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Copy pathtestprogrammemory.cpp
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83 lines (68 loc) · 2.35 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2024 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 "fixture.h"
#include "helpers.h"
#include "token.h"
#include "programmemory.h"
#include "vfvalue.h"
class TestProgramMemory : public TestFixture {
public:
TestProgramMemory() : TestFixture("TestProgramMemory") {}
private:
void run() override {
TEST_CASE(copyOnWrite);
}
void copyOnWrite() const {
SimpleTokenList tokenlist("1+1;");
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);
}
};
REGISTER_TEST(TestProgramMemory)