StringStream ( istringstream & ostringstream )

This is my first post here.

I would like to know that is it possible to accomplish:

I have Matrix class and two objects with rows, columns and entries set to zero. Then lets say I overload the extraction and insertion operator to take input and show output.

void test_input_output_self_consistency(size_t rows, size_t cols)
{
    std::cout << "Test_input_output_self_consistency";
    Matrix m1(rows, cols, 0);
    Matrix m2(rows, cols, 0);
    for (size_t i = 0; i < rows; ++i)
    {
        for (size_t j = 0; j < cols; ++j)
        {
            m1(i, j) = (j * 100 + i) / 9.0;
        }
    }

    std::stringstream ss;
    ss << m1;
    ss >> m2; // checking if your operator>> can parse your own output generated by operator<< 
    assert("check output and input operator" && almostEqual(m1, m2, 1e-4));

}

I am interested here:

std::stringstream ss;
ss<<m1;
ss>>m2;

// checking if your operator>> can parse your own output generated by operator<<

Implementation for iostream >> and ostream << is simple which takes input and shows output respectively. Thanks in advance