fluent-syntax 0.1.1

Parser/Serializer tools for Fluent Syntax.
Documentation 
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extern crate fluent_syntax;

use self::fluent_syntax::parser::stream::ParserStream;

#[test]
fn next() {
    let mut ps = ParserStream::new("abcd".chars());

    assert_eq!(Some('a'), ps.current());
    assert_eq!(0, ps.get_index());

    assert_eq!(Some('b'), ps.next());
    assert_eq!(Some('b'), ps.current());
    assert_eq!(1, ps.get_index());

    assert_eq!(Some('c'), ps.next());
    assert_eq!(Some('c'), ps.current());
    assert_eq!(2, ps.get_index());

    assert_eq!(Some('d'), ps.next());
    assert_eq!(Some('d'), ps.current());
    assert_eq!(3, ps.get_index());

    assert_eq!(None, ps.next());
    assert_eq!(None, ps.current());
    assert_eq!(4, ps.get_index());
}

#[test]
fn peek() {
    let mut ps = ParserStream::new("abcd".chars());

    assert_eq!(Some('a'), ps.current_peek());
    assert_eq!(0, ps.get_peek_index());

    assert_eq!(Some('b'), ps.peek());
    assert_eq!(Some('b'), ps.current_peek());
    assert_eq!(1, ps.get_peek_index());

    assert_eq!(Some('c'), ps.peek());
    assert_eq!(Some('c'), ps.current_peek());
    assert_eq!(2, ps.get_peek_index());

    assert_eq!(Some('d'), ps.peek());
    assert_eq!(Some('d'), ps.current_peek());
    assert_eq!(3, ps.get_peek_index());

    assert_eq!(None, ps.peek());
    assert_eq!(None, ps.current_peek());
    assert_eq!(4, ps.get_peek_index());
}

#[test]
fn peek_and_next() {
    let mut ps = ParserStream::new("abcd".chars());

    assert_eq!(Some('b'), ps.peek());
    assert_eq!(1, ps.get_peek_index());
    assert_eq!(0, ps.get_index());

    assert_eq!(Some('b'), ps.next());
    assert_eq!(1, ps.get_peek_index());
    assert_eq!(1, ps.get_index());

    assert_eq!(Some('c'), ps.peek());
    assert_eq!(2, ps.get_peek_index());
    assert_eq!(1, ps.get_index());

    assert_eq!(Some('c'), ps.next());
    assert_eq!(2, ps.get_peek_index());
    assert_eq!(2, ps.get_index());
    assert_eq!(Some('c'), ps.current());
    assert_eq!(Some('c'), ps.current_peek());

    assert_eq!(Some('d'), ps.peek());
    assert_eq!(3, ps.get_peek_index());
    assert_eq!(2, ps.get_index());

    assert_eq!(Some('d'), ps.next());
    assert_eq!(3, ps.get_peek_index());
    assert_eq!(3, ps.get_index());
    assert_eq!(Some('d'), ps.current());
    assert_eq!(Some('d'), ps.current_peek());

    assert_eq!(None, ps.peek());
    assert_eq!(4, ps.get_peek_index());
    assert_eq!(3, ps.get_index());
    assert_eq!(Some('d'), ps.current());
    assert_eq!(None, ps.current_peek());

    assert_eq!(None, ps.peek());
    assert_eq!(4, ps.get_peek_index());
    assert_eq!(3, ps.get_index());

    assert_eq!(None, ps.next());
    assert_eq!(4, ps.get_peek_index());
    assert_eq!(4, ps.get_index());
}

#[test]
fn skip_to_peek() {
    let mut ps = ParserStream::new("abcd".chars());

    ps.peek();
    ps.peek();

    ps.skip_to_peek();

    assert_eq!(Some('c'), ps.current());
    assert_eq!(Some('c'), ps.current_peek());
    assert_eq!(2, ps.get_peek_index());
    assert_eq!(2, ps.get_index());

    ps.peek();

    assert_eq!(Some('c'), ps.current());
    assert_eq!(Some('d'), ps.current_peek());
    assert_eq!(3, ps.get_peek_index());
    assert_eq!(2, ps.get_index());

    ps.next();

    assert_eq!(Some('d'), ps.current());
    assert_eq!(Some('d'), ps.current_peek());
    assert_eq!(3, ps.get_peek_index());
    assert_eq!(3, ps.get_index());
}

#[test]
fn reset_peek() {
    let mut ps = ParserStream::new("abcd".chars());

    ps.next();
    ps.peek();
    ps.peek();
    ps.reset_peek(None);

    assert_eq!(Some('b'), ps.current());
    assert_eq!(Some('b'), ps.current_peek());
    assert_eq!(1, ps.get_peek_index());
    assert_eq!(1, ps.get_index());

    ps.peek();

    assert_eq!(Some('b'), ps.current());
    assert_eq!(Some('c'), ps.current_peek());
    assert_eq!(2, ps.get_peek_index());
    assert_eq!(1, ps.get_index());

    ps.peek();
    ps.peek();
    ps.peek();
    ps.reset_peek(None);

    assert_eq!(Some('b'), ps.current());
    assert_eq!(Some('b'), ps.current_peek());
    assert_eq!(1, ps.get_peek_index());
    assert_eq!(1, ps.get_index());

    assert_eq!(Some('c'), ps.peek());
    assert_eq!(Some('b'), ps.current());
    assert_eq!(Some('c'), ps.current_peek());
    assert_eq!(2, ps.get_peek_index());
    assert_eq!(1, ps.get_index());

    assert_eq!(Some('d'), ps.peek());
    assert_eq!(None, ps.peek());
}

#[test]
fn peek_char_is() {
    let mut ps = ParserStream::new("abcd".chars());

    ps.next();
    ps.peek();

    assert_eq!(ps.peek_char_is('d'), true);

    assert_eq!(Some('b'), ps.current());
    assert_eq!(Some('c'), ps.current_peek());

    ps.skip_to_peek();

    assert_eq!(Some('c'), ps.current());
}