48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "components/zucchini/crc32.h"
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#include <stdint.h>
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#include <iterator>
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#include "base/test/gtest_util.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace zucchini {
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constexpr uint8_t bytes[] = {0x10, 0x32, 0x54, 0x76, 0x98,
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0xBA, 0xDC, 0xFE, 0x10, 0x00};
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TEST(Crc32Test, All) {
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// Results can be verified with any CRC-32 calculator found online.
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// Empty region.
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EXPECT_EQ(0x00000000U, CalculateCrc32(std::begin(bytes), std::begin(bytes)));
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// Single byte.
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EXPECT_EQ(0xCFB5FFE9U,
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CalculateCrc32(std::begin(bytes), std::begin(bytes) + 1));
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// Same byte (0x10) appearing at different location.
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EXPECT_EQ(0xCFB5FFE9U,
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CalculateCrc32(std::begin(bytes) + 8, std::begin(bytes) + 9));
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// Single byte of 0.
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EXPECT_EQ(0xD202EF8DU,
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CalculateCrc32(std::begin(bytes) + 9, std::end(bytes)));
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// Whole region.
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EXPECT_EQ(0xA86FD7D6U, CalculateCrc32(std::begin(bytes), std::end(bytes)));
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// Whole region excluding 0 at end.
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EXPECT_EQ(0x0762F38BU,
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CalculateCrc32(std::begin(bytes), std::begin(bytes) + 9));
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EXPECT_DCHECK_DEATH(CalculateCrc32(std::begin(bytes) + 1, std::begin(bytes)));
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}
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} // namespace zucchini
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