cppcheck/test/testthreadexecutor.cpp

/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2011 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/>.
 */


// The preprocessor that Cppcheck uses is a bit special. Instead of generating
// the code for a known configuration, it generates the code for each configuration.


#include "cppcheck.h"
#include "testsuite.h"
#include "threadexecutor.h"

#include <algorithm>
#include <map>
#include <string>
#include <stdexcept>

extern std::ostringstream errout;
extern std::ostringstream output;

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

private:

    /**
     * Execute check using n jobs for y files which are have
     * identical data, given within data.
     */
    void check(unsigned int jobs, int files, int result, const std::string &data)
    {
        errout.str("");
        output.str("");
        if (!ThreadExecutor::isEnabled())
        {
            // Skip this check on systems which don't use this feature
            return;
        }

        std::vector<std::string> filenames;
        std::map<std::string, long> filesizes;
        for (int i = 1; i <= files; ++i)
        {
            std::ostringstream oss;
            oss << "file_" << i << ".cpp";
            filenames.push_back(oss.str());
        }

        Settings settings;
        settings._jobs = jobs;
        ThreadExecutor executor(filenames, filesizes, settings, *this);
        for (unsigned int i = 0; i < filenames.size(); ++i)
            executor.addFileContent(filenames[i], data);

        ASSERT_EQUALS(result, executor.check());
    }

    void run()
    {
        TEST_CASE(deadlock_with_many_errors);
        TEST_CASE(no_errors_more_files);
        TEST_CASE(no_errors_less_files);
        TEST_CASE(no_errors_equal_amount_files);
        TEST_CASE(one_error_less_files);
        TEST_CASE(one_error_several_files);
    }

    void deadlock_with_many_errors()
    {
        std::ostringstream oss;
        oss << "int main()\n"
            << "{\n";
        for (int i = 0; i < 500; i++)
            oss << "  {char *a = malloc(10);}\n";

        oss << "}\n";
        check(2, 3, 3, oss.str());
    }

    void no_errors_more_files()
    {
        std::ostringstream oss;
        oss << "int main()\n"
            << "{\n";
        oss << "}\n";
        check(2, 3, 0, oss.str());
    }

    void no_errors_less_files()
    {
        std::ostringstream oss;
        oss << "int main()\n"
            << "{\n";
        oss << "}\n";
        check(2, 1, 0, oss.str());
    }

    void no_errors_equal_amount_files()
    {
        std::ostringstream oss;
        oss << "int main()\n"
            << "{\n";
        oss << "}\n";
        check(2, 2, 0, oss.str());
    }

    void one_error_less_files()
    {
        std::ostringstream oss;
        oss << "int main()\n"
            << "{\n";
        oss << "  {char *a = malloc(10);}\n";
        oss << "}\n";
        check(2, 1, 1, oss.str());
    }

    void one_error_several_files()
    {
        std::ostringstream oss;
        oss << "int main()\n"
            << "{\n";
        oss << "  {char *a = malloc(10);}\n";
        oss << "}\n";
        check(2, 20, 20, oss.str());
    }
};

REGISTER_TEST(TestThreadExecutor)