Differential D529 Diff 1378 src/test/amount_tests.cpp

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src/test/amount_tests.cpp

// Copyright (c) 2016 The Bitcoin Core developers		// Copyright (c) 2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying		// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.		// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "amount.h"		#include "amount.h"
#include "test/test_bitcoin.h"		#include "test/test_bitcoin.h"

#include <boost/test/unit_test.hpp>		#include <boost/test/unit_test.hpp>

		// Snippit to allow compile time introspection for multiplication operator
		// Used to ensure that certain operations are not implemented on Amount
		namespace Check {
		class No {
		public:
		bool b[2];
		};
		template <typename T, typename Arg> No operator*(const T &, const Arg &);

		bool Check(...);
		No &Check(const No &);

		template <typename T, typename Arg = T> struct MultiplicationExists {
		enum { value = (sizeof(Check((T )(0) * (Arg )(0))) != sizeof(No)) };
		};
		} // namespace Check

BOOST_FIXTURE_TEST_SUITE(amount_tests, BasicTestingSetup)		BOOST_FIXTURE_TEST_SUITE(amount_tests, BasicTestingSetup)

		BOOST_AUTO_TEST_CASE(CAmountTests) {
		BOOST_CHECK(Amount(2) <= Amount(2));
		BOOST_CHECK(Amount(2) <= Amount(3));

		BOOST_CHECK(Amount(2) >= Amount(2));
		BOOST_CHECK(Amount(3) >= Amount(2));

		BOOST_CHECK(Amount(1) < Amount(2));
		BOOST_CHECK(Amount(-1) < Amount(0));

		BOOST_CHECK(Amount(2) > Amount(1));
		BOOST_CHECK(Amount(0) > Amount(-1));

		BOOST_CHECK(Amount(1) < Amount(2));
		BOOST_CHECK(Amount(-1) < Amount(0));

		BOOST_CHECK(Amount(2) > Amount(1));
		BOOST_CHECK(Amount(0) > Amount(-1));

		BOOST_CHECK(Amount(0) == Amount(0));
		BOOST_CHECK(Amount(0) != Amount(1));

		Amount amount(0);
		BOOST_CHECK_EQUAL(amount += Amount(1), Amount(1));
		BOOST_CHECK_EQUAL(amount += Amount(-1), Amount(0));
		BOOST_CHECK_EQUAL(amount -= Amount(1), Amount(-1));
		BOOST_CHECK_EQUAL(amount -= Amount(-1), Amount(0));

		BOOST_CHECK_EQUAL(COIN + COIN, Amount(2 * COIN));
		BOOST_CHECK_EQUAL(2 * COIN + COIN, Amount(3 * COIN));
		BOOST_CHECK_EQUAL(-1 * COIN + COIN, Amount(0));

		BOOST_CHECK_EQUAL(COIN - COIN, Amount(0));
		BOOST_CHECK_EQUAL(COIN - 2 * COIN, -1 * COIN);

		BOOST_CHECK_EQUAL(10 * Amount(10), Amount(100));
		BOOST_CHECK_EQUAL(-1 * Amount(1), Amount(-1));

		// The C preprocessor will now allow passing a template type into a macro
		// directly, so we must define these aliases.
		using impl_int = Check::MultiplicationExists<int64_t, Amount>;
		using impl_float = Check::MultiplicationExists<double, Amount>;
		BOOST_CHECK(impl_int::value);
		BOOST_CHECK(!impl_float::value);

		BOOST_CHECK_EQUAL(Amount(100).GetSatoshis() / 10, 10);
		// This should probably be Banker's rounding,
		// but that's a large change
		BOOST_CHECK_EQUAL(Amount(100).GetSatoshis() / 3, 33);
		BOOST_CHECK_EQUAL(Amount(101).GetSatoshis() / 3, 33);

		// Modulus
		BOOST_CHECK_EQUAL(COIN.GetSatoshis() % 1, Amount(0));
		BOOST_CHECK_EQUAL((3 * COIN.GetSatoshis()) % (2 * COIN.GetSatoshis()),
		COIN);
		}

BOOST_AUTO_TEST_CASE(GetFeeTest) {		BOOST_AUTO_TEST_CASE(GetFeeTest) {
CFeeRate feeRate;		CFeeRate feeRate;

feeRate = CFeeRate(0);		feeRate = CFeeRate(0);
// Must always return 0		// Must always return 0
BOOST_CHECK_EQUAL(feeRate.GetFee(0), 0);		BOOST_CHECK_EQUAL(feeRate.GetFee(0), 0);
BOOST_CHECK_EQUAL(feeRate.GetFee(1e5), 0);		BOOST_CHECK_EQUAL(feeRate.GetFee(1e5), 0);

▲ Show 20 Lines • Show All 41 Lines • ▼ Show 20 Lines	BOOST_AUTO_TEST_CASE(GetFeeTest) {
BOOST_CHECK(CFeeRate(CAmount(1), 1000) == CFeeRate(1));		BOOST_CHECK(CFeeRate(CAmount(1), 1000) == CFeeRate(1));
// lost precision (can only resolve satoshis per kB)		// lost precision (can only resolve satoshis per kB)
BOOST_CHECK(CFeeRate(CAmount(1), 1001) == CFeeRate(0));		BOOST_CHECK(CFeeRate(CAmount(1), 1001) == CFeeRate(0));
BOOST_CHECK(CFeeRate(CAmount(2), 1001) == CFeeRate(1));		BOOST_CHECK(CFeeRate(CAmount(2), 1001) == CFeeRate(1));
// some more integer checks		// some more integer checks
BOOST_CHECK(CFeeRate(CAmount(26), 789) == CFeeRate(32));		BOOST_CHECK(CFeeRate(CAmount(26), 789) == CFeeRate(32));
BOOST_CHECK(CFeeRate(CAmount(27), 789) == CFeeRate(34));		BOOST_CHECK(CFeeRate(CAmount(27), 789) == CFeeRate(34));
// Maximum size in bytes, should not crash		// Maximum size in bytes, should not crash
CFeeRate(MAX_MONEY, std::numeric_limits<size_t>::max() >> 1).GetFeePerK();		CFeeRate(MAX_MONEY.GetSatoshis(), std::numeric_limits<size_t>::max() >> 1)
		.GetFeePerK();
}		}

BOOST_AUTO_TEST_SUITE_END()		BOOST_AUTO_TEST_SUITE_END()