How to test input and output overloaded operator in C++ Gtest

Question

I am using following example from here

Consider I have following class

#include 

class Distance {
private:
  int feet;             
  i         


        

Answer 1

Is there any way I can use EXPECT_EQ instead?

You can use a stringstream to print the results of operator<< to a string, then compare the string.

https://en.cppreference.com/w/cpp/io/basic_stringstream

TEST( Distance, Output )
{
    std::ostringstream out;
    Distance d;
    out << d;
    EXPECT_EQ( "F:0 I:0", out.str() );
}

Input test would be similar, just use std::istringtream instead.