loop over generated output rather than the expected output

[ishank-s]

if you loop over expected output and an extra element is returned from lexer tests still passes. So it should be otherway around?
I think
sol -

 var index: usize = 0;
   while (true) : (index += 1) {
        const tok = lex.next_token();
        var token = Token.illegal;
        if (tokens.len < index) {
            token = tokens[index];
        }
        try expectEqualDeep(token, tok);
        if (tok == .eof) {
            break;
        }
    }