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// Copyright 2017 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/metrics/persistent_system_profile.h"
#include <memory>
#include "base/check_op.h"
#include "base/metrics/persistent_memory_allocator.h"
#include "base/rand_util.h"
#include "components/variations/hashing.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace metrics {
class PersistentSystemProfileTest : public testing::Test {
public:
const int32_t kAllocatorMemorySize = 1 << 20; // 1 MiB
PersistentSystemProfileTest() {}
PersistentSystemProfileTest(const PersistentSystemProfileTest&) = delete;
PersistentSystemProfileTest& operator=(const PersistentSystemProfileTest&) =
delete;
~PersistentSystemProfileTest() override {}
void SetUp() override {
memory_allocator_ = std::make_unique<base::LocalPersistentMemoryAllocator>(
kAllocatorMemorySize, 0, "");
records_ = std::make_unique<PersistentSystemProfile::RecordAllocator>(
memory_allocator_.get());
persistent_profile_.RegisterPersistentAllocator(memory_allocator_.get());
}
void TearDown() override {
persistent_profile_.DeregisterPersistentAllocator(memory_allocator_.get());
records_.reset();
memory_allocator_.reset();
}
void WriteRecord(uint8_t type, const std::string& record) {
persistent_profile_.allocators_[0].Write(
static_cast<PersistentSystemProfile::RecordType>(type), record);
}
bool ReadRecord(uint8_t* type, std::string* record) {
PersistentSystemProfile::RecordType rec_type;
bool success = records_->Read(&rec_type, record);
*type = rec_type; // Convert to uint8_t for testing.
return success;
}
base::PersistentMemoryAllocator* memory_allocator() {
return memory_allocator_.get();
}
PersistentSystemProfile* persistent_profile() { return &persistent_profile_; }
private:
PersistentSystemProfile persistent_profile_;
std::unique_ptr<base::PersistentMemoryAllocator> memory_allocator_;
std::unique_ptr<PersistentSystemProfile::RecordAllocator> records_;
};
TEST_F(PersistentSystemProfileTest, Create) {
uint32_t type;
base::PersistentMemoryAllocator::Iterator iter(memory_allocator());
base::PersistentMemoryAllocator::Reference ref = iter.GetNext(&type);
DCHECK(ref);
DCHECK_NE(0U, type);
}
TEST_F(PersistentSystemProfileTest, RecordSplitting) {
const size_t kRecordSize = 100 << 10; // 100 KiB
std::vector<char> buffer;
buffer.resize(kRecordSize);
base::RandBytes(&buffer[0], kRecordSize);
WriteRecord(42, std::string(&buffer[0], kRecordSize));
uint8_t type;
std::string record;
ASSERT_TRUE(ReadRecord(&type, &record));
EXPECT_EQ(42U, type);
ASSERT_EQ(kRecordSize, record.size());
for (size_t i = 0; i < kRecordSize; ++i)
EXPECT_EQ(buffer[i], record[i]);
}
TEST_F(PersistentSystemProfileTest, ProfileStorage) {
SystemProfileProto proto1;
SystemProfileProto::FieldTrial* trial = proto1.add_field_trial();
trial->set_name_id(123);
trial->set_group_id(456);
persistent_profile()->SetSystemProfile(proto1, false);
SystemProfileProto proto2;
ASSERT_TRUE(PersistentSystemProfile::HasSystemProfile(*memory_allocator()));
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &proto2));
ASSERT_EQ(1, proto2.field_trial_size());
EXPECT_EQ(123U, proto2.field_trial(0).name_id());
EXPECT_EQ(456U, proto2.field_trial(0).group_id());
// Check that the profile can be overwritten by another incomplete profile.
trial = proto1.add_field_trial();
trial->set_name_id(34);
trial->set_group_id(50);
persistent_profile()->SetSystemProfile(proto1, false);
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &proto2));
ASSERT_EQ(2, proto2.field_trial_size());
EXPECT_EQ(123U, proto2.field_trial(0).name_id());
EXPECT_EQ(456U, proto2.field_trial(0).group_id());
EXPECT_EQ(34U, proto2.field_trial(1).name_id());
EXPECT_EQ(50U, proto2.field_trial(1).group_id());
// Check that the profile can be overwritten by a complete profile.
trial = proto1.add_field_trial();
trial->set_name_id(78);
trial->set_group_id(90);
persistent_profile()->SetSystemProfile(proto1, true);
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &proto2));
ASSERT_EQ(3, proto2.field_trial_size());
EXPECT_EQ(123U, proto2.field_trial(0).name_id());
EXPECT_EQ(456U, proto2.field_trial(0).group_id());
EXPECT_EQ(34U, proto2.field_trial(1).name_id());
EXPECT_EQ(50U, proto2.field_trial(1).group_id());
EXPECT_EQ(78U, proto2.field_trial(2).name_id());
EXPECT_EQ(90U, proto2.field_trial(2).group_id());
// Check that the profile won't be overwritten by a new non-complete profile.
trial = proto1.add_field_trial();
trial->set_name_id(0xC0DE);
trial->set_group_id(0xFEED);
persistent_profile()->SetSystemProfile(proto1, false);
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &proto2));
ASSERT_EQ(3, proto2.field_trial_size());
EXPECT_EQ(123U, proto2.field_trial(0).name_id());
EXPECT_EQ(456U, proto2.field_trial(0).group_id());
EXPECT_EQ(34U, proto2.field_trial(1).name_id());
EXPECT_EQ(50U, proto2.field_trial(1).group_id());
EXPECT_EQ(78U, proto2.field_trial(2).name_id());
EXPECT_EQ(90U, proto2.field_trial(2).group_id());
}
TEST_F(PersistentSystemProfileTest, ProfileExtensions) {
persistent_profile()->AddFieldTrial("sna", "foo");
SystemProfileProto fetched;
ASSERT_FALSE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &fetched));
SystemProfileProto proto;
SystemProfileProto::FieldTrial* trial = proto.add_field_trial();
trial->set_name_id(123);
trial->set_group_id(456);
// The system profile should now start fresh. In practice, field trials should
// already be properly updated in subsequent system profiles.
persistent_profile()->SetSystemProfile(proto, false);
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &fetched));
ASSERT_EQ(1, fetched.field_trial_size());
EXPECT_EQ(123U, fetched.field_trial(0).name_id());
EXPECT_EQ(456U, fetched.field_trial(0).group_id());
persistent_profile()->AddFieldTrial("foo", "bar");
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &fetched));
ASSERT_EQ(2, fetched.field_trial_size());
EXPECT_EQ(123U, fetched.field_trial(0).name_id());
EXPECT_EQ(456U, fetched.field_trial(0).group_id());
EXPECT_EQ(variations::HashName("foo"), fetched.field_trial(1).name_id());
EXPECT_EQ(variations::HashName("bar"), fetched.field_trial(1).group_id());
}
TEST_F(PersistentSystemProfileTest, OverwriteFieldTrialsInProfile) {
// Set system profile with the field trial.
SystemProfileProto proto;
SystemProfileProto::FieldTrial* trial = proto.add_field_trial();
trial->set_name_id(variations::HashName("foo"));
trial->set_group_id(456);
persistent_profile()->SetSystemProfile(proto, false);
// Overwrite the same trial with different group.
persistent_profile()->AddFieldTrial("foo", "bar");
// The fetched profile should have the latest group name,
SystemProfileProto fetched;
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &fetched));
ASSERT_EQ(1, fetched.field_trial_size());
EXPECT_EQ(variations::HashName("foo"), fetched.field_trial(0).name_id());
EXPECT_EQ(variations::HashName("bar"), fetched.field_trial(0).group_id());
}
TEST_F(PersistentSystemProfileTest, OverwriteFieldTrials) {
// Set up a non-empty system profile.
SystemProfileProto proto;
proto.set_client_uuid("id");
persistent_profile()->SetSystemProfile(proto, false);
// Set and overwrite the same trial with different group.
persistent_profile()->AddFieldTrial("foo", "bar");
persistent_profile()->AddFieldTrial("foo", "bar2");
// The fetched profile should have the latest group name,
SystemProfileProto fetched;
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &fetched));
ASSERT_EQ(1, fetched.field_trial_size());
EXPECT_EQ(variations::HashName("foo"), fetched.field_trial(0).name_id());
EXPECT_EQ(variations::HashName("bar2"), fetched.field_trial(0).group_id());
}
TEST_F(PersistentSystemProfileTest, DeleteFieldTrials) {
// Set up a non-empty system profile.
SystemProfileProto proto;
proto.set_client_uuid("id");
persistent_profile()->SetSystemProfile(proto, false);
// Set and delete the trial.
persistent_profile()->AddFieldTrial("foo", "bar");
persistent_profile()->RemoveFieldTrial("foo");
// The fetched profile should not have the deleted trial.
SystemProfileProto fetched;
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &fetched));
ASSERT_EQ(0, fetched.field_trial_size());
// Reset the trial and the fetched profile should have the latest group name.
persistent_profile()->AddFieldTrial("foo", "bar2");
ASSERT_TRUE(
PersistentSystemProfile::GetSystemProfile(*memory_allocator(), &fetched));
ASSERT_EQ(1, fetched.field_trial_size());
EXPECT_EQ(variations::HashName("foo"), fetched.field_trial(0).name_id());
EXPECT_EQ(variations::HashName("bar2"), fetched.field_trial(0).group_id());
}
} // namespace metrics
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