cppcheck/test/testexceptionsafety.cpp

/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2010 Daniel Marjamäki and 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 "tokenize.h"
#include "checkexceptionsafety.h"
#include "testsuite.h"
#include <sstream>

extern std::ostringstream errout;

class TestExceptionSafety : public TestFixture
{
public:
    TestExceptionSafety() : TestFixture("TestExceptionSafety")
    { }

private:

    void run()
    {
        TEST_CASE(destructors);
        TEST_CASE(deallocThrow);
    }

    void check(const std::string &code)
    {
        // Clear the error buffer..
        errout.str("");

        Settings settings;
        settings.addEnabled("all");

        // Tokenize..
        Tokenizer tokenizer(&settings, this);
        std::istringstream istr(code.c_str());
        tokenizer.tokenize(istr, "test.cpp");
        tokenizer.simplifyTokenList();

        // Check char variable usage..
        CheckExceptionSafety checkExceptionSafety(&tokenizer, &settings, this);
        checkExceptionSafety.runSimplifiedChecks(&tokenizer, &settings, this);
    }

    void destructors()
    {
        check("x::~x()\n"
              "{\n"
              "    throw e;\n"
              "}\n");
        ASSERT_EQUALS("[test.cpp:3]: (error) Throwing exception in destructor\n", errout.str());
    }

    void deallocThrow()
    {
        check("int * p;\n"
              "void f(int x)\n"
              "{\n"
              "    delete p;\n"
              "    if (x)\n"
              "        throw 123;\n"
              "    p = 0;\n"
              "}\n");
        ASSERT_EQUALS("[test.cpp:6]: (error) Throwing exception in invalid state, p points at deallocated memory\n", errout.str());
    }
};

REGISTER_TEST(TestExceptionSafety)