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// Copyright (C) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "icing/store/dynamic-trie-key-mapper.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "icing/store/document-id.h"
#include "icing/testing/common-matchers.h"
#include "icing/testing/tmp-directory.h"
using ::testing::_;
using ::testing::HasSubstr;
using ::testing::IsEmpty;
using ::testing::Pair;
using ::testing::UnorderedElementsAre;
namespace icing {
namespace lib {
namespace {
constexpr int kMaxDynamicTrieKeyMapperSize = 3 * 1024 * 1024; // 3 MiB
class DynamicTrieKeyMapperTest : public testing::Test {
protected:
void SetUp() override { base_dir_ = GetTestTempDir() + "/key_mapper"; }
void TearDown() override {
filesystem_.DeleteDirectoryRecursively(base_dir_.c_str());
}
std::string base_dir_;
Filesystem filesystem_;
};
TEST_F(DynamicTrieKeyMapperTest, InvalidBaseDir) {
ASSERT_THAT(DynamicTrieKeyMapper<DocumentId>::Create(
filesystem_, "/dev/null", kMaxDynamicTrieKeyMapperSize)
.status()
.error_message(),
HasSubstr("Failed to create DynamicTrieKeyMapper"));
}
TEST_F(DynamicTrieKeyMapperTest, NegativeMaxKeyMapperSizeReturnsInternalError) {
ASSERT_THAT(
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_, -1),
StatusIs(libtextclassifier3::StatusCode::INTERNAL));
}
TEST_F(DynamicTrieKeyMapperTest, TooLargeMaxKeyMapperSizeReturnsInternalError) {
ASSERT_THAT(DynamicTrieKeyMapper<DocumentId>::Create(
filesystem_, base_dir_, std::numeric_limits<int>::max()),
StatusIs(libtextclassifier3::StatusCode::INTERNAL));
}
TEST_F(DynamicTrieKeyMapperTest, CreateNewKeyMapper) {
ICING_ASSERT_OK_AND_ASSIGN(
std::unique_ptr<DynamicTrieKeyMapper<DocumentId>> key_mapper,
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_,
kMaxDynamicTrieKeyMapperSize));
EXPECT_THAT(key_mapper->num_keys(), 0);
}
TEST_F(DynamicTrieKeyMapperTest, CanUpdateSameKeyMultipleTimes) {
ICING_ASSERT_OK_AND_ASSIGN(
std::unique_ptr<DynamicTrieKeyMapper<DocumentId>> key_mapper,
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_,
kMaxDynamicTrieKeyMapperSize));
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 100));
ICING_EXPECT_OK(key_mapper->Put("default-youtube.com", 50));
EXPECT_THAT(key_mapper->Get("default-google.com"), IsOkAndHolds(100));
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 200));
EXPECT_THAT(key_mapper->Get("default-google.com"), IsOkAndHolds(200));
EXPECT_THAT(key_mapper->num_keys(), 2);
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 300));
EXPECT_THAT(key_mapper->Get("default-google.com"), IsOkAndHolds(300));
EXPECT_THAT(key_mapper->num_keys(), 2);
}
TEST_F(DynamicTrieKeyMapperTest, GetOrPutOk) {
ICING_ASSERT_OK_AND_ASSIGN(
std::unique_ptr<DynamicTrieKeyMapper<DocumentId>> key_mapper,
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_,
kMaxDynamicTrieKeyMapperSize));
EXPECT_THAT(key_mapper->Get("foo"),
StatusIs(libtextclassifier3::StatusCode::NOT_FOUND));
EXPECT_THAT(key_mapper->GetOrPut("foo", 1), IsOkAndHolds(1));
EXPECT_THAT(key_mapper->Get("foo"), IsOkAndHolds(1));
}
TEST_F(DynamicTrieKeyMapperTest, CanPersistToDiskRegularly) {
ICING_ASSERT_OK_AND_ASSIGN(
std::unique_ptr<DynamicTrieKeyMapper<DocumentId>> key_mapper,
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_,
kMaxDynamicTrieKeyMapperSize));
// Can persist an empty DynamicTrieKeyMapper.
ICING_EXPECT_OK(key_mapper->PersistToDisk());
EXPECT_THAT(key_mapper->num_keys(), 0);
// Can persist the smallest DynamicTrieKeyMapper.
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 100));
ICING_EXPECT_OK(key_mapper->PersistToDisk());
EXPECT_THAT(key_mapper->num_keys(), 1);
EXPECT_THAT(key_mapper->Get("default-google.com"), IsOkAndHolds(100));
// Can continue to add keys after PersistToDisk().
ICING_EXPECT_OK(key_mapper->Put("default-youtube.com", 200));
EXPECT_THAT(key_mapper->num_keys(), 2);
EXPECT_THAT(key_mapper->Get("default-youtube.com"), IsOkAndHolds(200));
// Can continue to update the same key after PersistToDisk().
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 300));
EXPECT_THAT(key_mapper->Get("default-google.com"), IsOkAndHolds(300));
EXPECT_THAT(key_mapper->num_keys(), 2);
}
TEST_F(DynamicTrieKeyMapperTest, CanUseAcrossMultipleInstances) {
ICING_ASSERT_OK_AND_ASSIGN(
std::unique_ptr<DynamicTrieKeyMapper<DocumentId>> key_mapper,
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_,
kMaxDynamicTrieKeyMapperSize));
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 100));
ICING_EXPECT_OK(key_mapper->PersistToDisk());
key_mapper.reset();
ICING_ASSERT_OK_AND_ASSIGN(
key_mapper, DynamicTrieKeyMapper<DocumentId>::Create(
filesystem_, base_dir_, kMaxDynamicTrieKeyMapperSize));
EXPECT_THAT(key_mapper->num_keys(), 1);
EXPECT_THAT(key_mapper->Get("default-google.com"), IsOkAndHolds(100));
// Can continue to read/write to the KeyMapper.
ICING_EXPECT_OK(key_mapper->Put("default-youtube.com", 200));
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 300));
EXPECT_THAT(key_mapper->num_keys(), 2);
EXPECT_THAT(key_mapper->Get("default-youtube.com"), IsOkAndHolds(200));
EXPECT_THAT(key_mapper->Get("default-google.com"), IsOkAndHolds(300));
}
TEST_F(DynamicTrieKeyMapperTest, CanDeleteAndRestartKeyMapping) {
// Can delete even if there's nothing there
ICING_EXPECT_OK(
DynamicTrieKeyMapper<DocumentId>::Delete(filesystem_, base_dir_));
ICING_ASSERT_OK_AND_ASSIGN(
std::unique_ptr<DynamicTrieKeyMapper<DocumentId>> key_mapper,
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_,
kMaxDynamicTrieKeyMapperSize));
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 100));
ICING_EXPECT_OK(key_mapper->PersistToDisk());
ICING_EXPECT_OK(
DynamicTrieKeyMapper<DocumentId>::Delete(filesystem_, base_dir_));
key_mapper.reset();
ICING_ASSERT_OK_AND_ASSIGN(
key_mapper, DynamicTrieKeyMapper<DocumentId>::Create(
filesystem_, base_dir_, kMaxDynamicTrieKeyMapperSize));
EXPECT_THAT(key_mapper->num_keys(), 0);
ICING_EXPECT_OK(key_mapper->Put("default-google.com", 100));
EXPECT_THAT(key_mapper->num_keys(), 1);
}
TEST_F(DynamicTrieKeyMapperTest, GetValuesToKeys) {
ICING_ASSERT_OK_AND_ASSIGN(
std::unique_ptr<DynamicTrieKeyMapper<DocumentId>> key_mapper,
DynamicTrieKeyMapper<DocumentId>::Create(filesystem_, base_dir_,
kMaxDynamicTrieKeyMapperSize));
EXPECT_THAT(key_mapper->GetValuesToKeys(), IsEmpty());
ICING_EXPECT_OK(key_mapper->Put("foo", /*value=*/1));
ICING_EXPECT_OK(key_mapper->Put("bar", /*value=*/2));
EXPECT_THAT(key_mapper->GetValuesToKeys(),
UnorderedElementsAre(Pair(1, "foo"), Pair(2, "bar")));
ICING_EXPECT_OK(key_mapper->Put("baz", /*value=*/3));
EXPECT_THAT(
key_mapper->GetValuesToKeys(),
UnorderedElementsAre(Pair(1, "foo"), Pair(2, "bar"), Pair(3, "baz")));
}
} // namespace
} // namespace lib
} // namespace icing
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