//test basic replacement
var greeting: string = "hello world";

greeting[0:4] = "goodnight";

assert greeting == "goodnight world", "basic replacement failed";


//test backwards string
assert greeting[::-1] == "dlrow thgindoog", "backwards string failed";


//test string weird manipulation
var numbers = "0123456789";

numbers[::-2] = "abc";

assert numbers == "01234c6b8a", "string weird manipulation failed";


print "All good";