Function testOperatorStream

Tests/CMakeLib/testString.cxx:512–519

}

static bool testOperatorStream()
{
  std::cout << "testOperatorStream()\n";
  std::ostringstream ss;
  ss << "a" << cm::String("b") << 'c';
  ASSERT_TRUE(ss.str() == "abc");
  return true;
}

static bool testOperatorStdStringPlusEqual()
{