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Merge #7705: [amount] Add tests and make GetFee() monotonic

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fad13b1 [amount] Preempt issues with negative fee rates (MarcoFalke)
faf756a [amount] Make GetFee() monotonic (MarcoFalke)
fab6880 [qa] Add amount tests (MarcoFalke)
This commit is contained in:
Wladimir J. van der Laan 2016-03-21 12:25:13 +01:00 committed by Alexander Block
parent 721171ee39
commit 8fde2fd5fa
4 changed files with 54 additions and 7 deletions
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1
src/Makefile.test.include
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@ -38,6 +38,7 @@ BITCOIN_TESTS =\
test/scriptnum10.h \ test/scriptnum10.h \
test/addrman_tests.cpp \ test/addrman_tests.cpp \
test/alert_tests.cpp \ test/alert_tests.cpp \
test/amount_tests.cpp \
test/allocator_tests.cpp \ test/allocator_tests.cpp \
test/base32_tests.cpp \ test/base32_tests.cpp \
test/base58_tests.cpp \ test/base58_tests.cpp \

6
src/amount.cpp
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@ -19,10 +19,10 @@ CFeeRate::CFeeRate(const CAmount& nFeePaid, size_t nSize)
CAmount CFeeRate::GetFee(size_t nSize) const CAmount CFeeRate::GetFee(size_t nSize) const
{ {
CAmount nFee = nSatoshisPerK*nSize / 1000; CAmount nFee = nSatoshisPerK * nSize / 1000;
if (nFee == 0 && nSatoshisPerK > 0) if (nFee == 0 && nSize != 0 && nSatoshisPerK > 0)
nFee = nSatoshisPerK; nFee = CAmount(1);
return nFee; return nFee;
} }

12
src/amount.h
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@ -42,10 +42,14 @@ public:
explicit CFeeRate(const CAmount& _nSatoshisPerK): nSatoshisPerK(_nSatoshisPerK) { } explicit CFeeRate(const CAmount& _nSatoshisPerK): nSatoshisPerK(_nSatoshisPerK) { }
CFeeRate(const CAmount& nFeePaid, size_t nSize); CFeeRate(const CAmount& nFeePaid, size_t nSize);
CFeeRate(const CFeeRate& other) { nSatoshisPerK = other.nSatoshisPerK; } CFeeRate(const CFeeRate& other) { nSatoshisPerK = other.nSatoshisPerK; }
/**
CAmount GetFee(size_t size) const; // unit returned is satoshis * Return the fee in satoshis for the given size in bytes.
CAmount GetFeePerK() const { return GetFee(1000); } // satoshis-per-1000-bytes */
CAmount GetFee(size_t size) const;
/**
* Return the fee in satoshis for a size of 1000 bytes
*/
CAmount GetFeePerK() const { return GetFee(1000); }
friend bool operator<(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK < b.nSatoshisPerK; } friend bool operator<(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK < b.nSatoshisPerK; }
friend bool operator>(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK > b.nSatoshisPerK; } friend bool operator>(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK > b.nSatoshisPerK; }
friend bool operator==(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK == b.nSatoshisPerK; } friend bool operator==(const CFeeRate& a, const CFeeRate& b) { return a.nSatoshisPerK == b.nSatoshisPerK; }

42
src/test/amount_tests.cpp Normal file
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@ -0,0 +1,42 @@
// Copyright (c) 2016 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 "amount.h"
#include "test/test_dash.h"
#include <boost/test/unit_test.hpp>
BOOST_FIXTURE_TEST_SUITE(amount_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(GetFeeTest)
{
CFeeRate feeRate;
feeRate = CFeeRate(0);
// Must always return 0
BOOST_CHECK_EQUAL(feeRate.GetFee(0), 0);
BOOST_CHECK_EQUAL(feeRate.GetFee(1e5), 0);
feeRate = CFeeRate(1000);
// Must always just return the arg
BOOST_CHECK_EQUAL(feeRate.GetFee(0), 0);
BOOST_CHECK_EQUAL(feeRate.GetFee(1), 1);
BOOST_CHECK_EQUAL(feeRate.GetFee(121), 121);
BOOST_CHECK_EQUAL(feeRate.GetFee(999), 999);
BOOST_CHECK_EQUAL(feeRate.GetFee(1e3), 1e3);
BOOST_CHECK_EQUAL(feeRate.GetFee(9e3), 9e3);
feeRate = CFeeRate(123);
// Truncates the result, if not integer
BOOST_CHECK_EQUAL(feeRate.GetFee(0), 0);
BOOST_CHECK_EQUAL(feeRate.GetFee(8), 1); // Special case: returns 1 instead of 0
BOOST_CHECK_EQUAL(feeRate.GetFee(9), 1);
BOOST_CHECK_EQUAL(feeRate.GetFee(121), 14);
BOOST_CHECK_EQUAL(feeRate.GetFee(122), 15);
BOOST_CHECK_EQUAL(feeRate.GetFee(999), 122);
BOOST_CHECK_EQUAL(feeRate.GetFee(1e3), 123);
BOOST_CHECK_EQUAL(feeRate.GetFee(9e3), 1107);
}
BOOST_AUTO_TEST_SUITE_END()