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rocksdb/env/env_basic_test.cc
mrambacher 281ac9c89e Add CreateFrom methods to Env/FileSystem (#8174) 
Summary:
- Added CreateFromString method to Env and FilesSystem to replace LoadEnv/Load.  This method/signature is a precursor to making these classes extend Customizable.

- Added CreateFromSystem to Env.  This method standardizes creating an Env from the environment variables.  Previously, some places would check TEST_ENV_URI and others would also check TEST_FS_URI.  Now the code is more command/standardized.

- Added CreateFromFlags to Env.  These method allows Env to be create from string options (such as GFLAGS options) in a more standard way.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8174

Reviewed By: zhichao-cao

Differential Revision: D28999603

Pulled By: mrambacher

fbshipit-source-id: 88e6911e7e91f908458a7fe10a20e93ecbc275fb
2021-06-15 03:43:48 -07:00

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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
//
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
#include <algorithm>
#include <memory>
#include <string>
#include <vector>
#include "env/mock_env.h"
#include "file/file_util.h"
#include "rocksdb/convenience.h"
#include "rocksdb/env.h"
#include "rocksdb/env_encryption.h"
#include "test_util/testharness.h"
namespace ROCKSDB_NAMESPACE {
class EnvBasicTestWithParam : public testing::Test,
public ::testing::WithParamInterface<Env*> {
public:
Env* env_;
const EnvOptions soptions_;
std::string test_dir_;
EnvBasicTestWithParam() : env_(GetParam()) {
test_dir_ = test::PerThreadDBPath(env_, "env_basic_test");
}
void SetUp() override { ASSERT_OK(env_->CreateDirIfMissing(test_dir_)); }
void TearDown() override { ASSERT_OK(DestroyDir(env_, test_dir_)); }
};
class EnvMoreTestWithParam : public EnvBasicTestWithParam {};
INSTANTIATE_TEST_CASE_P(EnvDefault, EnvBasicTestWithParam,
::testing::Values(Env::Default()));
INSTANTIATE_TEST_CASE_P(EnvDefault, EnvMoreTestWithParam,
::testing::Values(Env::Default()));
static std::unique_ptr<Env> mock_env(new MockEnv(Env::Default()));
INSTANTIATE_TEST_CASE_P(MockEnv, EnvBasicTestWithParam,
::testing::Values(mock_env.get()));
#ifndef ROCKSDB_LITE
static Env* NewTestEncryptedEnv(Env* base, const std::string& provider_id) {
std::shared_ptr<EncryptionProvider> provider;
EXPECT_OK(EncryptionProvider::CreateFromString(ConfigOptions(), provider_id,
&provider));
return NewEncryptedEnv(base, provider);
}
// next statements run env test against default encryption code.
static std::unique_ptr<Env> ctr_encrypt_env(NewTestEncryptedEnv(Env::Default(),
"test://CTR"));
INSTANTIATE_TEST_CASE_P(EncryptedEnv, EnvBasicTestWithParam,
::testing::Values(ctr_encrypt_env.get()));
INSTANTIATE_TEST_CASE_P(EncryptedEnv, EnvMoreTestWithParam,
::testing::Values(ctr_encrypt_env.get()));
#endif // ROCKSDB_LITE
#ifndef ROCKSDB_LITE
static std::unique_ptr<Env> mem_env(NewMemEnv(Env::Default()));
INSTANTIATE_TEST_CASE_P(MemEnv, EnvBasicTestWithParam,
::testing::Values(mem_env.get()));
namespace {
// Returns a vector of 0 or 1 Env*, depending whether an Env is registered for
// TEST_ENV_URI.
//
// The purpose of returning an empty vector (instead of nullptr) is that gtest
// ValuesIn() will skip running tests when given an empty collection.
std::vector<Env*> GetCustomEnvs() {
static bool init = false;
static std::vector<Env*> res;
if (!init) {
init = true;
const char* uri = getenv("TEST_ENV_URI");
if (uri != nullptr) {
static std::shared_ptr<Env> env_guard;
static Env* custom_env;
Status s =
Env::CreateFromUri(ConfigOptions(), uri, "", &custom_env, &env_guard);
if (s.ok()) {
res.emplace_back(custom_env);
}
}
uri = getenv("TEST_FS_URI");
if (uri != nullptr) {
static std::shared_ptr<Env> fs_env_guard;
static Env* fs_env;
Status s =
Env::CreateFromUri(ConfigOptions(), "", uri, &fs_env, &fs_env_guard);
if (s.ok()) {
res.emplace_back(fs_env);
}
}
}
return res;
}
} // anonymous namespace
INSTANTIATE_TEST_CASE_P(CustomEnv, EnvBasicTestWithParam,
::testing::ValuesIn(GetCustomEnvs()));
INSTANTIATE_TEST_CASE_P(CustomEnv, EnvMoreTestWithParam,
::testing::ValuesIn(GetCustomEnvs()));
#endif // ROCKSDB_LITE
TEST_P(EnvBasicTestWithParam, Basics) {
uint64_t file_size;
std::unique_ptr<WritableFile> writable_file;
std::vector<std::string> children;
// Check that the directory is empty.
ASSERT_EQ(Status::NotFound(), env_->FileExists(test_dir_ + "/non_existent"));
ASSERT_TRUE(!env_->GetFileSize(test_dir_ + "/non_existent", &file_size).ok());
ASSERT_OK(env_->GetChildren(test_dir_, &children));
ASSERT_EQ(0U, children.size());
// Create a file.
ASSERT_OK(env_->NewWritableFile(test_dir_ + "/f", &writable_file, soptions_));
ASSERT_OK(writable_file->Close());
writable_file.reset();
// Check that the file exists.
ASSERT_OK(env_->FileExists(test_dir_ + "/f"));
ASSERT_OK(env_->GetFileSize(test_dir_ + "/f", &file_size));
ASSERT_EQ(0U, file_size);
ASSERT_OK(env_->GetChildren(test_dir_, &children));
ASSERT_EQ(1U, children.size());
ASSERT_EQ("f", children[0]);
ASSERT_OK(env_->DeleteFile(test_dir_ + "/f"));
// Write to the file.
ASSERT_OK(
env_->NewWritableFile(test_dir_ + "/f1", &writable_file, soptions_));
ASSERT_OK(writable_file->Append("abc"));
ASSERT_OK(writable_file->Close());
writable_file.reset();
ASSERT_OK(
env_->NewWritableFile(test_dir_ + "/f2", &writable_file, soptions_));
ASSERT_OK(writable_file->Close());
writable_file.reset();
// Check for expected size.
ASSERT_OK(env_->GetFileSize(test_dir_ + "/f1", &file_size));
ASSERT_EQ(3U, file_size);
// Check that renaming works.
ASSERT_TRUE(
!env_->RenameFile(test_dir_ + "/non_existent", test_dir_ + "/g").ok());
ASSERT_OK(env_->RenameFile(test_dir_ + "/f1", test_dir_ + "/g"));
ASSERT_EQ(Status::NotFound(), env_->FileExists(test_dir_ + "/f1"));
ASSERT_OK(env_->FileExists(test_dir_ + "/g"));
ASSERT_OK(env_->GetFileSize(test_dir_ + "/g", &file_size));
ASSERT_EQ(3U, file_size);
// Check that renaming overwriting works
ASSERT_OK(env_->RenameFile(test_dir_ + "/f2", test_dir_ + "/g"));
ASSERT_OK(env_->GetFileSize(test_dir_ + "/g", &file_size));
ASSERT_EQ(0U, file_size);
// Check that opening non-existent file fails.
std::unique_ptr<SequentialFile> seq_file;
std::unique_ptr<RandomAccessFile> rand_file;
ASSERT_TRUE(!env_->NewSequentialFile(test_dir_ + "/non_existent", &seq_file,
soptions_)
.ok());
ASSERT_TRUE(!seq_file);
ASSERT_NOK(env_->NewRandomAccessFile(test_dir_ + "/non_existent", &rand_file,
soptions_));
ASSERT_TRUE(!rand_file);
// Check that deleting works.
ASSERT_NOK(env_->DeleteFile(test_dir_ + "/non_existent"));
ASSERT_OK(env_->DeleteFile(test_dir_ + "/g"));
ASSERT_EQ(Status::NotFound(), env_->FileExists(test_dir_ + "/g"));
ASSERT_OK(env_->GetChildren(test_dir_, &children));
ASSERT_EQ(0U, children.size());
Status s = env_->GetChildren(test_dir_ + "/non_existent", &children);
ASSERT_TRUE(s.IsNotFound());
}
TEST_P(EnvBasicTestWithParam, ReadWrite) {
std::unique_ptr<WritableFile> writable_file;
std::unique_ptr<SequentialFile> seq_file;
std::unique_ptr<RandomAccessFile> rand_file;
Slice result;
char scratch[100];
ASSERT_OK(env_->NewWritableFile(test_dir_ + "/f", &writable_file, soptions_));
ASSERT_OK(writable_file->Append("hello "));
ASSERT_OK(writable_file->Append("world"));
ASSERT_OK(writable_file->Close());
writable_file.reset();
// Read sequentially.
ASSERT_OK(env_->NewSequentialFile(test_dir_ + "/f", &seq_file, soptions_));
ASSERT_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
ASSERT_EQ(0, result.compare("hello"));
ASSERT_OK(seq_file->Skip(1));
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
ASSERT_EQ(0, result.compare("world"));
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
ASSERT_EQ(0U, result.size());
ASSERT_OK(seq_file->Skip(100)); // Try to skip past end of file.
ASSERT_OK(seq_file->Read(1000, &result, scratch));
ASSERT_EQ(0U, result.size());
// Random reads.
ASSERT_OK(env_->NewRandomAccessFile(test_dir_ + "/f", &rand_file, soptions_));
ASSERT_OK(rand_file->Read(6, 5, &result, scratch)); // Read "world".
ASSERT_EQ(0, result.compare("world"));
ASSERT_OK(rand_file->Read(0, 5, &result, scratch)); // Read "hello".
ASSERT_EQ(0, result.compare("hello"));
ASSERT_OK(rand_file->Read(10, 100, &result, scratch)); // Read "d".
ASSERT_EQ(0, result.compare("d"));
// Too high offset.
ASSERT_TRUE(rand_file->Read(1000, 5, &result, scratch).ok());
}
TEST_P(EnvBasicTestWithParam, Misc) {
std::unique_ptr<WritableFile> writable_file;
ASSERT_OK(env_->NewWritableFile(test_dir_ + "/b", &writable_file, soptions_));
// These are no-ops, but we test they return success.
ASSERT_OK(writable_file->Sync());
ASSERT_OK(writable_file->Flush());
ASSERT_OK(writable_file->Close());
writable_file.reset();
}
TEST_P(EnvBasicTestWithParam, LargeWrite) {
const size_t kWriteSize = 300 * 1024;
char* scratch = new char[kWriteSize * 2];
std::string write_data;
for (size_t i = 0; i < kWriteSize; ++i) {
write_data.append(1, static_cast<char>(i));
}
std::unique_ptr<WritableFile> writable_file;
ASSERT_OK(env_->NewWritableFile(test_dir_ + "/f", &writable_file, soptions_));
ASSERT_OK(writable_file->Append("foo"));
ASSERT_OK(writable_file->Append(write_data));
ASSERT_OK(writable_file->Close());
writable_file.reset();
std::unique_ptr<SequentialFile> seq_file;
Slice result;
ASSERT_OK(env_->NewSequentialFile(test_dir_ + "/f", &seq_file, soptions_));
ASSERT_OK(seq_file->Read(3, &result, scratch)); // Read "foo".
ASSERT_EQ(0, result.compare("foo"));
size_t read = 0;
std::string read_data;
while (read < kWriteSize) {
ASSERT_OK(seq_file->Read(kWriteSize - read, &result, scratch));
read_data.append(result.data(), result.size());
read += result.size();
}
ASSERT_TRUE(write_data == read_data);
delete [] scratch;
}
TEST_P(EnvMoreTestWithParam, GetModTime) {
ASSERT_OK(env_->CreateDirIfMissing(test_dir_ + "/dir1"));
uint64_t mtime1 = 0x0;
ASSERT_OK(env_->GetFileModificationTime(test_dir_ + "/dir1", &mtime1));
}
TEST_P(EnvMoreTestWithParam, MakeDir) {
ASSERT_OK(env_->CreateDir(test_dir_ + "/j"));
ASSERT_OK(env_->FileExists(test_dir_ + "/j"));
std::vector<std::string> children;
ASSERT_OK(env_->GetChildren(test_dir_, &children));
ASSERT_EQ(1U, children.size());
// fail because file already exists
ASSERT_TRUE(!env_->CreateDir(test_dir_ + "/j").ok());
ASSERT_OK(env_->CreateDirIfMissing(test_dir_ + "/j"));
ASSERT_OK(env_->DeleteDir(test_dir_ + "/j"));
ASSERT_EQ(Status::NotFound(), env_->FileExists(test_dir_ + "/j"));
}
TEST_P(EnvMoreTestWithParam, GetChildren) {
// empty folder returns empty vector
std::vector<std::string> children;
std::vector<Env::FileAttributes> childAttr;
ASSERT_OK(env_->CreateDirIfMissing(test_dir_));
ASSERT_OK(env_->GetChildren(test_dir_, &children));
ASSERT_OK(env_->FileExists(test_dir_));
ASSERT_OK(env_->GetChildrenFileAttributes(test_dir_, &childAttr));
ASSERT_EQ(0U, children.size());
ASSERT_EQ(0U, childAttr.size());
// folder with contents returns relative path to test dir
ASSERT_OK(env_->CreateDirIfMissing(test_dir_ + "/niu"));
ASSERT_OK(env_->CreateDirIfMissing(test_dir_ + "/you"));
ASSERT_OK(env_->CreateDirIfMissing(test_dir_ + "/guo"));
ASSERT_OK(env_->GetChildren(test_dir_, &children));
ASSERT_OK(env_->GetChildrenFileAttributes(test_dir_, &childAttr));
ASSERT_EQ(3U, children.size());
ASSERT_EQ(3U, childAttr.size());
for (auto each : children) {
env_->DeleteDir(test_dir_ + "/" + each).PermitUncheckedError();
} // necessary for default POSIX env
// non-exist directory returns IOError
ASSERT_OK(env_->DeleteDir(test_dir_));
ASSERT_NOK(env_->FileExists(test_dir_));
ASSERT_NOK(env_->GetChildren(test_dir_, &children));
ASSERT_NOK(env_->GetChildrenFileAttributes(test_dir_, &childAttr));
// if dir is a file, returns IOError
ASSERT_OK(env_->CreateDir(test_dir_));
std::unique_ptr<WritableFile> writable_file;
ASSERT_OK(
env_->NewWritableFile(test_dir_ + "/file", &writable_file, soptions_));
ASSERT_OK(writable_file->Close());
writable_file.reset();
ASSERT_NOK(env_->GetChildren(test_dir_ + "/file", &children));
ASSERT_EQ(0U, children.size());
}
TEST_P(EnvMoreTestWithParam, GetChildrenIgnoresDotAndDotDot) {
auto* env = Env::Default();
ASSERT_OK(env->CreateDirIfMissing(test_dir_));
// Create a single file
std::string path = test_dir_;
const EnvOptions soptions;
#ifdef OS_WIN
path.append("\\test_file");
#else
path.append("/test_file");
#endif
std::string data("test data");
std::unique_ptr<WritableFile> file;
ASSERT_OK(env->NewWritableFile(path, &file, soptions));
ASSERT_OK(file->Append("test data"));
// get the children
std::vector<std::string> result;
ASSERT_OK(env->GetChildren(test_dir_, &result));
// expect only one file named `test_data`, i.e. no `.` or `..` names
ASSERT_EQ(result.size(), 1);
ASSERT_EQ(result.at(0), "test_file");
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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