/*
 *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "rtc_base/crc32.h"

#include <cstddef>
#include <cstdint>
#include <string>

#include "test/gtest.h"

namespace webrtc {

TEST(Crc32Test, TestBasic) {
  EXPECT_EQ(0U, ComputeCrc32(""));
  EXPECT_EQ(0x352441C2U, ComputeCrc32("abc"));
  EXPECT_EQ(
      0x171A3F5FU,
      ComputeCrc32("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"));
}

TEST(Crc32Test, TestMultipleUpdates) {
  std::string input =
      "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq";
  uint32_t c = 0;
  for (size_t i = 0; i < input.size(); ++i) {
    c = UpdateCrc32(c, &input[i], 1);
  }
  EXPECT_EQ(0x171A3F5FU, c);
}

}  // namespace webrtc