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56 linhas
1.6 KiB
56 linhas
1.6 KiB
// Copyright (c) 2011 The LevelDB 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. See the AUTHORS file for names of contributors.
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#include "util/crc32c.h"
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#include "gtest/gtest.h"
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namespace leveldb {
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namespace crc32c {
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TEST(CRC, StandardResults) {
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// From rfc3720 section B.4.
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char buf[32];
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memset(buf, 0, sizeof(buf));
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ASSERT_EQ(0x8a9136aa, Value(buf, sizeof(buf)));
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memset(buf, 0xff, sizeof(buf));
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ASSERT_EQ(0x62a8ab43, Value(buf, sizeof(buf)));
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for (int i = 0; i < 32; i++) {
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buf[i] = i;
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}
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ASSERT_EQ(0x46dd794e, Value(buf, sizeof(buf)));
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for (int i = 0; i < 32; i++) {
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buf[i] = 31 - i;
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}
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ASSERT_EQ(0x113fdb5c, Value(buf, sizeof(buf)));
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uint8_t data[48] = {
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0x01, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00,
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0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x18, 0x28, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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ASSERT_EQ(0xd9963a56, Value(reinterpret_cast<char*>(data), sizeof(data)));
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}
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TEST(CRC, Values) { ASSERT_NE(Value("a", 1), Value("foo", 3)); }
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TEST(CRC, Extend) {
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ASSERT_EQ(Value("hello world", 11), Extend(Value("hello ", 6), "world", 5));
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}
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TEST(CRC, Mask) {
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uint32_t crc = Value("foo", 3);
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ASSERT_NE(crc, Mask(crc));
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ASSERT_NE(crc, Mask(Mask(crc)));
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ASSERT_EQ(crc, Unmask(Mask(crc)));
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ASSERT_EQ(crc, Unmask(Unmask(Mask(Mask(crc)))));
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}
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} // namespace crc32c
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} // namespace leveldb
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