let strings = import "std/strings.ucg";
let asserts = import "std/testing.ucg";

let str_class = strings.ops{str="foo bar"};

assert asserts.equal{
    left = str_class.split_on{},
    right = ["foo", "bar"],
};

assert asserts.equal{
    left = strings.ops{str="foo"}.split_on{},
    right = ["foo"],
};

assert asserts.equal{
    left = strings.ops{str=""}.split_on{},
    right = [""],
};

assert asserts.equal{
    left = str_class.split_at(3),
    right = {left="foo", right=" bar"},
};

assert asserts.equal{
    left = str_class.len,
    right = 7,
};

assert asserts.equal{
    left = str_class.substr{start=1},
    right = "oo bar",
};

assert asserts.equal{
    left = str_class.substr{end=5},
    right = "foo ba",
};

assert asserts.equal{
    left = str_class.substr{end=8},
    right = "foo bar",
};