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https://github.com/salsa-rs/salsa.git
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8c133e7a4d
This was an oversight before -- the current type implies that one introduce a synthetic write (and hence a new revision) from a `Frozen<DB>`! Not cool.
50 lines
1.3 KiB
Rust
50 lines
1.3 KiB
Rust
#![cfg(test)]
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use crate::implementation::DatabaseImpl;
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use crate::queries::Database;
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use salsa::Database as _Database;
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use salsa::Durability;
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#[test]
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fn memoized_twice() {
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let db = DatabaseImpl::default();
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let v1 = db.memoized();
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let v2 = db.memoized();
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assert_eq!(v1, v2);
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}
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#[test]
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fn volatile_twice() {
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let mut db = DatabaseImpl::default();
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let v1 = db.volatile();
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let v2 = db.volatile(); // volatiles are cached, so 2nd read returns the same
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assert_eq!(v1, v2);
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db.salsa_runtime_mut().synthetic_write(Durability::LOW); // clears volatile caches
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let v3 = db.volatile(); // will re-increment the counter
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let v4 = db.volatile(); // second call will be cached
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assert_eq!(v1 + 1, v3);
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assert_eq!(v3, v4);
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}
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#[test]
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fn intermingled() {
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let mut db = DatabaseImpl::default();
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let v1 = db.volatile();
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let v2 = db.memoized();
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let v3 = db.volatile(); // cached
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let v4 = db.memoized(); // cached
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assert_eq!(v1, v2);
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assert_eq!(v1, v3);
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assert_eq!(v2, v4);
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db.salsa_runtime_mut().synthetic_write(Durability::LOW); // clears volatile caches
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let v5 = db.memoized(); // re-executes volatile, caches new result
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let v6 = db.memoized(); // re-use cached result
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assert_eq!(v4 + 1, v5);
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assert_eq!(v5, v6);
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}
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