1 files changed, 42 insertions, 0 deletions
diff --git a/third_party/rust/rental/tests/map.rs b/third_party/rust/rental/tests/map.rs
new file mode 100644
index 0000000000..3ef3b94810
--- /dev/null
+++ b/third_party/rust/rental/tests/map.rs
@@ -0,0 +1,42 @@
+#[macro_use]
+extern crate rental;
+
+
+pub struct Foo {
+	i: i32,
+}
+
+
+rental! {
+	mod rentals {
+		use super::*;
+
+		#[rental(map_suffix = "T")]
+		pub struct SimpleRef<T: 'static> {
+			foo: Box<Foo>,
+			fr: &'foo T,
+		}
+
+		#[rental_mut(map_suffix = "T")]
+		pub struct SimpleMut<T: 'static> {
+			foo: Box<Foo>,
+			fr: &'foo mut T,
+		}
+	}
+}
+
+
+#[test]
+fn map() {
+	let foo = Foo { i: 5 };
+	let sr = rentals::SimpleRef::new(Box::new(foo), |foo| foo);
+	let sr = sr.map(|fr| &fr.i);
+	assert_eq!(sr.rent(|ir| **ir), 5);
+
+	let foo = Foo { i: 12 };
+	let sm = rentals::SimpleMut::new(Box::new(foo), |foo| foo);
+	let sm = sm.map(|fr| &mut fr.i);
+	assert_eq!(sm.rent(|ir| **ir), 12);
+}
+
+