sync/test/test_transaction_observer.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SYNC_TEST_TEST_TRANSACTION_OBSERVER_H_
   6 #define SYNC_TEST_TEST_TRANSACTION_OBSERVER_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "sync/internal_api/public/base/model_type.h"
  10 #include "sync/syncable/transaction_observer.h"
  11 #include "sync/syncable/write_transaction_info.h"
  12
  13 namespace syncer {
  14 namespace syncable {
  15
  16 // This class acts as a TransactionObserver for the syncable::Directory.
  17 // It gathers information that is useful for writing test assertions.
  18 class TestTransactionObserver :
  19   public base::SupportsWeakPtr<TestTransactionObserver>,
  20   public TransactionObserver {
  21  public:
  22   TestTransactionObserver();
  23   ~TestTransactionObserver() override;
  24   void OnTransactionWrite(
  25       const ImmutableWriteTransactionInfo& write_transaction_info,
  26       ModelTypeSet models_with_changes) override;
  27
  28   // Returns the number of transactions observed.
  29   //
  30   // Transactions are generated only when meaningful changes are made.  For most
  31   // testing purposes, you may assume that this counts the number of syncer
  32   // nudges generated.
  33   int transactions_observed();
  34
  35  private:
  36   DISALLOW_COPY_AND_ASSIGN(TestTransactionObserver);
  37
  38   int transactions_observed_;
  39 };
  40
  41 }  // namespace syncable
  42 }  // namespace syncer
  43
  44
  45 #endif  // SYNC_TEST_TEST_TRANSACTION_OBSERVER_H_