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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
// 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_kvs/checksum.h"
#include "gtest/gtest.h"
#include "pw_kvs/crc16_checksum.h"
namespace pw::kvs {
namespace {
using std::byte;
constexpr std::string_view kString =
"In the beginning the Universe was created. This has made a lot of "
"people very angry and been widely regarded as a bad move.";
constexpr uint16_t kStringCrc = 0xC184;
TEST(Checksum, UpdateAndVerify) {
ChecksumCrc16 crc16_algo;
ChecksumAlgorithm& algo = crc16_algo;
algo.Update(, kString.size());
EXPECT_EQ(Status::OK, algo.Verify(as_bytes(span(&kStringCrc, 1))));
TEST(Checksum, Verify_Failure) {
ChecksumCrc16 algo;
EXPECT_EQ(Status::DATA_LOSS, algo.Verify(as_bytes(span(, 2))));
TEST(Checksum, Verify_InvalidSize) {
ChecksumCrc16 algo;
EXPECT_EQ(Status::INVALID_ARGUMENT, algo.Verify({}));
algo.Verify(as_bytes(span(kString.substr(0, 1)))));
TEST(Checksum, Verify_LargerState_ComparesToTruncatedData) {
byte crc[3] = {byte{0x84}, byte{0xC1}, byte{0x33}};
ChecksumCrc16 algo;
ASSERT_GT(sizeof(crc), algo.size_bytes());
EXPECT_EQ(Status::OK, algo.Verify(crc));
TEST(Checksum, Reset) {
ChecksumCrc16 crc_algo;
EXPECT_EQ(crc_algo.state()[0], byte{0xFF});
EXPECT_EQ(crc_algo.state()[1], byte{0xFF});
} // namespace
} // namespace pw::kvs