text: // Copyright (c) 2012-2015 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "compressor.h"
  #include "test/test_bitcoin.h"
  #include "util.h"
  
  #include <cstdint>
  
  #include <boost/test/unit_test.hpp>
  
  // amounts 0.00000001 .. 0.00100000
  #define NUM_MULTIPLES_UNIT 100000
  
  // amounts 0.01 .. 100.00
  #define NUM_MULTIPLES_CENT 10000
  
  // amounts 1 .. 10000
  #define NUM_MULTIPLES_1BCH 10000
  
  // amounts 50 .. 21000000
  #define NUM_MULTIPLES_50BCH 420000
  
  BOOST_FIXTURE_TEST_SUITE(compress_tests, BasicTestingSetup)
  
  static bool TestEncode(Amount in) {
      return in.toInt() == CTxOutCompressor::DecompressAmount(
                       CTxOutCompressor::CompressAmount(in.toInt()));
  }
  
  static bool TestDecode(uint64_t in) {
      return in == CTxOutCompressor::CompressAmount(
                       CTxOutCompressor::DecompressAmount(in));
  }
  
  static bool TestPair(Amount dec, uint64_t enc) {
      return CTxOutCompressor::CompressAmount(dec.toInt()) == enc &&
             CTxOutCompressor::DecompressAmount(enc) == dec.toInt();
  }
  
  BOOST_AUTO_TEST_CASE(compress_amounts) {
      BOOST_CHECK(TestPair(Amount::zero(), 0x0));
      BOOST_CHECK(TestPair(Amount::min_amount(), 0x6));
      BOOST_CHECK(TestPair(CENT, 0x7));
      BOOST_CHECK(TestPair(COIN, 0x9));
      BOOST_CHECK(TestPair(50 * COIN, 0x32));
      BOOST_CHECK(TestPair(21000000 * COIN, 0x1406f40));
  
      for (int64_t i = 1; i <= NUM_MULTIPLES_UNIT; i++) {
          BOOST_CHECK(TestEncode(Amount(i)));
      }
  
      for (int64_t i = 1; i <= NUM_MULTIPLES_CENT; i++) {
          BOOST_CHECK(TestEncode(i * CENT));
      }
  
      for (int64_t i = 1; i <= NUM_MULTIPLES_1BCH; i++) {
          BOOST_CHECK(TestEncode(i * COIN));
      }
  
      for (int64_t i = 1; i <= NUM_MULTIPLES_50BCH; i++) {
          BOOST_CHECK(TestEncode(i * 50 * COIN));
      }
  
      for (int64_t i = 0; i < 100000; i++) {
          BOOST_CHECK(TestDecode(i));
      }
  }
  
  BOOST_AUTO_TEST_SUITE_END()
  