/*

* Cppcheck - A tool for static C/C++ code analysis

* Copyright (C) 2007-2026 Cppcheck team.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

#include "config.h"

#include "fixture.h"

#include "helpers.h"

#include "token.h"

#include "programmemory.h"

#include "utils.h"

#include "vfvalue.h"

#include <stdexcept>

class TestProgramMemory : public TestFixture {

public:

TestProgramMemory() : TestFixture("TestProgramMemory") {}

private:

void run() override {

TEST_CASE(copyOnWrite);

TEST_CASE(hasValue);

TEST_CASE(getValue);

TEST_CASE(at);

}

void copyOnWrite() const {

SimpleTokenList tokenlist("1+1;\n");

Token* tok = tokenlist.front();

const nonneg int id = 123;

tok->exprId(id);

ProgramMemory pm;

const ValueFlow::Value* v = pm.getValue(id);

ASSERT(!v);

pm.setValue(tok, ValueFlow::Value{41});

v = pm.getValue(id);

ASSERT(v);

ASSERT_EQUALS(41, v->intvalue);

// create a copy

ProgramMemory pm2 = pm;

// make sure the value was copied

v = pm2.getValue(id);

ASSERT(v);

ASSERT_EQUALS(41, v->intvalue);

// set a value in the copy to trigger copy-on-write

pm2.setValue(tok, ValueFlow::Value{42});

// make another copy and set another value

ProgramMemory pm3 = pm2;

// set a value in the copy to trigger copy-on-write

pm3.setValue(tok, ValueFlow::Value{43});

// make sure the value was set

v = pm2.getValue(id);

ASSERT(v);

ASSERT_EQUALS(42, v->intvalue);

// make sure the value was set

v = pm3.getValue(id);

ASSERT(v);

ASSERT_EQUALS(43, v->intvalue);

// make sure the original value remains unchanged

v = pm.getValue(id);

ASSERT(v);

ASSERT_EQUALS(41, v->intvalue);

}

void hasValue() const {

ProgramMemory pm;

ASSERT(!pm.hasValue(123));

}

void getValue() const {

ProgramMemory pm;

ASSERT(!pm.getValue(123));

}

void at() const {

ProgramMemory pm;

ASSERT_THROW_EQUALS(pm.at(123), std::out_of_range, "ProgramMemory::at");

ASSERT_THROW_EQUALS(utils::as_const(pm).at(123), std::out_of_range, "ProgramMemory::at");

}

};

REGISTER_TEST(TestProgramMemory)