dlib C++ Library - sliding_buffer.cpp

// Copyright (C) 2004 Davis E. King (davis@dlib.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_TEST(test.size() == 0);
 test.set_size(3);
 buf test2;
 DLIB_TEST(test.size() == 8);
 for (int g = 0; g < 2; ++g)
 {
 test.clear();
 DLIB_TEST(test.size() == 0);
 test.set_size(2);
 DLIB_TEST(test.size() == 4);
 test[0] = 'a';
 test[1] = 's';
 test[2] = 'd';
 test[3] = 'f';
 unsigned long id = test.get_element_id(2);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 'a');
 DLIB_TEST(test[1] == 's');
 DLIB_TEST(test[2] == 'd');
 DLIB_TEST(test[3] == 'f');
 DLIB_TEST(test2.size() == 0);
 swap(test,test2);
 DLIB_TEST(test2.size() == 4);
 DLIB_TEST(test2[0] == 'a');
 DLIB_TEST(test2[1] == 's');
 DLIB_TEST(test2[2] == 'd');
 DLIB_TEST(test2[3] == 'f');
 swap(test,test2);
 test.rotate_left(4);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 'a');
 DLIB_TEST(test[1] == 's');
 DLIB_TEST(test[2] == 'd');
 DLIB_TEST(test[3] == 'f');
 test.rotate_right(1);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 's');
 DLIB_TEST(test[1] == 'd');
 DLIB_TEST(test[2] == 'f');
 DLIB_TEST(test[3] == 'a'); 
 test.rotate_left(1);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 'a');
 DLIB_TEST(test[1] == 's');
 DLIB_TEST(test[2] == 'd');
 DLIB_TEST(test[3] == 'f');
 test.rotate_left(16);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 'a');
 DLIB_TEST(test[1] == 's');
 DLIB_TEST(test[2] == 'd');
 DLIB_TEST(test[3] == 'f');
 test.rotate_left(2);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 'd');
 DLIB_TEST(test[1] == 'f');
 DLIB_TEST(test[2] == 'a');
 DLIB_TEST(test[3] == 's');
 test.rotate_left(1);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 's');
 DLIB_TEST(test[1] == 'd');
 DLIB_TEST(test[2] == 'f');
 DLIB_TEST(test[3] == 'a');
 test.rotate_left(1);
 DLIB_TEST(test[test.get_element_index(id)] == 'd');
 DLIB_TEST(test[0] == 'a');
 DLIB_TEST(test[1] == 's');
 DLIB_TEST(test[2] == 'd');
 DLIB_TEST(test[3] == 'f');
 DLIB_TEST(test.size() == 4);
 test[0] = 'x';
 DLIB_TEST(test[0] == 'x');
 DLIB_TEST(test[1] == 's');
 DLIB_TEST(test[2] == 'd');
 DLIB_TEST(test[3] == 'f');
 test.rotate_left(1);
 DLIB_TEST_MSG(test[0] == 'f',test[0]);
 DLIB_TEST(test[1] == 'x');
 DLIB_TEST(test[2] == 's');
 DLIB_TEST(test[3] == 'd');
 test[0] = 'x';
 DLIB_TEST(test[0] == 'x');
 DLIB_TEST(test[1] == 'x');
 DLIB_TEST(test[2] == 's');
 DLIB_TEST(test[3] == 'd');
 test.rotate_left(1);
 DLIB_TEST(test[0] == 'd');
 DLIB_TEST(test[1] == 'x');
 DLIB_TEST(test[2] == 'x');
 DLIB_TEST(test[3] == 's');
 DLIB_TEST(test.at_start() == true);
 DLIB_TEST(test.current_element_valid() == false);
 DLIB_TEST(test.move_next() == true);
 DLIB_TEST(test.at_start() == false);
 DLIB_TEST(test.current_element_valid() == true);
 test.clear();
 test2.clear();
 DLIB_TEST(test.size() == 0);
 DLIB_TEST(test.at_start() == true);
 DLIB_TEST(test.current_element_valid() == false);
 DLIB_TEST(test.move_next() == false);
 DLIB_TEST(test.at_start() == false);
 DLIB_TEST(test.current_element_valid() == false);
 swap(test,test2);
 DLIB_TEST(test2.at_start() == false);
 DLIB_TEST(test2.current_element_valid() == false);
 DLIB_TEST(test2.move_next() == false);
 DLIB_TEST(test2.at_start() == false);
 DLIB_TEST(test2.current_element_valid() == false);
 DLIB_TEST(test.at_start() == true);
 DLIB_TEST(test.current_element_valid() == false);
 DLIB_TEST(test.move_next() == false);
 DLIB_TEST(test.at_start() == false);
 test.set_size(3);
 DLIB_TEST(test.size() == 8);
 DLIB_TEST(test.at_start() == true);
 DLIB_TEST(test.current_element_valid() == false);
 DLIB_TEST(test.move_next() == true);
 DLIB_TEST(test.at_start() == false);
 DLIB_TEST(test.current_element_valid() == true);
 test.reset();
 DLIB_TEST(test.size() == 8);
 DLIB_TEST(test.at_start() == true);
 DLIB_TEST(test.current_element_valid() == false);
 DLIB_TEST(test.move_next() == true);
 DLIB_TEST(test.at_start() == false);
 DLIB_TEST(test.current_element_valid() == true);
 test.rotate_right(1);
 DLIB_TEST(test.size() == 8);
 DLIB_TEST(test.at_start() == true);
 DLIB_TEST(test.current_element_valid() == false);
 DLIB_TEST(test.move_next() == true);
 DLIB_TEST(test.at_start() == false);
 DLIB_TEST(test.current_element_valid() == true);
 test.rotate_left(1);
 DLIB_TEST(test.size() == 8);
 DLIB_TEST(test.at_start() == true);
 DLIB_TEST(test.current_element_valid() == false);
 DLIB_TEST(test.move_next() == true);
 DLIB_TEST(test.at_start() == false);
 DLIB_TEST(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_TEST(test.element() == count);
 ++count;
 }
 DLIB_TEST(count == test.size());
 test2.clear();
 ostringstream sout;
 istringstream sin;
 serialize(test,sout);
 sin.str(sout.str());
 deserialize(test2,sin);
 char ch;
 sin >> ch;
 DLIB_TEST( !sin);
 DLIB_TEST(test2.size() == test.size());
 for (unsigned long i = 0; i < test.size(); ++i)
 {
 DLIB_TEST_MSG(test[i] == test2[i],
 "\ni: " << i <<
 "\ntest[i]: " << test[i] <<
 "\ntest2[i]: " << test2[i]);
 }
 count = 0;
 while (test.move_next() && test2.move_next())
 {
 DLIB_TEST(test.element() == count);
 DLIB_TEST(test2.element() == count);
 ++count;
 }
 DLIB_TEST(test2.size() == count);
 DLIB_TEST(test.size() == count);
 test2.clear();
 } // for (int g = 0; g < 2; ++g)
 }
 void test_circular_buffer()
 {
 circular_buffer<int> buf;
 DLIB_TEST(buf.size() == 0);
 buf.assign(4, 0);
 DLIB_TEST(buf.size() == 4);
 DLIB_TEST(buf[0] == 0);
 DLIB_TEST(buf[1] == 0);
 DLIB_TEST(buf[2] == 0);
 DLIB_TEST(buf[3] == 0);
 buf.push_back(1);
 DLIB_TEST(buf[0] == 0);
 DLIB_TEST(buf[1] == 0);
 DLIB_TEST(buf[2] == 0);
 DLIB_TEST(buf[3] == 1);
 buf.push_back(2);
 DLIB_TEST(buf[0] == 0);
 DLIB_TEST(buf[1] == 0);
 DLIB_TEST(buf[2] == 1);
 DLIB_TEST(buf[3] == 2);
 buf.push_front(3);
 DLIB_TEST(buf[0] == 3);
 DLIB_TEST(buf[1] == 0);
 DLIB_TEST(buf[2] == 0);
 DLIB_TEST(buf[3] == 1);
 buf.push_front(4);
 DLIB_TEST(buf.front() == 4);
 DLIB_TEST(buf[0] == 4);
 DLIB_TEST(buf[1] == 3);
 DLIB_TEST(buf[2] == 0);
 DLIB_TEST(buf[3] == 0);
 buf.assign(4, 5);
 DLIB_TEST(buf[0] == 5);
 DLIB_TEST(buf[1] == 5);
 DLIB_TEST(buf[2] == 5);
 DLIB_TEST(buf[3] == 5);
 buf.push_back(3);
 DLIB_TEST(buf[0] == 5);
 DLIB_TEST(buf[1] == 5);
 DLIB_TEST(buf[2] == 5);
 DLIB_TEST(buf[3] == 3);
 buf.push_back(2);
 DLIB_TEST(buf[0] == 5);
 DLIB_TEST(buf[1] == 5);
 DLIB_TEST(buf[2] == 3);
 DLIB_TEST(buf[3] == 2);
 buf.push_back(1);
 DLIB_TEST(buf[0] == 5);
 DLIB_TEST(buf[1] == 3);
 DLIB_TEST(buf[2] == 2);
 DLIB_TEST(buf[3] == 1);
 buf.push_back(0);
 DLIB_TEST(buf[0] == 3);
 DLIB_TEST(buf[1] == 2);
 DLIB_TEST(buf[2] == 1);
 DLIB_TEST(buf[3] == 0);
 buf.push_back(-1);
 DLIB_TEST(buf.back() == -1);
 DLIB_TEST(buf[0] == 2);
 DLIB_TEST(buf[1] == 1);
 DLIB_TEST(buf[2] == 0);
 DLIB_TEST(buf[3] == -1);
 buf.resize(1);
 buf[0] = 9;
 DLIB_TEST(buf.size() == 1);
 DLIB_TEST(buf[0] == 9);
 buf.push_back(1);
 DLIB_TEST(buf[0] == 1);
 buf.push_back(4);
 DLIB_TEST(buf[0] == 4);
 buf.push_front(3);
 DLIB_TEST(buf[0] == 3);
 buf.clear();
 DLIB_TEST(buf.size() == 0);
 buf.assign(3, 0);
 circular_buffer<int> buf2, buf3;
 buf.push_back(1);
 buf.push_back(2);
 ostringstream sout;
 serialize(buf, sout);
 istringstream sin(sout.str());
 deserialize(buf2, sin);
 DLIB_TEST(buf.size() == buf2.size());
 for (unsigned long i = 0; i < buf.size(); ++i)
 DLIB_TEST(buf[i] == buf2[i]);
 buf.swap(buf3);
 DLIB_TEST(buf.size() == 0);
 DLIB_TEST(buf3.size() == buf2.size());
 for (unsigned long i = 0; i < buf3.size(); ++i)
 DLIB_TEST(buf3[i] == buf2[i]);
 }
 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>();
 test_circular_buffer();
 }
 } a;
}