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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PERFORMANCE_MANAGER_TEST_SUPPORT_VOTING_H_
#define COMPONENTS_PERFORMANCE_MANAGER_TEST_SUPPORT_VOTING_H_
#include "base/containers/contains.h"
#include "base/containers/flat_map.h"
#include "components/performance_manager/public/voting/voting.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace performance_manager {
namespace voting {
namespace test {
// A dummy observer that simply maintains a list of all submitted votes.
template <class VoteImpl>
class DummyVoteObserver : public VoteObserver<VoteImpl> {
public:
using ContextType = typename VoteImpl::ContextType;
DummyVoteObserver();
~DummyVoteObserver() override;
VotingChannel<VoteImpl> BuildVotingChannel();
size_t GetVoteCount() const;
size_t GetVoteCountForContext(
const typename VoteImpl::ContextType* context) const;
size_t GetVoteCountForVoterId(voting::VoterId<VoteImpl> voter_id) const;
bool HasVote(voting::VoterId<VoteImpl> voter_id,
const typename VoteImpl::ContextType* context) const;
bool HasVote(voting::VoterId<VoteImpl> voter_id,
const typename VoteImpl::ContextType* context,
const VoteImpl& vote) const;
bool HasVote(voting::VoterId<VoteImpl> voter_id,
const typename VoteImpl::ContextType* context,
typename VoteImpl::VoteType vote_value,
const char* reason = nullptr) const;
protected:
// VoteObserver:
void OnVoteSubmitted(voting::VoterId<VoteImpl> voter_id,
const ContextType* context,
const VoteImpl& vote) override;
void OnVoteChanged(voting::VoterId<VoteImpl> voter_id,
const ContextType* context,
const VoteImpl& new_vote) override;
void OnVoteInvalidated(voting::VoterId<VoteImpl> voter_id,
const ContextType* context) override;
private:
VotingChannelFactory<VoteImpl> voting_channel_factory_{this};
base::flat_map<voting::VoterId<VoteImpl>,
base::flat_map<const ContextType*, VoteImpl>>
votes_by_voter_id_;
};
template <class VoteImpl>
DummyVoteObserver<VoteImpl>::DummyVoteObserver() = default;
template <class VoteImpl>
DummyVoteObserver<VoteImpl>::~DummyVoteObserver() = default;
template <class VoteImpl>
VotingChannel<VoteImpl> DummyVoteObserver<VoteImpl>::BuildVotingChannel() {
return voting_channel_factory_.BuildVotingChannel();
}
template <class VoteImpl>
size_t DummyVoteObserver<VoteImpl>::GetVoteCount() const {
size_t vote_count = 0;
for (const auto& votes : votes_by_voter_id_) {
vote_count += votes.second.size();
}
return vote_count;
}
template <class VoteImpl>
size_t DummyVoteObserver<VoteImpl>::GetVoteCountForVoterId(
voting::VoterId<VoteImpl> voter_id) const {
auto it = votes_by_voter_id_.find(voter_id);
if (it == votes_by_voter_id_.end())
return 0;
return it->second.size();
}
template <class VoteImpl>
size_t DummyVoteObserver<VoteImpl>::GetVoteCountForContext(
const typename VoteImpl::ContextType* context) const {
size_t vote_count = 0;
for (const auto& votes : votes_by_voter_id_) {
vote_count += votes.second.count(context);
}
return vote_count;
}
template <class VoteImpl>
bool DummyVoteObserver<VoteImpl>::HasVote(
voting::VoterId<VoteImpl> voter_id,
const typename VoteImpl::ContextType* context) const {
auto votes_it = votes_by_voter_id_.find(voter_id);
if (votes_it == votes_by_voter_id_.end())
return false;
const auto& votes = votes_it->second;
return base::Contains(votes, context);
}
template <class VoteImpl>
bool DummyVoteObserver<VoteImpl>::HasVote(
voting::VoterId<VoteImpl> voter_id,
const typename VoteImpl::ContextType* context,
const VoteImpl& vote) const {
auto votes_it = votes_by_voter_id_.find(voter_id);
if (votes_it == votes_by_voter_id_.end())
return false;
const auto& votes = votes_it->second;
auto vote_it = votes.find(context);
if (vote_it == votes.end())
return false;
return vote_it->second == vote;
}
template <class VoteImpl>
bool DummyVoteObserver<VoteImpl>::HasVote(
voting::VoterId<VoteImpl> voter_id,
const typename VoteImpl::ContextType* context,
typename VoteImpl::VoteType vote_value,
const char* reason) const {
return HasVote(voter_id, context, VoteImpl(vote_value, reason));
}
template <class VoteImpl>
void DummyVoteObserver<VoteImpl>::OnVoteSubmitted(VoterId<VoteImpl> voter_id,
const ContextType* context,
const VoteImpl& vote) {
bool inserted = votes_by_voter_id_[voter_id].emplace(context, vote).second;
DCHECK(inserted);
}
template <class VoteImpl>
void DummyVoteObserver<VoteImpl>::OnVoteChanged(VoterId<VoteImpl> voter_id,
const ContextType* context,
const VoteImpl& new_vote) {
auto it = votes_by_voter_id_[voter_id].find(context);
CHECK(it != votes_by_voter_id_[voter_id].end());
it->second = new_vote;
}
template <class VoteImpl>
void DummyVoteObserver<VoteImpl>::OnVoteInvalidated(
VoterId<VoteImpl> voter_id,
const ContextType* context) {
auto it = votes_by_voter_id_.find(voter_id);
CHECK(it != votes_by_voter_id_.end());
base::flat_map<const ContextType*, VoteImpl>& votes = it->second;
size_t removed = votes.erase(context);
DCHECK_EQ(removed, 1u);
if (votes.empty())
votes_by_voter_id_.erase(it);
}
} // namespace test
} // namespace voting
} // namespace performance_manager
#endif // COMPONENTS_PERFORMANCE_MANAGER_TEST_SUPPORT_VOTING_H_
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