1 use js_sys::*;
2 use wasm_bindgen::JsCast;
3 use wasm_bindgen_test::*;
4 
5 #[wasm_bindgen_test]
promise_inheritance()6 fn promise_inheritance() {
7     let promise = Promise::new(&mut |_, _| ());
8     assert!(promise.is_instance_of::<Promise>());
9     assert!(promise.is_instance_of::<Object>());
10     let _: &Object = promise.as_ref();
11 }
12