/*

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

 * Copyright (C) 2007-2017 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 "settings.h"

#include "testsuite.h"

#include "threadexecutor.h"

#include <cstddef>

#include <map>

#include <ostream>

#include <string>

#include <utility>

class TestThreadExecutor : public TestFixture {

public:

    TestThreadExecutor() : TestFixture("TestThreadExecutor") {

    }

private:

    Settings settings;

    /**

     * 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::map<std::string, std::size_t> filemap;

        for (int i = 1; i <= files; ++i) {

            std::ostringstream oss;

            oss << "file_" << i << ".cpp";

            filemap[oss.str()] = 1;

        }

        settings.jobs = jobs;

        ThreadExecutor executor(filemap, settings, *this);

        for (std::map<std::string, std::size_t>::const_iterator i = filemap.begin(); i != filemap.end(); ++i)

            executor.addFileContent(i->first, data);

        ASSERT_EQUALS(result, executor.check());

    }

    void run() {

        LOAD_LIB_2(settings.library, "std.cfg");

        TEST_CASE(deadlock_with_many_errors);

        TEST_CASE(many_threads);

        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 << "  return 0;\n"

            << "}\n";

        check(2, 3, 3, oss.str());

    }

    void many_threads() {

        check(16, 100, 100,

              "int main()\n"

              "{\n"

              "  char *a = malloc(10);\n"

              "  return 0;\n"

              "}");

    }

    void no_errors_more_files() {

        check(2, 3, 0,

              "int main()\n"

              "{\n"

              "  return 0;\n"

              "}");

    }

    void no_errors_less_files() {

        check(2, 1, 0,

              "int main()\n"

              "{\n"

              "  return 0;\n"

              "}");

    }

    void no_errors_equal_amount_files() {

        check(2, 2, 0,

              "int main()\n"

              "{\n"

              "  return 0;\n"

              "}");

    }

    void one_error_less_files() {

        check(2, 1, 1,

              "int main()\n"

              "{\n"

              "  {char *a = malloc(10);}\n"

              "  return 0;\n"

              "}");

    }

    void one_error_several_files() {

        check(2, 20, 20,

              "int main()\n"

              "{\n"

              "  {char *a = malloc(10);}\n"

              "  return 0;\n"

              "}");

    }

};

REGISTER_TEST(TestThreadExecutor)