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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/performance_manager/public/voting/voting.h"
#include "base/test/gtest_util.h"
#include "components/performance_manager/test_support/voting.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace performance_manager {
namespace {
using ::testing::AssertionFailure;
using ::testing::AssertionResult;
using ::testing::AssertionSuccess;
using TestVote = voting::Vote<void, int, 0>;
using TestVotingChannel = voting::VotingChannel<TestVote>;
using TestVotingChannelFactory = voting::VotingChannelFactory<TestVote>;
using DummyVoteObserver = voting::test::DummyVoteObserver<TestVote>;
// Some dummy contexts.
const void* kDummyContext1 = reinterpret_cast<const void*>(0xDEADBEEF);
const void* kDummyContext2 = reinterpret_cast<const void*>(0xBAADF00D);
static const char kReason[] = "reason";
} // namespace
TEST(VotingTest, SimpleVoter) {
DummyVoteObserver observer;
TestVotingChannel voting_channel = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id = voting_channel.voter_id();
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
voting_channel.SubmitVote(kDummyContext1, TestVote(5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 5, kReason));
voting_channel.ChangeVote(kDummyContext1, TestVote(10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 10, kReason));
voting_channel.InvalidateVote(kDummyContext1);
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
}
// Tests that an observer can receive votes for different contexts from the same
// voting channel.
TEST(VotingTest, OneVoterMultipleContexts) {
DummyVoteObserver observer;
TestVotingChannel voting_channel = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id = voting_channel.voter_id();
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
voting_channel.SubmitVote(kDummyContext1, TestVote(5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 5, kReason));
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext2));
voting_channel.SubmitVote(kDummyContext2, TestVote(100, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext2, 100, kReason));
voting_channel.ChangeVote(kDummyContext1, TestVote(10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext2, 100, kReason));
voting_channel.InvalidateVote(kDummyContext1);
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext2, 100, kReason));
voting_channel.InvalidateVote(kDummyContext2);
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext2));
}
// Tests that an observer can receive votes from more than one voting channel.
TEST(VotingTest, TwoVoter) {
DummyVoteObserver observer;
TestVotingChannel voting_channel_1 = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id_1 = voting_channel_1.voter_id();
TestVotingChannel voting_channel_2 = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id_2 = voting_channel_2.voter_id();
EXPECT_FALSE(observer.HasVote(voter_id_1, kDummyContext1));
EXPECT_FALSE(observer.HasVote(voter_id_2, kDummyContext1));
voting_channel_1.SubmitVote(kDummyContext1, TestVote(5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id_1, kDummyContext1, 5, kReason));
EXPECT_FALSE(observer.HasVote(voter_id_2, kDummyContext1));
voting_channel_2.SubmitVote(kDummyContext1, TestVote(5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id_1, kDummyContext1, 5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id_2, kDummyContext1, 5, kReason));
voting_channel_1.ChangeVote(kDummyContext1, TestVote(10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id_1, kDummyContext1, 10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id_2, kDummyContext1, 5, kReason));
voting_channel_2.ChangeVote(kDummyContext1, TestVote(10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id_1, kDummyContext1, 10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id_2, kDummyContext1, 10, kReason));
voting_channel_1.InvalidateVote(kDummyContext1);
EXPECT_FALSE(observer.HasVote(voter_id_1, kDummyContext1));
EXPECT_TRUE(observer.HasVote(voter_id_2, kDummyContext1, 10, kReason));
voting_channel_2.InvalidateVote(kDummyContext1);
EXPECT_FALSE(observer.HasVote(voter_id_1, kDummyContext1));
EXPECT_FALSE(observer.HasVote(voter_id_2, kDummyContext1));
}
TEST(VotingTest, ResetVotingChannel) {
DummyVoteObserver observer;
TestVotingChannel voting_channel = observer.BuildVotingChannel();
EXPECT_TRUE(voting_channel.IsValid());
voting_channel.Reset();
EXPECT_FALSE(voting_channel.IsValid());
}
// Tests that VotingChannel supports move sementics.
TEST(VotingTest, MoveVotingChannel) {
DummyVoteObserver observer;
// Build the voting channel.
TestVotingChannel voting_channel_1 = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id = voting_channel_1.voter_id();
EXPECT_TRUE(voting_channel_1.IsValid());
// Cast a vote with that voting channel.
voting_channel_1.SubmitVote(kDummyContext1, TestVote(5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 5, kReason));
// Move the voting channel.
TestVotingChannel voting_channel_2 = std::move(voting_channel_1);
EXPECT_TRUE(voting_channel_2.IsValid());
// Use the second variable to change the vote.
voting_channel_2.ChangeVote(kDummyContext1, TestVote(10, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 10, kReason));
// Move the voting channel back using the move assignment operator.
voting_channel_1 = std::move(voting_channel_2);
EXPECT_TRUE(voting_channel_1.IsValid());
// Invalidate the vote.
voting_channel_1.InvalidateVote(kDummyContext1);
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
}
// Tests that submitting 2 votes for the same context using a VotingChannel
// results in a DCHECK.
TEST(VotingTest, SubmitDuplicateVote) {
DummyVoteObserver observer;
TestVotingChannel voting_channel = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id = voting_channel.voter_id();
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
voting_channel.SubmitVote(kDummyContext1, TestVote(5, kReason));
EXPECT_TRUE(observer.HasVote(voter_id, kDummyContext1, 5, kReason));
EXPECT_DCHECK_DEATH(
voting_channel.SubmitVote(kDummyContext1, TestVote(10, kReason)));
// Clean up.
voting_channel.InvalidateVote(kDummyContext1);
}
// Tests that calling ChangeVote() for a context before a vote was submitted for
// that context results in a DCHECK.
TEST(VotingTest, ChangeNonExisting) {
DummyVoteObserver observer;
TestVotingChannel voting_channel = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id = voting_channel.voter_id();
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
// TODO(pbos): This is a DCHECK-build-only CHECK, see voting.h. This should
// probably be either a DCHECK or a CHECK outside DCHECK builds.
if (DCHECK_IS_ON()) {
EXPECT_CHECK_DEATH(
voting_channel.ChangeVote(kDummyContext1, TestVote(5, kReason)));
}
}
// Tests that calling InvalidateVote() for a context before a vote was submitted
// for that context results in a DCHECK.
TEST(VotingTest, InvalidateNonExisting) {
DummyVoteObserver observer;
TestVotingChannel voting_channel = observer.BuildVotingChannel();
voting::VoterId<TestVote> voter_id = voting_channel.voter_id();
EXPECT_FALSE(observer.HasVote(voter_id, kDummyContext1));
EXPECT_DCHECK_DEATH(voting_channel.InvalidateVote(kDummyContext1));
}
// Tests that destroying a VotingChannelFactory before all of its VotingChannels
// results in a DCHECK.
TEST(VotingTest, DestroyFactoryBeforeChannel) {
TestVotingChannel voting_channel;
auto observer = std::make_unique<DummyVoteObserver>();
voting_channel = observer->BuildVotingChannel();
EXPECT_DCHECK_DEATH(observer.reset());
// Clean up.
voting_channel.Reset();
}
} // namespace performance_manager
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