 #include "components/password_manager/core/browser/mock_password_store.h"
+#include "components/password_manager/core/browser/password_manager_test_utils.h"
 #include "components/sync/model/sync_change_processor.h"
 #include "components/sync/model/sync_error.h"
 #include "components/sync/model/sync_error_factory_mock.h"
@@ -51,17 +53,19 @@ std::string MakePasswordSyncTag(const autofill::PasswordForm& password);
 namespace {
 
 // PasswordForm values for tests.
-const autofill::PasswordForm::Type kArbitraryType =
+constexpr autofill::PasswordForm::Type kArbitraryType =
     autofill::PasswordForm::TYPE_GENERATED;
-const char kIconUrl[] = "https://fb.com/Icon";
-const char kDisplayName[] = "Agent Smith";
-const char kFederationUrl[] = "https://fb.com/";
-const char kPassword[] = "abcdef";
-const char kSignonRealm[] = "abc";
-const char kSignonRealm2[] = "def";
-const char kSignonRealm3[] = "xyz";
-const int kTimesUsed = 5;
-const char kUsername[] = "godzilla";
+constexpr char kAndroidAutofillRealm[] = "android://hash@com.magisto";
+constexpr char kAndroidCorrectRealm[] = "android://hash@com.magisto/";
+constexpr char kIconUrl[] = "https://fb.com/Icon";
+constexpr char kDisplayName[] = "Agent Smith";
+constexpr char kFederationUrl[] = "https://fb.com/";
+constexpr char kPassword[] = "abcdef";
+constexpr char kSignonRealm[] = "abc";
+constexpr char kSignonRealm2[] = "def";
+constexpr char kSignonRealm3[] = "xyz";
+constexpr int kTimesUsed = 5;
+constexpr char kUsername[] = "godzilla";
 
 typedef std::vector<SyncChange> SyncChangeList;
 
@@ -70,8 +74,8 @@ const sync_pb::PasswordSpecificsData& GetPasswordSpecifics(
   return sync_data.GetSpecifics().password().client_only_encrypted_data();
 }
 
-MATCHER(HasDateSynced, "") {
-  return !arg.date_synced.is_null() && !arg.date_synced.is_max();
+MATCHER_P(HasDateSynced, time, "") {
+  return arg.date_synced == time;
 }
 
 MATCHER_P(PasswordIs, form, "") {
@@ -124,6 +128,14 @@ ACTION_P(AppendForm, form) {
   return true;
 }
 
+// The argument is std::vector<autofill::PasswordForm*>*. The caller is
+// responsible for the lifetime of all the password forms.
+ACTION_P(AppendForms, forms) {
+  for (const autofill::PasswordForm& form : forms)
+    arg0->push_back(base::MakeUnique<autofill::PasswordForm>(form));
+  return true;
+}
+
 // Creates a sync data consisting of password specifics. The sign on realm is
 // set to |signon_realm|.
 SyncData CreateSyncData(const std::string& signon_realm) {
@@ -149,19 +161,6 @@ SyncChange CreateSyncChange(const autofill::PasswordForm& password,
   return SyncChange(FROM_HERE, type, data);
 }
 
-// A testable implementation of the |PasswordSyncableService| that mocks
-// out all interaction with the password database.
-class MockPasswordSyncableService : public PasswordSyncableService {
- public:
-  explicit MockPasswordSyncableService(PasswordStoreSync* password_store)
-      : PasswordSyncableService(password_store) {}
-
-  MOCK_METHOD1(StartSyncFlare, void(syncer::ModelType));
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockPasswordSyncableService);
-};
-
 // Mock implementation of SyncChangeProcessor.
 class MockSyncChangeProcessor : public syncer::SyncChangeProcessor {
  public:
@@ -186,12 +185,15 @@ class PasswordSyncableServiceWrapper {
   PasswordSyncableServiceWrapper() {
     password_store_ = new testing::StrictMock<MockPasswordStore>;
     service_.reset(
-        new MockPasswordSyncableService(password_store_->GetSyncInterface()));
-    ON_CALL(*password_store_, AddLoginImpl(HasDateSynced()))
+        new PasswordSyncableService(password_store_->GetSyncInterface()));
+    auto clock = base::MakeUnique<base::SimpleTestClock>();
+    clock->SetNow(time());
+    service_->set_clock(std::move(clock));
+    ON_CALL(*password_store_, AddLoginImpl(HasDateSynced(time())))
         .WillByDefault(Return(PasswordStoreChangeList()));
     ON_CALL(*password_store_, RemoveLoginImpl(_))
         .WillByDefault(Return(PasswordStoreChangeList()));
-    ON_CALL(*password_store_, UpdateLoginImpl(HasDateSynced()))
+    ON_CALL(*password_store_, UpdateLoginImpl(HasDateSynced(time())))
         .WillByDefault(Return(PasswordStoreChangeList()));
     EXPECT_CALL(*password_store(), NotifyLoginsChanged(_)).Times(AnyNumber());
   }
@@ -200,7 +202,9 @@ class PasswordSyncableServiceWrapper {
 
   MockPasswordStore* password_store() { return password_store_.get(); }
 
-  MockPasswordSyncableService* service() { return service_.get(); }
+  PasswordSyncableService* service() { return service_.get(); }
+
+  static base::Time time() { return base::Time::FromInternalValue(100000); }
 
   // Returnes the scoped_ptr to |service_| thus NULLing out it.
   std::unique_ptr<syncer::SyncChangeProcessor> ReleaseSyncableService() {
@@ -209,7 +213,7 @@ class PasswordSyncableServiceWrapper {
 
  private:
   scoped_refptr<MockPasswordStore> password_store_;
-  std::unique_ptr<MockPasswordSyncableService> service_;
+  std::unique_ptr<PasswordSyncableService> service_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordSyncableServiceWrapper);
 };
@@ -222,13 +226,15 @@ class PasswordSyncableServiceTest : public testing::Test {
         .WillByDefault(Return(SyncError()));
   }
   MockPasswordStore* password_store() { return wrapper_.password_store(); }
-  MockPasswordSyncableService* service() { return wrapper_.service(); }
+  PasswordSyncableService* service() { return wrapper_.service(); }
+
+  MOCK_METHOD1(StartSyncFlare, void(syncer::ModelType));
 
  protected:
-  base::MessageLoop message_loop_;
   std::unique_ptr<MockSyncChangeProcessor> processor_;
 
  private:
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
   PasswordSyncableServiceWrapper wrapper_;
 };
 
@@ -488,10 +494,9 @@ TEST_F(PasswordSyncableServiceTest, StartSyncFlare) {
   service()->ActOnPasswordStoreChanges(list);
 
   // Set the flare. It should be called as there is no SyncChangeProcessor.
-  service()->InjectStartSyncFlare(
-      base::Bind(&MockPasswordSyncableService::StartSyncFlare,
-                 base::Unretained(service())));
-  EXPECT_CALL(*service(), StartSyncFlare(syncer::PASSWORDS));
+  service()->InjectStartSyncFlare(base::Bind(
+      &PasswordSyncableServiceTest::StartSyncFlare, base::Unretained(this)));
+  EXPECT_CALL(*this, StartSyncFlare(syncer::PASSWORDS));
   service()->ActOnPasswordStoreChanges(list);
 }
 
@@ -673,6 +678,550 @@ TEST_F(PasswordSyncableServiceTest, SerializeNonEmptyPasswordForm) {
   EXPECT_EQ("https://google.com", specifics.federation_url());
 }
 
+// Tests for Android Autofill credentials. Those are saved in the wrong format
+// without trailing '/'. Nevertheless, password store should always contain the
+// correct values.
+class PasswordSyncableServiceAndroidAutofillTest : public testing::Test {
+ public:
+  PasswordSyncableServiceAndroidAutofillTest() = default;
+
+  static PasswordFormData android_incorrect(double creation_time) {
+    PasswordFormData data = {autofill::PasswordForm::SCHEME_HTML,
+                             kAndroidAutofillRealm,
+                             kAndroidAutofillRealm,
+                             "",
+                             L"",
+                             L"",
+                             L"",
+                             L"username_value_1",
+                             L"11111",
+                             true,
+                             creation_time};
+    return data;
+  }
+
+  static PasswordFormData android_correct(double creation_time) {
+    PasswordFormData data = {autofill::PasswordForm::SCHEME_HTML,
+                             kAndroidCorrectRealm,
+                             kAndroidCorrectRealm,
+                             "",
+                             L"",
+                             L"",
+                             L"",
+                             L"username_value_1",
+                             L"22222",
+                             true,
+                             creation_time};
+    return data;
+  }
+
+  static PasswordFormData android_incorrect2(double creation_time) {
+    PasswordFormData data = {autofill::PasswordForm::SCHEME_HTML,
+                             kAndroidAutofillRealm,
+                             kAndroidAutofillRealm,
+                             "",
+                             L"",
+                             L"",
+                             L"",
+                             L"username_value_1",
+                             L"33333",
+                             false,
+                             creation_time};
+    return data;
+  }
+
+  static PasswordFormData android_correct2(double creation_time) {
+    PasswordFormData data = {autofill::PasswordForm::SCHEME_HTML,
+                             kAndroidCorrectRealm,
+                             kAndroidCorrectRealm,
+                             "",
+                             L"",
+                             L"",
+                             L"",
+                             L"username_value_1",
+                             L"444444",
+                             false,
+                             creation_time};
+    return data;
+  }
+
+  static autofill::PasswordForm FormWithCorrectTag(PasswordFormData data) {
+    autofill::PasswordForm form = *CreatePasswordFormFromDataForTesting(data);
+    form.signon_realm = kAndroidCorrectRealm;
+    form.origin = GURL(kAndroidCorrectRealm);
+    form.date_synced = PasswordSyncableServiceWrapper::time();
+    return form;
+  }
+
+  static autofill::PasswordForm FormWithAndroidAutofillTag(
+      PasswordFormData data) {
+    autofill::PasswordForm form = *CreatePasswordFormFromDataForTesting(data);
+    form.signon_realm = kAndroidAutofillRealm;
+    form.origin = GURL(kAndroidAutofillRealm);
+    form.date_synced = PasswordSyncableServiceWrapper::time();
+    return form;
+  }
+
+  // Transforms |val| into |count| numbers from 1 to |count| inclusive.
+  static std::vector<unsigned> ExtractTimestamps(unsigned val, unsigned count) {
+    std::vector<unsigned> result;
+    for (unsigned i = 0; i < count; ++i) {
+      result.push_back(val % count + 1);
+      val /= count;
+    }
+    return result;
+  }
+
+  static testing::Message FormDataMessage(const std::string& prefix,
+                                          const PasswordFormData* data) {
+    testing::Message message;
+    message << prefix;
+    if (data)
+      message << *CreatePasswordFormFromDataForTesting(*data);
+    else
+      message << "NULL";
+    return message;
+  }
+
+ protected:
+  base::test::ScopedTaskEnvironment scoped_task_environment_;
+};
+
+TEST_F(PasswordSyncableServiceAndroidAutofillTest, FourWayMerge) {
+  for (unsigned val = 0; val < 4 * 4 * 4 * 4; ++val) {
+    // Generate 4 creation timestamps for all the entries.
+    std::vector<unsigned> dates = ExtractTimestamps(val, 4);
+    ASSERT_EQ(4u, dates.size());
+    const unsigned latest = *std::max_element(dates.begin(), dates.end());
+    // Sync correct, Sync Android autofill, local correct, local incorrect.
+    const PasswordFormData data[4] = {
+        android_correct(dates[0]), android_incorrect(dates[1]),
+        android_correct2(dates[2]), android_incorrect2(dates[3])};
+    const PasswordFormData* latest_data =
+        std::find_if(data, data + 4, [latest](const PasswordFormData& data) {
+          return data.creation_time == latest;
+        });
+    ASSERT_TRUE(latest_data);
+    std::vector<autofill::PasswordForm> expected_sync_updates;
+    if (latest_data != &data[0])
+      expected_sync_updates.push_back(FormWithCorrectTag(*latest_data));
+    if (latest_data != &data[1])
+      expected_sync_updates.push_back(FormWithAndroidAutofillTag(*latest_data));
+    autofill::PasswordForm local_correct =
+        *CreatePasswordFormFromDataForTesting(data[2]);
+    autofill::PasswordForm local_incorrect =
+        *CreatePasswordFormFromDataForTesting(data[3]);
+    syncer::SyncData sync_correct =
+        SyncDataFromPassword(*CreatePasswordFormFromDataForTesting(data[0]));
+    syncer::SyncData sync_incorrect =
+        SyncDataFromPassword(*CreatePasswordFormFromDataForTesting(data[1]));
+
+    SCOPED_TRACE(*CreatePasswordFormFromDataForTesting(data[0]));
+    SCOPED_TRACE(*CreatePasswordFormFromDataForTesting(data[1]));
+    SCOPED_TRACE(*CreatePasswordFormFromDataForTesting(data[2]));
+    SCOPED_TRACE(*CreatePasswordFormFromDataForTesting(data[3]));
+
+    for (bool correct_sync_first : {true, false}) {
+      auto wrapper = base::MakeUnique<PasswordSyncableServiceWrapper>();
+      auto processor =
+          base::MakeUnique<testing::StrictMock<MockSyncChangeProcessor>>();
+
+      std::vector<autofill::PasswordForm> stored_forms = {local_correct,
+                                                          local_incorrect};
+      EXPECT_CALL(*wrapper->password_store(), FillAutofillableLogins(_))
+          .WillOnce(AppendForms(stored_forms));
+      EXPECT_CALL(*wrapper->password_store(), FillBlacklistLogins(_))
+          .WillOnce(Return(true));
+      if (latest_data != &data[2]) {
+        EXPECT_CALL(*wrapper->password_store(),
+                    UpdateLoginImpl(FormWithCorrectTag(*latest_data)));
+      }
+      if (latest_data != &data[3]) {
+        EXPECT_CALL(*wrapper->password_store(),
+                    UpdateLoginImpl(FormWithAndroidAutofillTag(*latest_data)));
+      }
+
+      if (expected_sync_updates.size() == 1) {
+        EXPECT_CALL(*processor,
+                    ProcessSyncChanges(_, ElementsAre(SyncChangeIs(
+                                              SyncChange::ACTION_UPDATE,
+                                              expected_sync_updates[0]))));
+      } else {
+        EXPECT_CALL(
+            *processor,
+            ProcessSyncChanges(_, UnorderedElementsAre(
+                                      SyncChangeIs(SyncChange::ACTION_UPDATE,
+                                                   expected_sync_updates[0]),
+                                      SyncChangeIs(SyncChange::ACTION_UPDATE,
+                                                   expected_sync_updates[1]))));
+      }
+
+      SyncDataList sync_list = {sync_correct, sync_incorrect};
+      if (!correct_sync_first)
+        std::swap(sync_list[0], sync_list[1]);
+      wrapper->service()->MergeDataAndStartSyncing(
+          syncer::PASSWORDS, sync_list, std::move(processor),
+          std::unique_ptr<syncer::SyncErrorFactory>());
+      wrapper.reset();
+      // Wait til PasswordStore is destroy end therefore all the expectations on
+      // it are checked.
+      scoped_task_environment_.RunUntilIdle();
+    }
+  }
+}
+
+TEST_F(PasswordSyncableServiceAndroidAutofillTest, ThreeWayMerge) {
+  for (int j = 0; j < 4; ++j) {
+    // Whether the entry exists: Sync correct, Sync Android autofill,
+    // local correct, local incorrect.
+    bool entry_present[4] = {true, true, true, true};
+    entry_present[j] = false;
+    for (unsigned val = 0; val < 3 * 3 * 3; ++val) {
+      // Generate 3 creation timestamps for all the entries.
+      std::vector<unsigned> dates = ExtractTimestamps(val, 3);
+      ASSERT_EQ(3u, dates.size());
+      const unsigned latest = *std::max_element(dates.begin(), dates.end());
+
+      // Sync correct, Sync Android autofill, local correct, local incorrect.
+      std::vector<std::unique_ptr<PasswordFormData>> data;
+      int date_index = 0;
+      data.push_back(entry_present[0]
+                         ? base::MakeUnique<PasswordFormData>(
+                               android_correct(dates[date_index++]))
+                         : nullptr);
+      data.push_back(entry_present[1]
+                         ? base::MakeUnique<PasswordFormData>(
+                               android_incorrect(dates[date_index++]))
+                         : nullptr);
+      data.push_back(entry_present[2]
+                         ? base::MakeUnique<PasswordFormData>(
+                               android_correct2(dates[date_index++]))
+                         : nullptr);
+      data.push_back(entry_present[3]
+                         ? base::MakeUnique<PasswordFormData>(
+                               android_incorrect2(dates[date_index++]))
+                         : nullptr);
+
+      SCOPED_TRACE(val);
+      SCOPED_TRACE(j);
+      SCOPED_TRACE(FormDataMessage("data[0]=", data[0].get()));
+      SCOPED_TRACE(FormDataMessage("data[1]=", data[1].get()));
+      SCOPED_TRACE(FormDataMessage("data[2]=", data[2].get()));
+      SCOPED_TRACE(FormDataMessage("data[3]=", data[3].get()));
+
+      const PasswordFormData* latest_data =
+          std::find_if(data.begin(), data.end(),
+                       [latest](const std::unique_ptr<PasswordFormData>& data) {
+                         return data && data->creation_time == latest;
+                       })
+              ->get();
+      ASSERT_TRUE(latest_data);
+      std::vector<std::pair<SyncChange::SyncChangeType, autofill::PasswordForm>>
+          expected_sync_updates;
+      for (int i = 0; i < 2; ++i) {
+        if (latest_data != data[i].get()) {
+          expected_sync_updates.push_back(std::make_pair(
+              data[i] ? SyncChange::ACTION_UPDATE : SyncChange::ACTION_ADD,
+              i == 0 ? FormWithCorrectTag(*latest_data)
+                     : FormWithAndroidAutofillTag(*latest_data)));
+        }
+      }
+
+      std::vector<autofill::PasswordForm> stored_forms;
+      for (int i = 2; i < 4; ++i) {
+        if (data[i])
+          stored_forms.push_back(
+              *CreatePasswordFormFromDataForTesting(*data[i]));
+      }
+
+      SyncDataList sync_list;
+      for (int i = 0; i < 2; ++i) {
+        if (data[i]) {
+          sync_list.push_back(SyncDataFromPassword(
+              *CreatePasswordFormFromDataForTesting(*data[i])));
+        }
+      }
+
+      for (bool swap_sync_list : {false, true}) {
+        auto wrapper = base::MakeUnique<PasswordSyncableServiceWrapper>();
+        auto processor =
+            base::MakeUnique<testing::StrictMock<MockSyncChangeProcessor>>();
+
+        EXPECT_CALL(*wrapper->password_store(), FillAutofillableLogins(_))
+            .WillOnce(AppendForms(stored_forms));
+        EXPECT_CALL(*wrapper->password_store(), FillBlacklistLogins(_))
+            .WillOnce(Return(true));
+        for (int i = 2; i < 4; ++i) {
+          if (latest_data != data[i].get()) {
+            autofill::PasswordForm latest_form =
+                i == 2 ? FormWithCorrectTag(*latest_data)
+                       : FormWithAndroidAutofillTag(*latest_data);
+            if (data[i]) {
+              EXPECT_CALL(*wrapper->password_store(),
+                          UpdateLoginImpl(latest_form));
+            } else {
+              EXPECT_CALL(*wrapper->password_store(),
+                          AddLoginImpl(latest_form));
+            }
+          }
+        }
+
+        if (expected_sync_updates.size() == 0) {
+          EXPECT_CALL(*processor, ProcessSyncChanges(_, IsEmpty()));
+        } else if (expected_sync_updates.size() == 1) {
+          EXPECT_CALL(
+              *processor,
+              ProcessSyncChanges(_, ElementsAre(SyncChangeIs(
+                                        expected_sync_updates[0].first,
+                                        expected_sync_updates[0].second))));
+        } else if (expected_sync_updates.size() == 2) {
+          EXPECT_CALL(
+              *processor,
+              ProcessSyncChanges(
+                  _, UnorderedElementsAre(
+                         SyncChangeIs(expected_sync_updates[0].first,
+                                      expected_sync_updates[0].second),
+                         SyncChangeIs(expected_sync_updates[1].first,
+                                      expected_sync_updates[1].second))));
+        }
+
+        if (swap_sync_list && sync_list.size() == 2)
+          std::swap(sync_list[0], sync_list[1]);
+        wrapper->service()->MergeDataAndStartSyncing(
+            syncer::PASSWORDS, sync_list, std::move(processor),
+            std::unique_ptr<syncer::SyncErrorFactory>());
+        wrapper.reset();
+        // Wait til PasswordStore is destroy end therefore all the expectations
+        // on it are checked.
+        scoped_task_environment_.RunUntilIdle();
+      }
+    }
+  }
+}
+
+TEST_F(PasswordSyncableServiceAndroidAutofillTest, TwoWayServerAndLocalMerge) {
+  for (unsigned i = 0; i < 2 * 2; ++i) {
+    // Generate 4 different combinations for local/server entries.
+    std::vector<unsigned> combination = ExtractTimestamps(i, 2);
+    ASSERT_EQ(2u, combination.size());
+    const bool sync_data_correct = !!combination[0];
+    const bool local_data_correct = !!combination[1];
+
+    for (unsigned val = 0; val < 2 * 2; ++val) {
+      std::vector<unsigned> dates = ExtractTimestamps(i, 2);
+      ASSERT_EQ(2u, dates.size());
+
+      const PasswordFormData sync_data = sync_data_correct
+                                             ? android_correct(dates[0])
+                                             : android_incorrect(dates[0]);
+      const PasswordFormData local_data = local_data_correct
+                                              ? android_correct2(dates[1])
+                                              : android_incorrect2(dates[1]);
+
+      const PasswordFormData* latest_data =
+          dates[1] > dates[0] ? &local_data : &sync_data;
+
+      auto wrapper = base::MakeUnique<PasswordSyncableServiceWrapper>();
+      auto processor =
+          base::MakeUnique<testing::StrictMock<MockSyncChangeProcessor>>();
+
+      EXPECT_CALL(*wrapper->password_store(), FillAutofillableLogins(_))
+          .WillOnce(
+              AppendForm(*CreatePasswordFormFromDataForTesting(local_data)));
+      EXPECT_CALL(*wrapper->password_store(), FillBlacklistLogins(_))
+          .WillOnce(Return(true));
+      if (!local_data_correct || latest_data == &sync_data) {
+        if (local_data_correct) {
+          EXPECT_CALL(*wrapper->password_store(),
+                      UpdateLoginImpl(FormWithCorrectTag(*latest_data)));
+        } else {
+          EXPECT_CALL(*wrapper->password_store(),
+                      AddLoginImpl(FormWithCorrectTag(*latest_data)));
+        }
+      }
+      if (!local_data_correct && latest_data == &sync_data) {
+        EXPECT_CALL(*wrapper->password_store(),
+                    UpdateLoginImpl(FormWithAndroidAutofillTag(*latest_data)));
+      } else if (local_data_correct && !sync_data_correct) {
+        EXPECT_CALL(*wrapper->password_store(),
+                    AddLoginImpl(FormWithAndroidAutofillTag(*latest_data)));
+      }
+
+      std::vector<std::pair<SyncChange::SyncChangeType, autofill::PasswordForm>>
+          expected_sync_updates;
+      // Deal with the correct sync entry and incorrect one.
+      if (sync_data_correct) {
+        if (latest_data != &sync_data) {
+          expected_sync_updates.push_back(std::make_pair(
+              SyncChange::ACTION_UPDATE, FormWithCorrectTag(*latest_data)));
+        }
+        if (!local_data_correct) {
+          expected_sync_updates.push_back(
+              std::make_pair(SyncChange::ACTION_ADD,
+                             FormWithAndroidAutofillTag(*latest_data)));
+        }
+      } else {
+        expected_sync_updates.push_back(std::make_pair(
+            SyncChange::ACTION_ADD, FormWithCorrectTag(*latest_data)));
+        if (latest_data != &sync_data) {
+          expected_sync_updates.push_back(
+              std::make_pair(SyncChange::ACTION_UPDATE,
+                             FormWithAndroidAutofillTag(*latest_data)));
+        }
+      }
+
+      // Set expectation on |processor|.
+      if (expected_sync_updates.size() == 0) {
+        EXPECT_CALL(*processor, ProcessSyncChanges(_, IsEmpty()));
+      } else if (expected_sync_updates.size() == 1) {
+        EXPECT_CALL(
+            *processor,
+            ProcessSyncChanges(
+                _, ElementsAre(SyncChangeIs(expected_sync_updates[0].first,
+                                            expected_sync_updates[0].second))));
+      } else if (expected_sync_updates.size() == 2) {
+        EXPECT_CALL(*processor,
+                    ProcessSyncChanges(
+                        _, UnorderedElementsAre(
+                               SyncChangeIs(expected_sync_updates[0].first,
+                                            expected_sync_updates[0].second),
+                               SyncChangeIs(expected_sync_updates[1].first,
+                                            expected_sync_updates[1].second))));
+      }
+
+      SyncDataList sync_list = {SyncDataFromPassword(
+          *CreatePasswordFormFromDataForTesting(sync_data))};
+      wrapper->service()->MergeDataAndStartSyncing(
+          syncer::PASSWORDS, sync_list, std::move(processor),
+          std::unique_ptr<syncer::SyncErrorFactory>());
+      wrapper.reset();
+      // Wait til PasswordStore is destroy end therefore all the expectations on
+      // it are checked.
+      scoped_task_environment_.RunUntilIdle();
+    }
+  }
+}
+
+TEST_F(PasswordSyncableServiceAndroidAutofillTest, OneEntryOnly) {
+  for (int i = 0; i < 3; ++i) {
+    // The case when only local incorrect entry exists is excluded. It's very
+    // exotic because a local incorrect entry can come only from the server.
+    // In such a case a copy will be uploaded to the server and next
+    // MergeDataAndStartSyncing will do a proper migration.
+    SCOPED_TRACE(i);
+    // Whether the entry exists: Sync correct, Sync Android autofill,
+    // local correct, local incorrect.
+    const bool entry_is_correct = i == 0 || i == 2;
+    const bool entry_is_local = i >= 2;
+    PasswordFormData data =
+        entry_is_correct ? android_correct(100) : android_incorrect(100);
+
+    auto wrapper = base::MakeUnique<PasswordSyncableServiceWrapper>();
+    auto processor =
+        base::MakeUnique<testing::StrictMock<MockSyncChangeProcessor>>();
+
+    if (entry_is_local) {
+      EXPECT_CALL(*wrapper->password_store(), FillAutofillableLogins(_))
+          .WillOnce(AppendForm(*CreatePasswordFormFromDataForTesting(data)));
+    } else {
+      EXPECT_CALL(*wrapper->password_store(), FillAutofillableLogins(_))
+          .WillOnce(Return(true));
+    }
+    EXPECT_CALL(*wrapper->password_store(), FillBlacklistLogins(_))
+        .WillOnce(Return(true));
+    if (!entry_is_local && !entry_is_correct) {
+      EXPECT_CALL(*wrapper->password_store(),
+                  AddLoginImpl(FormWithAndroidAutofillTag(data)));
+    }
+    if (!entry_is_local) {
+      EXPECT_CALL(*wrapper->password_store(),
+                  AddLoginImpl(FormWithCorrectTag(data)));
+    }
+
+    if (entry_is_correct && !entry_is_local) {
+      EXPECT_CALL(*processor, ProcessSyncChanges(_, IsEmpty()));
+    } else {
+      EXPECT_CALL(*processor,
+                  ProcessSyncChanges(
+                      _, ElementsAre(SyncChangeIs(SyncChange::ACTION_ADD,
+                                                  FormWithCorrectTag(data)))));
+    }
+
+    SyncDataList sync_list;
+    if (!entry_is_local) {
+      sync_list.push_back(
+          SyncDataFromPassword(*CreatePasswordFormFromDataForTesting(data)));
+    }
+    wrapper->service()->MergeDataAndStartSyncing(
+        syncer::PASSWORDS, sync_list, std::move(processor),
+        std::unique_ptr<syncer::SyncErrorFactory>());
+    wrapper.reset();
+    // Wait til PasswordStore is destroy end therefore all the expectations on
+    // it are checked.
+    scoped_task_environment_.RunUntilIdle();
+  }
+}
+
+TEST_F(PasswordSyncableServiceAndroidAutofillTest, FourEqualEntries) {
+  // Sync correct, Sync Android autofill, local correct, local incorrect with
+  // the same content. Nothing should happen.
+  const PasswordFormData data = android_correct(100);
+  autofill::PasswordForm local_correct = FormWithCorrectTag(data);
+  autofill::PasswordForm local_incorrect = FormWithAndroidAutofillTag(data);
+  syncer::SyncData sync_correct = SyncDataFromPassword(local_correct);
+  syncer::SyncData sync_incorrect = SyncDataFromPassword(local_incorrect);
+
+  for (bool correct_sync_first : {true, false}) {
+    auto wrapper = base::MakeUnique<PasswordSyncableServiceWrapper>();
+    auto processor =
+        base::MakeUnique<testing::StrictMock<MockSyncChangeProcessor>>();
+
+    std::vector<autofill::PasswordForm> stored_forms = {local_correct,
+                                                        local_incorrect};
+    EXPECT_CALL(*wrapper->password_store(), FillAutofillableLogins(_))
+        .WillOnce(AppendForms(stored_forms));
+    EXPECT_CALL(*wrapper->password_store(), FillBlacklistLogins(_))
+        .WillOnce(Return(true));
+    EXPECT_CALL(*processor, ProcessSyncChanges(_, IsEmpty()));
+
+    SyncDataList sync_list = {sync_correct, sync_incorrect};
+    if (!correct_sync_first)
+      std::swap(sync_list[0], sync_list[1]);
+    wrapper->service()->MergeDataAndStartSyncing(
+        syncer::PASSWORDS, sync_list, std::move(processor),
+        std::unique_ptr<syncer::SyncErrorFactory>());
+    wrapper.reset();
+    // Wait til PasswordStore is destroy end therefore all the expectations on
+    // it are checked.
+    scoped_task_environment_.RunUntilIdle();
+  }
+}
+
+TEST_F(PasswordSyncableServiceAndroidAutofillTest, AndroidCorrectEqualEntries) {
+  // Sync correct, local correct with the same content. Nothing should happen.
+  const PasswordFormData data = android_correct(100);
+  autofill::PasswordForm local_correct = FormWithCorrectTag(data);
+  syncer::SyncData sync_correct = SyncDataFromPassword(local_correct);
+
+  auto wrapper = base::MakeUnique<PasswordSyncableServiceWrapper>();
+  auto processor =
+      base::MakeUnique<testing::StrictMock<MockSyncChangeProcessor>>();
+
+  EXPECT_CALL(*wrapper->password_store(), FillAutofillableLogins(_))
+      .WillOnce(AppendForm(local_correct));
+  EXPECT_CALL(*wrapper->password_store(), FillBlacklistLogins(_))
+      .WillOnce(Return(true));
+  EXPECT_CALL(*processor, ProcessSyncChanges(_, IsEmpty()));
+
+  wrapper->service()->MergeDataAndStartSyncing(
+      syncer::PASSWORDS, {sync_correct}, std::move(processor),
+      std::unique_ptr<syncer::SyncErrorFactory>());
+  wrapper.reset();
+  // Wait til PasswordStore is destroy end therefore all the expectations on
+  // it are checked.
+  scoped_task_environment_.RunUntilIdle();
+}
+
 }  // namespace
 
 }  // namespace password_manager