add a test

salsa-2022-tests/tests/cycles.rs

@@ -0,0 +1,43 @@
+
+#![allow(warnings)]
+
+#[salsa::jar(db = Db)]
+struct Jar(MyInput, memoized_a, memoized_b);
+
+trait Db: salsa::DbWithJar<Jar> {}
+
+#[salsa::db(Jar)]
+#[derive(Default)]
+struct Database {
+    storage: salsa::Storage<Self>,
+}
+
+impl salsa::Database for Database {
+    fn salsa_runtime(&self) -> &salsa::Runtime {
+        self.storage.runtime()
+    }
+}
+
+impl Db for Database {}
+
+#[salsa::tracked(jar = Jar)]
+struct MyInput {
+
+}
+
+#[salsa::tracked(jar = Jar)]
+fn memoized_a(db: &dyn Db, input: MyInput) -> () {
+    memoized_b(db, input)
+}
+
+#[salsa::tracked(jar = Jar)]
+fn memoized_b(db: &dyn Db, input: MyInput) -> () {
+    memoized_a(db, input)
+}
+
+#[test]
+fn execute() {
+    let mut db = Database::default();
+    let input = MyInput::new(&mut db);
+    memoized_a(&db, input);
+}