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/******************************************************************************
* Top contributors (to current version):
* Aina Niemetz, Andres Noetzli, Andrew Reynolds
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2025 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.
* ****************************************************************************
*
* Black box testing of the skolem cache of the theory of strings.
*/
#include <memory>
#include "expr/node.h"
#include "test_smt.h"
#include "theory/strings/skolem_cache.h"
#include "util/rational.h"
#include "util/string.h"
using namespace cvc5::internal::theory::strings;
namespace cvc5::internal {
namespace test {
class TestTheoryBlackStringsSkolemCache : public TestSmt
{
};
TEST_F(TestTheoryBlackStringsSkolemCache, mkSkolemCached)
{
Node zero = d_nodeManager->mkConstInt(Rational(0));
Node n = d_skolemManager->mkDummySkolem("n", d_nodeManager->integerType());
Node a = d_skolemManager->mkDummySkolem("a", d_nodeManager->stringType());
Node b = d_skolemManager->mkDummySkolem("b", d_nodeManager->stringType());
Node c = d_skolemManager->mkDummySkolem("c", d_nodeManager->stringType());
Node d = d_skolemManager->mkDummySkolem("d", d_nodeManager->stringType());
Node sa = d_nodeManager->mkNode(
Kind::STRING_SUBSTR,
a,
zero,
d_nodeManager->mkNode(Kind::STRING_INDEXOF, a, b, zero));
Node sc = d_nodeManager->mkNode(Kind::STRING_SUBSTR, c, zero, n);
SkolemCache sk(d_nodeManager.get(), nullptr);
// Check that skolems are shared between:
//
// SK_FIRST_CTN(a, b)
//
// SK_FIRST_CTN(a, b)
{
Node s1 = sk.mkSkolemCached(a, b, SkolemCache::SK_FIRST_CTN_PRE, "foo");
Node s2 = sk.mkSkolemCached(a, b, SkolemCache::SK_FIRST_CTN_PRE, "foo");
ASSERT_EQ(s1, s2);
}
}
} // namespace test
} // namespace cvc5::internal
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