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Diffstat (limited to 'crc32_unittest.cc')
-rw-r--r-- | crc32_unittest.cc | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/crc32_unittest.cc b/crc32_unittest.cc new file mode 100644 index 0000000..5ec85a8 --- /dev/null +++ b/crc32_unittest.cc @@ -0,0 +1,47 @@ +// Copyright 2017 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "components/zucchini/crc32.h" + +#include <stdint.h> + +#include <iterator> + +#include "base/test/gtest_util.h" +#include "testing/gtest/include/gtest/gtest.h" + +namespace zucchini { + +constexpr uint8_t bytes[] = {0x10, 0x32, 0x54, 0x76, 0x98, + 0xBA, 0xDC, 0xFE, 0x10, 0x00}; + +TEST(Crc32Test, All) { + // Results can be verified with any CRC-32 calculator found online. + + // Empty region. + EXPECT_EQ(0x00000000U, CalculateCrc32(std::begin(bytes), std::begin(bytes))); + + // Single byte. + EXPECT_EQ(0xCFB5FFE9U, + CalculateCrc32(std::begin(bytes), std::begin(bytes) + 1)); + + // Same byte (0x10) appearing at different location. + EXPECT_EQ(0xCFB5FFE9U, + CalculateCrc32(std::begin(bytes) + 8, std::begin(bytes) + 9)); + + // Single byte of 0. + EXPECT_EQ(0xD202EF8DU, + CalculateCrc32(std::begin(bytes) + 9, std::end(bytes))); + + // Whole region. + EXPECT_EQ(0xA86FD7D6U, CalculateCrc32(std::begin(bytes), std::end(bytes))); + + // Whole region excluding 0 at end. + EXPECT_EQ(0x0762F38BU, + CalculateCrc32(std::begin(bytes), std::begin(bytes) + 9)); + + EXPECT_DCHECK_DEATH(CalculateCrc32(std::begin(bytes) + 1, std::begin(bytes))); +} + +} // namespace zucchini |