dlib C++ Library - sliding_buffer.cpp

    // Copyright (C) 2004  Davis E. King (davisking@users.sourceforge.net)
    // License: Boost Software License   See LICENSE.txt for the full license.

    #include <sstream>
    #include <string>
    #include <ctime>
    #include <cstdlib>

    #include <dlib/sliding_buffer.h>
    #include "tester.h"

    namespace
    {

        using namespace test;
        using namespace std;
        using namespace dlib;

        logger dlog("test.sliding_buffer");

        template <
            typename buf
            >
        void sliding_buffer_kernel_test (
        )
        /*!
            requires
                - buf is an implementation of sliding_buffer/sliding_buffer_kernel_abstract.h
                - buf is instantiated with T=unsigned char
            ensures
                - runs tests on buf for compliance with the specs
        !*/
        {

            print_spinner();

            buf test;

            DLIB_CASSERT(test.size() == 0,"");

            test.set_size(3);
            buf test2;

            DLIB_CASSERT(test.size() == 8,"");

            for (int g = 0; g < 2; ++g)
            {

                test.clear();

                DLIB_CASSERT(test.size() == 0,"");
                test.set_size(2);

                DLIB_CASSERT(test.size() == 4,"");

                test[0] = 'a';
                test[1] = 's';
                test[2] = 'd';
                test[3] = 'f';

                unsigned long id = test.get_element_id(2);
                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");

                DLIB_CASSERT(test[0] == 'a',"");
                DLIB_CASSERT(test[1] == 's',"");
                DLIB_CASSERT(test[2] == 'd',"");
                DLIB_CASSERT(test[3] == 'f',"");

                DLIB_CASSERT(test2.size() == 0,"");
                swap(test,test2);
                DLIB_CASSERT(test2.size() == 4,"");

                DLIB_CASSERT(test2[0] == 'a',"");
                DLIB_CASSERT(test2[1] == 's',"");
                DLIB_CASSERT(test2[2] == 'd',"");
                DLIB_CASSERT(test2[3] == 'f',"");

                swap(test,test2);

                test.rotate_left(4);

                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");

                DLIB_CASSERT(test[0] == 'a',"");
                DLIB_CASSERT(test[1] == 's',"");
                DLIB_CASSERT(test[2] == 'd',"");
                DLIB_CASSERT(test[3] == 'f',"");

                test.rotate_right(1);

                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");

                DLIB_CASSERT(test[0] == 's',"");
                DLIB_CASSERT(test[1] == 'd',"");
                DLIB_CASSERT(test[2] == 'f',"");
                DLIB_CASSERT(test[3] == 'a',"");

                test.rotate_left(1);

                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");
                DLIB_CASSERT(test[0] == 'a',"");
                DLIB_CASSERT(test[1] == 's',"");
                DLIB_CASSERT(test[2] == 'd',"");
                DLIB_CASSERT(test[3] == 'f',"");

                test.rotate_left(16);

                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");
                DLIB_CASSERT(test[0] == 'a',"");
                DLIB_CASSERT(test[1] == 's',"");
                DLIB_CASSERT(test[2] == 'd',"");
                DLIB_CASSERT(test[3] == 'f',"");

                test.rotate_left(2);

                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");

                DLIB_CASSERT(test[0] == 'd',"");
                DLIB_CASSERT(test[1] == 'f',"");
                DLIB_CASSERT(test[2] == 'a',"");
                DLIB_CASSERT(test[3] == 's',"");

                test.rotate_left(1);

                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");
                DLIB_CASSERT(test[0] == 's',"");
                DLIB_CASSERT(test[1] == 'd',"");
                DLIB_CASSERT(test[2] == 'f',"");
                DLIB_CASSERT(test[3] == 'a',"");

                test.rotate_left(1);

                DLIB_CASSERT(test[test.get_element_index(id)] == 'd',"");
                DLIB_CASSERT(test[0] == 'a',"");
                DLIB_CASSERT(test[1] == 's',"");
                DLIB_CASSERT(test[2] == 'd',"");
                DLIB_CASSERT(test[3] == 'f',"");

                DLIB_CASSERT(test.size() == 4,"");

                test[0] = 'x';

                DLIB_CASSERT(test[0] == 'x',"");
                DLIB_CASSERT(test[1] == 's',"");
                DLIB_CASSERT(test[2] == 'd',"");
                DLIB_CASSERT(test[3] == 'f',"");

                test.rotate_left(1);

                DLIB_CASSERT(test[0] == 'f',test[0]);
                DLIB_CASSERT(test[1] == 'x',"");
                DLIB_CASSERT(test[2] == 's',"");
                DLIB_CASSERT(test[3] == 'd',"");

                test[0] = 'x';

                DLIB_CASSERT(test[0] == 'x',"");
                DLIB_CASSERT(test[1] == 'x',"");
                DLIB_CASSERT(test[2] == 's',"");
                DLIB_CASSERT(test[3] == 'd',"");

                test.rotate_left(1);

                DLIB_CASSERT(test[0] == 'd',"");
                DLIB_CASSERT(test[1] == 'x',"");
                DLIB_CASSERT(test[2] == 'x',"");
                DLIB_CASSERT(test[3] == 's',"");

                DLIB_CASSERT(test.at_start() == true,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");
                DLIB_CASSERT(test.move_next() == true,"");
                DLIB_CASSERT(test.at_start() == false,"");
                DLIB_CASSERT(test.current_element_valid() == true,"");

                test.clear();
                test2.clear();

                DLIB_CASSERT(test.size() == 0,"");
                DLIB_CASSERT(test.at_start() == true,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");
                DLIB_CASSERT(test.move_next() == false,"");
                DLIB_CASSERT(test.at_start() == false,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");

                swap(test,test2);

                DLIB_CASSERT(test2.at_start() == false,"");
                DLIB_CASSERT(test2.current_element_valid() == false,"");
                DLIB_CASSERT(test2.move_next() == false,"");
                DLIB_CASSERT(test2.at_start() == false,"");
                DLIB_CASSERT(test2.current_element_valid() == false,"");

                DLIB_CASSERT(test.at_start() == true,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");
                DLIB_CASSERT(test.move_next() == false,"");
                DLIB_CASSERT(test.at_start() == false,"");

                test.set_size(3);
                DLIB_CASSERT(test.size() == 8,"");

                DLIB_CASSERT(test.at_start() == true,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");
                DLIB_CASSERT(test.move_next() == true,"");
                DLIB_CASSERT(test.at_start() == false,"");
                DLIB_CASSERT(test.current_element_valid() == true,"");
                test.reset();
                DLIB_CASSERT(test.size() == 8,"");
                DLIB_CASSERT(test.at_start() == true,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");
                DLIB_CASSERT(test.move_next() == true,"");
                DLIB_CASSERT(test.at_start() == false,"");
                DLIB_CASSERT(test.current_element_valid() == true,"");

                test.rotate_right(1);
                DLIB_CASSERT(test.size() == 8,"");
                DLIB_CASSERT(test.at_start() == true,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");
                DLIB_CASSERT(test.move_next() == true,"");
                DLIB_CASSERT(test.at_start() == false,"");
                DLIB_CASSERT(test.current_element_valid() == true,"");

                test.rotate_left(1);
                DLIB_CASSERT(test.size() == 8,"");
                DLIB_CASSERT(test.at_start() == true,"");
                DLIB_CASSERT(test.current_element_valid() == false,"");
                DLIB_CASSERT(test.move_next() == true,"");
                DLIB_CASSERT(test.at_start() == false,"");
                DLIB_CASSERT(test.current_element_valid() == true,"");
                test.reset();

                for (unsigned long i = 0; i < test.size(); ++i)
                {
                    test[i] = static_cast<unsigned char>(i);
                }

                unsigned long count = 0;
                while (test.move_next())
                {
                    DLIB_CASSERT(test.element() == count,"");
                    ++count;
                }

                DLIB_CASSERT(count == test.size(),"");

                test2.clear();
                ostringstream sout;
                istringstream sin;

                serialize(test,sout);
                sin.str(sout.str());
                deserialize(test2,sin);

                char ch;
                sin >> ch;
                DLIB_CASSERT( !sin, "");

                DLIB_CASSERT(test2.size() == test.size(),"");

                for (unsigned long i = 0; i < test.size(); ++i)
                {
                    DLIB_CASSERT(test[i] == test2[i],
                                 "\ni:        " << i <<
                                 "\ntest[i]:  " << test[i] <<
                                 "\ntest2[i]: " << test2[i]);
                }

                count = 0;
                while (test.move_next() && test2.move_next())
                {
                    DLIB_CASSERT(test.element() == count,"");
                    DLIB_CASSERT(test2.element() == count,"");
                    ++count;
                }

                DLIB_CASSERT(test2.size() == count,"");
                DLIB_CASSERT(test.size() == count,"");

                test2.clear();

            } // for (int g = 0; g < 2; ++g)

        }

        class sliding_buffer_tester : public tester
        {
        public:
            sliding_buffer_tester (
            ) :
                tester ("test_sliding_buffer",
                        "Runs tests on the sliding_buffer component.")
            {}

            void perform_test (
            )
            {
                dlog << LINFO << "testing kernel_1a";
                sliding_buffer_kernel_test<sliding_buffer<unsigned char>::kernel_1a>  ();
                dlog << LINFO << "testing kernel_1a_c";
                sliding_buffer_kernel_test<sliding_buffer<unsigned char>::kernel_1a_c>();
            }
        } a;

    }