use crate::*;
#[test]
fn empty() {
let tokens: Vec<&str> = Vec::new();
let mut input = Input::new(tokens);
let output = any()(&mut input);
assert_eq!(output, Err(Error::EndOfInput));
}
#[test]
fn success() {
let tokens = vec!["hello", "world", "hillo"];
let mut input = Input::new(tokens);
let output = any()(&mut input);
assert_eq!(output, Ok("hello"));
// Using it twice returns the second token.
let output = any()(&mut input);
assert_eq!(output, Ok("world"));
}