1 use js_sys::*; 2 use wasm_bindgen::JsCast; 3 use wasm_bindgen_test::*; 4 5 #[wasm_bindgen_test] promise_inheritance()6fn 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