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/********************* */
/*! \file strings_rewriter_white.h
** \verbatim
** Top contributors (to current version):
** Andres Noetzli
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 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 Unit tests for the strings rewriter
**
** Unit tests for the strings rewriter.
**/
#include <cxxtest/TestSuite.h>
#include <iostream>
#include <memory>
#include <vector>
#include "expr/node.h"
#include "expr/node_manager.h"
#include "smt/smt_engine.h"
#include "smt/smt_engine_scope.h"
#include "theory/rewriter.h"
#include "theory/strings/strings_rewriter.h"
using namespace CVC4;
using namespace CVC4::kind;
using namespace CVC4::smt;
using namespace CVC4::theory;
using namespace CVC4::theory::strings;
class StringsRewriterWhite : public CxxTest::TestSuite
{
public:
StringsRewriterWhite() {}
void setUp() override
{
Options opts;
opts.setOutputLanguage(language::output::LANG_SMTLIB_V2);
d_em = new ExprManager;
d_nm = NodeManager::fromExprManager(d_em);
d_smt = new SmtEngine(d_nm, &opts);
d_scope = new SmtScope(d_smt);
d_smt->finishInit();
}
void tearDown() override
{
delete d_scope;
delete d_smt;
delete d_em;
}
void testRewriteLeq()
{
TypeNode intType = d_nm->integerType();
TypeNode strType = d_nm->stringType();
Node a = d_nm->mkConst(::CVC4::String("A"));
Node bc = d_nm->mkConst(::CVC4::String("BC"));
Node x = d_nm->mkVar("x", strType);
Node y = d_nm->mkVar("y", strType);
Node ax = d_nm->mkNode(STRING_CONCAT, a, x);
Node bcy = d_nm->mkNode(STRING_CONCAT, bc, y);
{
Node leq = d_nm->mkNode(STRING_LEQ, ax, bcy);
TS_ASSERT_EQUALS(Rewriter::rewrite(leq), d_nm->mkConst(true));
}
{
Node leq = d_nm->mkNode(STRING_LEQ, bcy, ax);
TS_ASSERT_EQUALS(Rewriter::rewrite(leq), d_nm->mkConst(false));
}
}
private:
ExprManager* d_em;
SmtEngine* d_smt;
SmtScope* d_scope;
NodeManager* d_nm;
};
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