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Add MurmurHash3() unit test 

Useful as a source of test vectors to anyone re-implementing bloom
filters.
This commit is contained in:
Peter Todd 2013-08-20 07:30:39 -04:00
parent af6a02a99b
commit 4eecdcacaf
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1 changed files with 44 additions and 0 deletions
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src/test/hash_tests.cpp Normal file
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#include <boost/test/unit_test.hpp>
#include <vector>
#include "util.h"
#include "hash.h"
using namespace std;
BOOST_AUTO_TEST_SUITE(hash_tests)
BOOST_AUTO_TEST_CASE(murmurhash3)
{
#define T(expected, seed, data) BOOST_CHECK_EQUAL(MurmurHash3(seed, ParseHex(data)), expected)
// Test MurmurHash3 with various inputs. Of course this is retested in the
// bloom filter tests - they would fail if MurmurHash3() had any problems -
// but is useful for those trying to implement Bitcoin libraries as a
// source of test data for their MurmurHash3() primitive during
// development.
//
// The magic number 0xFBA4C795 comes from CBloomFilter::Hash()
T(0x00000000, 0x00000000, "");
T(0x6a396f08, 0xFBA4C795, "");
T(0x81f16f39, 0xffffffff, "");
T(0x514e28b7, 0x00000000, "00");
T(0xea3f0b17, 0xFBA4C795, "00");
T(0xfd6cf10d, 0x00000000, "ff");
T(0x16c6b7ab, 0x00000000, "0011");
T(0x8eb51c3d, 0x00000000, "001122");
T(0xb4471bf8, 0x00000000, "00112233");
T(0xe2301fa8, 0x00000000, "0011223344");
T(0xfc2e4a15, 0x00000000, "001122334455");
T(0xb074502c, 0x00000000, "00112233445566");
T(0x8034d2a0, 0x00000000, "0011223344556677");
T(0xb4698def, 0x00000000, "001122334455667788");
#undef T
}
BOOST_AUTO_TEST_SUITE_END()