C++ stream redirection for testing

gistfile1.cpp

// save current buffer
streambuf* coutBak = cout.rdbuf();

// setup temp stream
stringstream coutBuf;

// redirect to temp
cout.rdbuf(coutBuf.rdbuf());

// test against contents of coutBuf.str()

// reset
coutBuf.str("");

// test again

// restore stream
cout.rdbuf(coutBak);