actiondb 0.7.0

A safe and efficient unstructured text (log) parsing library.
Documentation 
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pub trait HasLengthConstraint {
    fn min_length(&self) -> Option<usize>;
    fn set_min_length(&mut self, length: Option<usize>);
    fn max_length(&self) -> Option<usize>;
    fn set_max_length(&mut self, length: Option<usize>);

    fn is_match_length_ok(&self, match_length: usize) -> bool {
        match_length > 0 && self.is_min_length_ok(match_length) &&
        self.is_max_length_ok(match_length)
    }

    fn is_min_length_ok(&self, match_length: usize) -> bool {
        match self.min_length() {
            Some(x) => match_length >= x,
            None => true,
        }
    }

    fn is_max_length_ok(&self, match_length: usize) -> bool {
        match self.max_length() {
            Some(x) => match_length <= x,
            None => true,
        }
    }
}

#[cfg(test)]
mod test {
    use parsers::HasLengthConstraint;

    struct DummyImpl {
        min_length: Option<usize>,
        max_length: Option<usize>,
    }

    impl DummyImpl {
        fn new() -> DummyImpl {
            DummyImpl::default()
        }
    }

    impl Default for DummyImpl {
        fn default() -> Self {
            DummyImpl {
                min_length: None,
                max_length: None,
            }
        }
    }

    impl HasLengthConstraint for DummyImpl {
        fn min_length(&self) -> Option<usize> {
            self.min_length
        }
        fn set_min_length(&mut self, length: Option<usize>) {
            self.min_length = length;
        }
        fn max_length(&self) -> Option<usize> {
            self.max_length
        }
        fn set_max_length(&mut self, length: Option<usize>) {
            self.max_length = length;
        }
    }

    #[test]
    fn test_given_parser_when_the_match_length_is_not_constrained_then_the_match_length_is_ok_in_every_case
        () {
        let base = DummyImpl::new();
        assert_eq!(base.is_match_length_ok(42), true);
        assert_eq!(base.is_match_length_ok(1), true);
    }

    #[test]
    fn test_given_parser_when_the_minimum_match_length_is_set_then_the_shorter_matches_are_discarded
        () {
        let mut base = DummyImpl::new();
        base.set_min_length(Some(10));
        assert_eq!(base.is_match_length_ok(42), true);
        assert_eq!(base.is_match_length_ok(1), false);
        assert_eq!(base.is_match_length_ok(9), false);
        assert_eq!(base.is_match_length_ok(10), true);
    }

    #[test]
    fn test_given_parser_when_the_maximum_match_length_is_set_then_the_longer_matches_are_discarded
        () {
        let mut base = DummyImpl::new();
        base.set_max_length(Some(10));
        assert_eq!(base.is_match_length_ok(42), false);
        assert_eq!(base.is_match_length_ok(1), true);
        assert_eq!(base.is_match_length_ok(9), true);
        assert_eq!(base.is_match_length_ok(10), true);
    }
}