test_ostream.hpp

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#include <iostream>
#include <sstream>
 
#pragma once
 
template <class T>
void test_ostream(const T &t, const std::string &expected,
                  const std::string &test_name)
{
  std::stringstream ss;
  ss << t;
  if(ss.str() == expected)
    {
      std::cout << "PASS: " << test_name << "\n";
    }
  else
    {
      std::cout << "FAIL: " << test_name << ": " << ss.str()
                << "!=" << expected << "\n";
    }
}