1 files changed, 39 insertions, 0 deletions
diff --git a/src/tools/rust-analyzer/crates/query-group-macro/tests/tuples.rs b/src/tools/rust-analyzer/crates/query-group-macro/tests/tuples.rs
new file mode 100644
index 00000000000..af0e852695e
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/query-group-macro/tests/tuples.rs
@@ -0,0 +1,39 @@
+use query_group_macro::query_group;
+
+mod logger_db;
+use expect_test::expect;
+use logger_db::LoggerDb;
+
+#[query_group]
+pub trait HelloWorldDatabase: salsa::Database {
+    #[salsa::input]
+    fn input_string(&self) -> String;
+
+    #[salsa::invoke_interned(length_query)]
+    fn length_query(&self, key: ()) -> (usize, usize);
+}
+
+fn length_query(db: &dyn HelloWorldDatabase, _key: ()) -> (usize, usize) {
+    let len = db.input_string().len();
+    (len, len)
+}
+
+#[test]
+fn query() {
+    let mut db = LoggerDb::default();
+
+    db.set_input_string(String::from("Hello, world!"));
+    let len = db.length_query(());
+
+    assert_eq!(len, (13, 13));
+    db.assert_logs(expect![[r#"
+        [
+            "salsa_event(WillCheckCancellation)",
+            "salsa_event(WillExecute { database_key: create_data_HelloWorldDatabase(Id(0)) })",
+            "salsa_event(WillCheckCancellation)",
+            "salsa_event(DidValidateMemoizedValue { database_key: create_data_HelloWorldDatabase(Id(0)) })",
+            "salsa_event(WillCheckCancellation)",
+            "salsa_event(WillExecute { database_key: length_query_shim(Id(800)) })",
+            "salsa_event(WillCheckCancellation)",
+        ]"#]]);
+}