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// Copyright 2023 The Pigweed Authors
//
// 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
//
// https://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 "pw_persistent_ram/flat_file_system_entry.h"
#include "gtest/gtest.h"
namespace pw::persistent_ram {
namespace {
class FlatFileSystemPersistentBufferEntryTest : public ::testing::Test {
protected:
static constexpr uint32_t kBufferSize = 16;
static constexpr size_t kMaxFileNameLength = 32;
FlatFileSystemPersistentBufferEntryTest() {}
// Emulate invalidation of persistent section(s).
void ZeroPersistentMemory() { memset(buffer_, 0, sizeof(buffer_)); }
PersistentBuffer<kBufferSize>& GetPersistentBuffer() {
return *(new (buffer_) PersistentBuffer<kBufferSize>());
}
// Allocate a chunk of aligned storage that can be independently controlled.
alignas(PersistentBuffer<kBufferSize>)
std::byte buffer_[sizeof(PersistentBuffer<kBufferSize>)];
};
TEST_F(FlatFileSystemPersistentBufferEntryTest, BasicProperties) {
constexpr std::string_view kExpectedFileName("file_1.bin");
constexpr file::FlatFileSystemService::Entry::Id kExpectedFileId = 7;
constexpr file::FlatFileSystemService::Entry::FilePermissions
kExpectedPermissions =
file::FlatFileSystemService::Entry::FilePermissions::READ;
ZeroPersistentMemory();
auto& persistent = GetPersistentBuffer();
// write some data to create the file
constexpr uint32_t kExpectedNumber = 0x6C2C6582;
auto writer = persistent.GetWriter();
ASSERT_EQ(OkStatus(), writer.Write(as_bytes(span(&kExpectedNumber, 1))));
FlatFileSystemPersistentBufferEntry persistent_file(
kExpectedFileName, kExpectedFileId, kExpectedPermissions, persistent);
std::array<char, kMaxFileNameLength> tmp_buffer = {};
static_assert(kExpectedFileName.size() <= tmp_buffer.size());
StatusWithSize sws = persistent_file.Name(tmp_buffer);
ASSERT_EQ(OkStatus(), sws.status());
EXPECT_EQ(
0, std::memcmp(tmp_buffer.data(), kExpectedFileName.data(), sws.size()));
EXPECT_EQ(sizeof(kExpectedNumber), persistent_file.SizeBytes());
EXPECT_EQ(kExpectedPermissions, persistent_file.Permissions());
EXPECT_EQ(kExpectedFileId, persistent_file.FileId());
}
TEST_F(FlatFileSystemPersistentBufferEntryTest, Delete) {
constexpr std::string_view kExpectedFileName("file_2.bin");
constexpr file::FlatFileSystemService::Entry::Id kExpectedFileId = 8;
constexpr file::FlatFileSystemService::Entry::FilePermissions
kExpectedPermissions =
file::FlatFileSystemService::Entry::FilePermissions::WRITE;
ZeroPersistentMemory();
auto& persistent = GetPersistentBuffer();
// write some data to create the file
constexpr uint32_t kExpectedNumber = 0x6C2C6582;
auto writer = persistent.GetWriter();
ASSERT_EQ(OkStatus(), writer.Write(as_bytes(span(&kExpectedNumber, 1))));
FlatFileSystemPersistentBufferEntry persistent_file(
kExpectedFileName, kExpectedFileId, kExpectedPermissions, persistent);
std::array<char, kMaxFileNameLength> tmp_buffer = {};
static_assert(kExpectedFileName.size() <= tmp_buffer.size());
StatusWithSize sws = persistent_file.Name(tmp_buffer);
ASSERT_EQ(OkStatus(), sws.status());
EXPECT_EQ(
0, std::memcmp(tmp_buffer.data(), kExpectedFileName.data(), sws.size()));
EXPECT_EQ(sizeof(kExpectedNumber), persistent_file.SizeBytes());
ASSERT_EQ(OkStatus(), persistent_file.Delete());
sws = persistent_file.Name(tmp_buffer);
ASSERT_EQ(Status::NotFound(), sws.status());
EXPECT_EQ(0u, persistent_file.SizeBytes());
}
TEST_F(FlatFileSystemPersistentBufferEntryTest, NoData) {
constexpr std::string_view kExpectedFileName("file_2.bin");
constexpr file::FlatFileSystemService::Entry::Id kExpectedFileId = 9;
constexpr file::FlatFileSystemService::Entry::FilePermissions
kExpectedPermissions =
file::FlatFileSystemService::Entry::FilePermissions::READ_AND_WRITE;
ZeroPersistentMemory();
auto& persistent = GetPersistentBuffer();
FlatFileSystemPersistentBufferEntry persistent_file(
kExpectedFileName, kExpectedFileId, kExpectedPermissions, persistent);
std::array<char, kMaxFileNameLength> tmp_buffer = {};
static_assert(kExpectedFileName.size() <= tmp_buffer.size());
StatusWithSize sws = persistent_file.Name(tmp_buffer);
ASSERT_EQ(Status::NotFound(), sws.status());
EXPECT_EQ(0u, persistent_file.SizeBytes());
}
} // namespace
} // namespace pw::persistent_ram
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