print( "testing length" );
foreach str in { "", "1234", "1" }
  print( "testing '" + str + "' length: " + len( str ) );
  if ( len( str ) != str.length() )
    print( "failed size " + len( str ) + "!=" + str.length() );
  endif
endforeach

print( "\ntesting join" );
var str := ",";
var arr := { 1, "2", 3.1, 4, 5 };
arr[10] := "test";
var res := str.join( arr );
print( str );
print( res );
print( "\none " + "test".join( { 1 } ) );

print( "\nemptytest '" + "empty".join( {} ) + "'" );

print( "\ntesting upper" );
str := "asbcxysd";
var orig := str;
var up := str.upper();
print( up );
print( "\ntesting lower" );
print( up.lower() );
if ( up != orig )
  print( "compare failed" );
endif

print( "\ntesting find" );
str := "1234567";
print( str.find( "2", 1 ) );
print( str.find( "2", 3 ) );
print( str.find( "7" ) );
print( str.find( "1" ) );
print( str.find( "1", 1 ) );