77 lines
1.6 KiB
Rust
77 lines
1.6 KiB
Rust
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use crate::implementation::{TestContext, TestContextImpl};
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#[salsa::query_group(MemoizedInputs)]
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pub(crate) trait MemoizedInputsContext: TestContext {
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fn max(&self) -> usize;
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#[salsa::input]
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fn input1(&self) -> usize;
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#[salsa::input]
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fn input2(&self) -> usize;
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}
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fn max(db: &dyn MemoizedInputsContext) -> usize {
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db.log().add("Max invoked");
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std::cmp::max(db.input1(), db.input2())
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}
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#[test]
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fn revalidate() {
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let db = &mut TestContextImpl::default();
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db.set_input1(0);
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db.set_input2(0);
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let v = db.max();
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assert_eq!(v, 0);
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db.assert_log(&["Max invoked"]);
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let v = db.max();
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assert_eq!(v, 0);
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db.assert_log(&[]);
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db.set_input1(44);
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db.assert_log(&[]);
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let v = db.max();
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assert_eq!(v, 44);
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db.assert_log(&["Max invoked"]);
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let v = db.max();
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assert_eq!(v, 44);
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db.assert_log(&[]);
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db.set_input1(44);
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db.assert_log(&[]);
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db.set_input2(66);
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db.assert_log(&[]);
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db.set_input1(64);
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db.assert_log(&[]);
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let v = db.max();
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assert_eq!(v, 66);
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db.assert_log(&["Max invoked"]);
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let v = db.max();
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assert_eq!(v, 66);
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db.assert_log(&[]);
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}
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/// Test that invoking `set` on an input with the same value still
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/// triggers a new revision.
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#[test]
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fn set_after_no_change() {
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let db = &mut TestContextImpl::default();
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db.set_input2(0);
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db.set_input1(44);
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let v = db.max();
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assert_eq!(v, 44);
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db.assert_log(&["Max invoked"]);
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db.set_input1(44);
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let v = db.max();
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assert_eq!(v, 44);
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db.assert_log(&["Max invoked"]);
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}
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