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// Copyright 2020 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 <array>
#include <cstddef>
#include <cstring>
#include <span>
#include "gtest/gtest.h"
#include "pw_blob_store/blob_store.h"
#include "pw_kvs/crc16_checksum.h"
#include "pw_kvs/fake_flash_memory.h"
#include "pw_kvs/flash_memory.h"
#include "pw_kvs/test_key_value_store.h"
#include "pw_log/log.h"
#include "pw_random/xor_shift.h"
namespace pw::blob_store {
namespace {
class BlobStoreChunkTest : public ::testing::Test {
protected:
BlobStoreChunkTest() : flash_(kFlashAlignment), partition_(&flash_) {}
void InitFlashTo(std::span<const std::byte> contents) {
partition_.Erase()
.IgnoreError(); // TODO(pwbug/387): Handle Status properly
std::memcpy(flash_.buffer().data(), contents.data(), contents.size());
}
void InitSourceBufferToRandom(uint64_t seed) {
partition_.Erase()
.IgnoreError(); // TODO(pwbug/387): Handle Status properly
random::XorShiftStarRng64 rng(seed);
rng.Get(source_buffer_)
.IgnoreError(); // TODO(pwbug/387): Handle Status properly
}
void InitSourceBufferToFill(char fill) {
partition_.Erase()
.IgnoreError(); // TODO(pwbug/387): Handle Status properly
std::memset(source_buffer_.data(), fill, source_buffer_.size());
}
// Fill the source buffer with random pattern based on given seed, written to
// BlobStore in specified chunk size.
void ChunkWriteTest(size_t chunk_size) {
constexpr size_t kBufferSize = 256;
kvs::ChecksumCrc16 checksum;
char name[16] = {};
snprintf(name, sizeof(name), "Blob%u", static_cast<unsigned>(chunk_size));
BlobStoreBuffer<kBufferSize> blob(
name, partition_, &checksum, kvs::TestKvs(), kBufferSize);
EXPECT_EQ(OkStatus(), blob.Init());
BlobStore::BlobWriter writer(blob, metadata_buffer_);
EXPECT_EQ(OkStatus(), writer.Open());
EXPECT_EQ(OkStatus(), writer.Erase());
ByteSpan source = source_buffer_;
while (source.size_bytes() > 0) {
const size_t write_size = std::min(source.size_bytes(), chunk_size);
PW_LOG_DEBUG("Do write of %u bytes, %u bytes remain",
static_cast<unsigned>(write_size),
static_cast<unsigned>(source.size_bytes()));
ASSERT_EQ(OkStatus(), writer.Write(source.first(write_size)));
source = source.subspan(write_size);
}
EXPECT_EQ(OkStatus(), writer.Close());
// Use reader to check for valid data.
BlobStore::BlobReader reader(blob);
ASSERT_EQ(OkStatus(), reader.Open());
Result<ConstByteSpan> result = reader.GetMemoryMappedBlob();
ASSERT_TRUE(result.ok());
VerifyFlash(result.value());
EXPECT_EQ(OkStatus(), reader.Close());
}
void VerifyFlash(ConstByteSpan verify_bytes) {
// Should be defined as same size.
EXPECT_EQ(source_buffer_.size(), flash_.buffer().size_bytes());
// Can't allow it to march off the end of source_buffer_.
ASSERT_LE(verify_bytes.size_bytes(), source_buffer_.size());
for (size_t i = 0; i < verify_bytes.size_bytes(); i++) {
EXPECT_EQ(source_buffer_[i], verify_bytes[i]);
}
}
static constexpr size_t kFlashAlignment = 16;
static constexpr size_t kSectorSize = 2048;
static constexpr size_t kSectorCount = 2;
static constexpr size_t kBlobDataSize = (kSectorCount * kSectorSize);
static constexpr size_t kMetadataBufferSize =
BlobStore::BlobWriter::RequiredMetadataBufferSize(0);
kvs::FakeFlashMemoryBuffer<kSectorSize, kSectorCount> flash_;
kvs::FlashPartition partition_;
std::array<std::byte, kMetadataBufferSize> metadata_buffer_;
std::array<std::byte, kBlobDataSize> source_buffer_;
};
TEST_F(BlobStoreChunkTest, ChunkWrite1) {
InitSourceBufferToRandom(0x8675309);
ChunkWriteTest(1);
}
TEST_F(BlobStoreChunkTest, ChunkWrite2) {
InitSourceBufferToRandom(0x8675);
ChunkWriteTest(2);
}
TEST_F(BlobStoreChunkTest, ChunkWrite3) {
InitSourceBufferToFill(0);
ChunkWriteTest(3);
}
TEST_F(BlobStoreChunkTest, ChunkWrite4) {
InitSourceBufferToFill(1);
ChunkWriteTest(4);
}
TEST_F(BlobStoreChunkTest, ChunkWrite5) {
InitSourceBufferToFill(0xff);
ChunkWriteTest(5);
}
TEST_F(BlobStoreChunkTest, ChunkWrite16) {
InitSourceBufferToRandom(0x86);
ChunkWriteTest(16);
}
TEST_F(BlobStoreChunkTest, ChunkWrite64) {
InitSourceBufferToRandom(0x9);
ChunkWriteTest(64);
}
TEST_F(BlobStoreChunkTest, ChunkWrite256) {
InitSourceBufferToRandom(0x12345678);
ChunkWriteTest(256);
}
TEST_F(BlobStoreChunkTest, ChunkWrite512) {
InitSourceBufferToRandom(0x42);
ChunkWriteTest(512);
}
TEST_F(BlobStoreChunkTest, ChunkWrite4096) {
InitSourceBufferToRandom(0x89);
ChunkWriteTest(4096);
}
TEST_F(BlobStoreChunkTest, ChunkWriteSingleFull) {
InitSourceBufferToRandom(0x98765);
ChunkWriteTest(kBlobDataSize);
}
} // namespace
} // namespace pw::blob_store
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