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/********************* */
/*! \file bitvector_black.h
** \verbatim
** Top contributors (to current version):
** Andres Noetzli, Christopher L. Conway, Morgan Deters
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Black box testing of CVC4::BitVector
**
** Black box testing of CVC4::BitVector.
**/
#include <cxxtest/TestSuite.h>
#include <sstream>
#include "util/bitvector.h"
using namespace CVC4;
using namespace std;
class BitVectorBlack : public CxxTest::TestSuite {
public:
void setUp() override
{
zero = BitVector(4);
one = zero.setBit(0);
two = BitVector("0010", 2);
negOne = BitVector(4, Integer(-1));
}
void testStringConstructor()
{
BitVector b1("0101", 2);
TS_ASSERT_EQUALS(4u, b1.getSize());
TS_ASSERT_EQUALS("0101", b1.toString());
TS_ASSERT_EQUALS("5", b1.toString(10));
TS_ASSERT_EQUALS("5", b1.toString(16));
BitVector b2("000001", 2);
TS_ASSERT_EQUALS(6u, b2.getSize());
TS_ASSERT_EQUALS("000001", b2.toString());
TS_ASSERT_EQUALS("1", b2.toString(10));
TS_ASSERT_EQUALS("1", b2.toString(16));
BitVector b3("7f", 16);
TS_ASSERT_EQUALS(8u, b3.getSize());
TS_ASSERT_EQUALS("01111111", b3.toString());
TS_ASSERT_EQUALS("127", b3.toString(10));
TS_ASSERT_EQUALS("7f", b3.toString(16));
BitVector b4("01a", 16);
TS_ASSERT_EQUALS(12u, b4.getSize());
TS_ASSERT_EQUALS("000000011010", b4.toString());
TS_ASSERT_EQUALS("26", b4.toString(10));
TS_ASSERT_EQUALS("1a", b4.toString(16));
}
void testConversions()
{
TS_ASSERT_EQUALS(two.toSignedInteger(), Integer(2));
TS_ASSERT_EQUALS(negOne.toString(), "1111");
TS_ASSERT_EQUALS(negOne.getValue(), Integer(15));
TS_ASSERT_EQUALS(negOne.getSize(), 4);
TS_ASSERT_EQUALS(negOne.toInteger(), Integer(15));
TS_ASSERT_EQUALS(negOne.toSignedInteger(), Integer(-1));
TS_ASSERT_EQUALS(zero.hash(), (one - one).hash());
TS_ASSERT_DIFFERS(negOne.hash(), zero.hash());
}
void testSetGetBit()
{
TS_ASSERT_EQUALS(one.setBit(1).setBit(2).setBit(3), negOne);
TS_ASSERT(negOne.isBitSet(3));
TS_ASSERT(!two.isBitSet(3));
TS_ASSERT_EQUALS(one.getValue(), Integer(1));
TS_ASSERT_EQUALS(zero.isPow2(), 0);
TS_ASSERT_EQUALS(one.isPow2(), 1);
TS_ASSERT_EQUALS(two.isPow2(), 2);
TS_ASSERT_EQUALS(negOne.isPow2(), 0);
}
void testConcatExtract()
{
BitVector b = one.concat(zero);
TS_ASSERT_EQUALS(b.toString(), "00010000");
TS_ASSERT_EQUALS(b.extract(7, 4), one);
TS_ASSERT_THROWS(b.extract(4, 7), IllegalArgumentException&);
TS_ASSERT_THROWS(b.extract(8, 3), IllegalArgumentException&);
TS_ASSERT_EQUALS(b.concat(BitVector()), b);
}
void testComparisons()
{
TS_ASSERT_DIFFERS(zero, one);
TS_ASSERT(negOne > zero);
TS_ASSERT(negOne >= zero);
TS_ASSERT(negOne >= negOne);
TS_ASSERT(negOne == negOne);
TS_ASSERT(zero.unsignedLessThan(negOne));
TS_ASSERT(zero.unsignedLessThanEq(negOne));
TS_ASSERT(zero.unsignedLessThanEq(zero));
TS_ASSERT(zero < negOne);
TS_ASSERT(zero <= negOne);
TS_ASSERT(zero <= zero);
TS_ASSERT(negOne.signedLessThan(zero));
TS_ASSERT(negOne.signedLessThanEq(zero));
TS_ASSERT(negOne.signedLessThanEq(negOne));
BitVector b = negOne.concat(negOne);
TS_ASSERT_THROWS(b.unsignedLessThan(negOne), IllegalArgumentException&);
TS_ASSERT_THROWS(negOne.unsignedLessThanEq(b), IllegalArgumentException&);
TS_ASSERT_THROWS(b.signedLessThan(negOne), IllegalArgumentException&);
TS_ASSERT_THROWS(negOne.signedLessThanEq(b), IllegalArgumentException&);
}
void testBitwiseOps()
{
TS_ASSERT_EQUALS((one ^ negOne).toString(), "1110");
TS_ASSERT_EQUALS((two | one).toString(), "0011");
TS_ASSERT_EQUALS((negOne & two).toString(), "0010");
TS_ASSERT_EQUALS((~two).toString(), "1101");
}
void testArithmetic()
{
TS_ASSERT_EQUALS(negOne + one, zero);
TS_ASSERT_EQUALS((negOne - one).getValue(), Integer(14));
TS_ASSERT_EQUALS((-negOne).getValue(), Integer(1));
TS_ASSERT_EQUALS((two * (two + one)).getValue(), Integer(6));
TS_ASSERT_EQUALS(two.unsignedDivTotal(zero), negOne);
TS_ASSERT_EQUALS(negOne.unsignedDivTotal(two).getValue(), Integer(7));
TS_ASSERT_EQUALS(two.unsignedRemTotal(zero), two);
TS_ASSERT_EQUALS(negOne.unsignedRemTotal(two), one);
BitVector b = negOne.concat(negOne);
TS_ASSERT_THROWS(b + negOne, IllegalArgumentException&);
TS_ASSERT_THROWS(negOne * b, IllegalArgumentException&);
TS_ASSERT_THROWS(b.unsignedDivTotal(negOne), IllegalArgumentException&);
TS_ASSERT_THROWS(negOne.unsignedRemTotal(b), IllegalArgumentException&);
}
void testExtendOps()
{
TS_ASSERT_EQUALS(one.zeroExtend(4), zero.concat(one));
TS_ASSERT_EQUALS(one.zeroExtend(0), one);
TS_ASSERT_EQUALS(negOne.signExtend(4), negOne.concat(negOne));
TS_ASSERT_EQUALS(one.signExtend(4), zero.concat(one));
TS_ASSERT_EQUALS(one.signExtend(0), one);
}
void testShifts()
{
TS_ASSERT_EQUALS(one.leftShift(one), two);
TS_ASSERT_EQUALS(one.leftShift(negOne), zero);
TS_ASSERT_EQUALS(one.leftShift(zero), one);
TS_ASSERT_EQUALS(two.logicalRightShift(one), one);
TS_ASSERT_EQUALS(two.logicalRightShift(negOne), zero);
TS_ASSERT_EQUALS(two.arithRightShift(one), one);
TS_ASSERT_EQUALS(negOne.arithRightShift(one), negOne);
TS_ASSERT_EQUALS(negOne.arithRightShift(negOne), negOne);
TS_ASSERT_EQUALS(two.arithRightShift(negOne), zero);
}
void testStaticHelpers()
{
TS_ASSERT_EQUALS(BitVector::mkOnes(4), negOne);
TS_ASSERT_EQUALS(BitVector::mkMinSigned(4).toSignedInteger(), Integer(-8));
TS_ASSERT_EQUALS(BitVector::mkMaxSigned(4).toSignedInteger(), Integer(7));
}
private:
BitVector zero;
BitVector one;
BitVector two;
BitVector negOne;
};
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