test Any interop

src/ptr.rs

@@ -134,4 +134,15 @@ mod tests {
 		let s: String = obj.take();
 		assert_eq!(s, "some string");
 	}
+
+	#[test]
+	fn test_any() {
+		let obj = "some string".to_string();
+		to_own_ref!(obj);
+		let obj = obj.into_any();
+		let obj = obj.downcast::<usize>().unwrap_err();
+		let obj = obj.downcast::<&'static str>().unwrap_err();
+		let s: OwnRef<String> = obj.downcast().unwrap();
+		assert_eq!(*s, "some string");
+	}
 }