DragonX/hush3
1
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 1 Wiki Activity

ConvertBits() - convert from one power-of-2 number base to another.

Browse Source 
Function extracted from upstream:
  PR bitcoin/bitcoin#11167
  Commit c091b99379b97cb314c9fa123beabdbc324cf7a4
This commit is contained in:
Jack Grigg
2018-06-07 12:41:05 +12:00
parent 7e45636707
commit 6b759fb092
3 changed files with 77 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
src/test/convertbits_tests.cpp Normal file
View File

@@ -0,0 +1,52 @@
// Copyright (c) 2018 The Zcash developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <utilstrencodings.h>
#include <test/test_bitcoin.h>
#include <zcash/NoteEncryption.hpp>
#include <boost/test/unit_test.hpp>
BOOST_FIXTURE_TEST_SUITE(convertbits_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(convertbits_deterministic)
{
for (size_t i = 0; i < 256; i++) {
std::vector<unsigned char> input(32, i);
std::vector<unsigned char> data;
std::vector<unsigned char> output;
ConvertBits<8, 5, true>(data, input.begin(), input.end());
ConvertBits<5, 8, false>(output, data.begin(), data.end());
BOOST_CHECK_EQUAL(data.size(), 52);
BOOST_CHECK_EQUAL(output.size(), 32);
BOOST_CHECK(input == output);
}
for (size_t i = 0; i < 256; i++) {
std::vector<unsigned char> input(43, i);
std::vector<unsigned char> data;
std::vector<unsigned char> output;
ConvertBits<8, 5, true>(data, input.begin(), input.end());
ConvertBits<5, 8, false>(output, data.begin(), data.end());
BOOST_CHECK_EQUAL(data.size(), 69);
BOOST_CHECK_EQUAL(output.size(), 43);
BOOST_CHECK(input == output);
}
}
BOOST_AUTO_TEST_CASE(convertbits_random)
{
for (size_t i = 0; i < 1000; i++) {
auto input = libzcash::random_uint256();
std::vector<unsigned char> data;
std::vector<unsigned char> output;
ConvertBits<8, 5, true>(data, input.begin(), input.end());
ConvertBits<5, 8, false>(output, data.begin(), data.end());
BOOST_CHECK_EQUAL(data.size(), 52);
BOOST_CHECK_EQUAL(output.size(), 32);
BOOST_CHECK(input == uint256(output));
}
}
BOOST_AUTO_TEST_SUITE_END()