treaty -


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use mockall::mock;
use treaty::{
    any::any_trait,
    effect::{blocking::Blocking, Effect, Effective, ErasedEffective},
    protocol::{
        visitor::{visit_tag, Tag, TagConst, TagKind, TagProto, VisitResult},
        AsVisitor, DynVisitor,
    },
    DynWalkerObjSafe, Flow, Walker,
};

mock! {
    pub TagVisitor<K: TagKind, E> {
        pub fn visit<'a, 'ctx>(&'a mut self, kind: K, walker: DynWalkerObjSafe<'a, 'ctx, E>) -> VisitResult;
    }
}

any_trait! {
    impl['ctx, K, E] MockTagVisitor<K, E> = [
        TagProto<K, E>,
    ] where
        K: TagKind,
        E: Effect,
}

impl<'ctx, K: TagKind, E: Effect> Tag<'ctx, K, E> for MockTagVisitor<K, E> {
    fn visit<'a: 'c, 'b: 'c, 'c>(
        &'a mut self,
        kind: K,
        walker: DynWalkerObjSafe<'b, 'ctx, E>,
    ) -> ErasedEffective<'c, VisitResult, E> {
        E::ready(self.visit(kind, walker))
    }
}

pub trait TagVisitorExt<'ctx> {
    fn visit_tag_and_done<'a, const TAG: u64, W: Walker<'ctx, Blocking>>(&'a mut self, walker: W);
}

impl<'ctx, T> TagVisitorExt<'ctx> for T
where
    T: AsVisitor<'ctx>,
{
    fn visit_tag_and_done<'a, const TAG: u64, W: Walker<'ctx, Blocking>>(&'a mut self, walker: W) {
        let result =
            visit_tag::<TagConst<TAG>, Blocking, _>(TagConst, self.as_visitor(), walker).value();

        assert_eq!(result.unwrap(), VisitResult::Control(Flow::Done));
    }
}