Fixed testing macro bug.

Fixed a bug where the remaining tokens in the iterator were not
checked.

pest/src/macros.rs

@@ -8,11 +8,7 @@
 #[doc(hidden)]
 #[macro_export]
 macro_rules! consumes_to {
- ( $_rules:ident, $tokens:expr, [] ) => {
- let rest: Vec<_> = $tokens.map(|r| r.unwrap()).collect();
-
- assert!(rest.is_empty(), format!("expected end of stream, but found {:?}", rest));
- };
+ ( $_rules:ident, $tokens:expr, [] ) => ();
  ( $rules:ident, $tokens:expr, [ $name:ident ( $start:expr, $end:expr ) ] ) => {
  let expected = format!("expected Start {{ rule: {:?}, pos: Position {{ pos: {} }} }}",
  $rules::$name, $start);
@@ -200,11 +196,18 @@ macro_rules! parses_to {
  ( parser: $parser:ident, input: $string:expr, rule: $rules:tt :: $rule:tt,
  tokens: [ $( $names:ident $calls:tt ),* ] ) => {
 
- let input = $crate::inputs::StringInput::new($string.to_owned());
- let mut tokens = $parser::parse($rules::$rule,
- ::std::rc::Rc::new(input)).unwrap().into_iter();
+ #[allow(unused_mut)]
+ {
+ let input = $crate::inputs::StringInput::new($string.to_owned());
+ let mut tokens = $parser::parse($rules::$rule,
+ ::std::rc::Rc::new(input)).unwrap().into_iter();
+
+ consumes_to!($rules, &mut tokens, [ $( $names $calls ),* ]);
+
+ let rest: Vec<_> = tokens.collect();
 
- consumes_to!($rules, tokens, [ $( $names $calls ),* ]);
+ assert!(rest.is_empty(), format!("expected end of stream, but found {:?}", rest));
+ }
  };
 }
 
@@ -257,4 +260,30 @@ mod tests {
  ]
  };
  }
+
+ #[test]
+ #[should_panic]
+ fn missing_end() {
+ parses_to! {
+ parser: AbcParser,
+ input: "abcde",
+ rule: Rule::a,
+ tokens: [
+ a(0, 3, [
+ b(1, 2)
+ ])
+ ]
+ };
+ }
+
+ #[test]
+ #[should_panic]
+ fn empty() {
+ parses_to! {
+ parser: AbcParser,
+ input: "abcde",
+ rule: Rule::a,
+ tokens: []
+ };
+ }
 }