swap test

// swap
//
//
//

#include "string.h"
#include <cassert>

int main()
{
  {
    String str[2];
    str[0] = "one";
    str[1] = "zero";

    str[0].swap(str[1]);

    assert(str[0] == "zero");
    assert(str[0].getlength() == 4);
    assert(str[0].isclosed());

    assert(str[1] == "one");
    assert(str[1].getlength() == 3);
    assert(str[1].isclosed());
  }

  {
    String str[2];
    str[0] = "Contain nothing";
    str[1].swap(str[0]);

    assert(str[0] == "");
    assert(str[1] == "Contain nothing");
  }
  std::cout << "Completed testing string's swap method!" << std::endl;
  return 0;
}