1 // Copyright 2020 The Pigweed Authors
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
7 // https://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
20 #include "gtest/gtest.h"
21 #include "pw_blob_store/blob_store.h"
22 #include "pw_kvs/crc16_checksum.h"
23 #include "pw_kvs/fake_flash_memory.h"
24 #include "pw_kvs/flash_memory.h"
25 #include "pw_kvs/test_key_value_store.h"
26 #include "pw_log/log.h"
27 #include "pw_random/xor_shift.h"
29 namespace pw::blob_store {
32 class DeferredWriteTest : public ::testing::Test {
34 DeferredWriteTest() : flash_(kFlashAlignment), partition_(&flash_) {}
36 void InitFlashTo(std::span<const std::byte> contents) {
38 std::memcpy(flash_.buffer().data(), contents.data(), contents.size());
41 void InitBufferToRandom(uint64_t seed) {
43 random::XorShiftStarRng64 rng(seed);
47 void InitBufferToFill(char fill) {
49 std::memset(buffer_.data(), fill, buffer_.size());
52 // Fill the source buffer with random pattern based on given seed, written to
53 // BlobStore in specified chunk size.
54 void ChunkWriteTest(size_t chunk_size, size_t flush_interval) {
55 constexpr size_t kWriteSize = 64;
56 kvs::ChecksumCrc16 checksum;
58 size_t bytes_since_flush = 0;
61 snprintf(name, sizeof(name), "Blob%u", static_cast<unsigned>(chunk_size));
63 BlobStoreBuffer<kBufferSize> blob(
64 name, partition_, &checksum, kvs::TestKvs(), kWriteSize);
65 EXPECT_EQ(OkStatus(), blob.Init());
67 BlobStore::DeferredWriter writer(blob);
68 EXPECT_EQ(OkStatus(), writer.Open());
70 ByteSpan source = buffer_;
71 while (source.size_bytes() > 0) {
72 const size_t write_size = std::min(source.size_bytes(), chunk_size);
74 PW_LOG_DEBUG("Do write of %u bytes, %u bytes remain",
75 static_cast<unsigned>(write_size),
76 static_cast<unsigned>(source.size_bytes()));
78 ASSERT_EQ(OkStatus(), writer.Write(source.first(write_size)));
79 // TODO: Add check that the write did not go to flash yet.
81 source = source.subspan(write_size);
82 bytes_since_flush += write_size;
84 if (bytes_since_flush >= flush_interval) {
85 bytes_since_flush = 0;
86 ASSERT_EQ(OkStatus(), writer.Flush());
90 EXPECT_EQ(OkStatus(), writer.Close());
92 // Use reader to check for valid data.
93 BlobStore::BlobReader reader(blob);
94 ASSERT_EQ(OkStatus(), reader.Open());
95 Result<ConstByteSpan> result = reader.GetMemoryMappedBlob();
96 ASSERT_TRUE(result.ok());
97 VerifyFlash(result.value());
98 EXPECT_EQ(OkStatus(), reader.Close());
101 void VerifyFlash(ConstByteSpan verify_bytes) {
102 // Should be defined as same size.
103 EXPECT_EQ(buffer_.size(), flash_.buffer().size_bytes());
105 // Can't allow it to march off the end of buffer_.
106 ASSERT_LE(verify_bytes.size_bytes(), buffer_.size());
108 for (size_t i = 0; i < verify_bytes.size_bytes(); i++) {
109 EXPECT_EQ(buffer_[i], verify_bytes[i]);
113 static constexpr size_t kFlashAlignment = 16;
114 static constexpr size_t kSectorSize = 1024;
115 static constexpr size_t kSectorCount = 4;
116 static constexpr size_t kBufferSize = 2 * kSectorSize;
118 kvs::FakeFlashMemoryBuffer<kSectorSize, kSectorCount> flash_;
119 kvs::FlashPartition partition_;
120 std::array<std::byte, kSectorCount * kSectorSize> buffer_;
123 TEST_F(DeferredWriteTest, ChunkWrite1) {
124 InitBufferToRandom(0x8675309);
125 ChunkWriteTest(1, 16);
128 TEST_F(DeferredWriteTest, ChunkWrite2) {
129 InitBufferToRandom(0x8675);
130 ChunkWriteTest(2, 16);
133 TEST_F(DeferredWriteTest, ChunkWrite3) {
135 ChunkWriteTest(3, 16);
138 TEST_F(DeferredWriteTest, ChunkWrite4) {
140 ChunkWriteTest(4, 64);
143 TEST_F(DeferredWriteTest, ChunkWrite5) {
144 InitBufferToFill(0xff);
145 ChunkWriteTest(5, 64);
148 TEST_F(DeferredWriteTest, ChunkWrite16) {
149 InitBufferToRandom(0x86);
150 ChunkWriteTest(16, 128);
153 TEST_F(DeferredWriteTest, ChunkWrite64) {
154 InitBufferToRandom(0x9);
155 ChunkWriteTest(64, 128);
158 TEST_F(DeferredWriteTest, ChunkWrite64FullBufferFill) {
159 InitBufferToRandom(0x9);
160 ChunkWriteTest(64, kBufferSize);
163 TEST_F(DeferredWriteTest, ChunkWrite256) {
164 InitBufferToRandom(0x12345678);
165 ChunkWriteTest(256, 256);
168 // TODO: test that has dirty flash, invalidated blob, open writer, invalidate
169 // (not erase) and start writing (does the auto/implicit erase).
171 // TODO: test that has dirty flash, invalidated blob, open writer, explicit
172 // erase and start writing.
174 // TODO: test start with dirty flash/invalid blob, open writer, write, close.
175 // Verifies erase logic when write buffer has contents.
178 } // namespace pw::blob_store