Using Q.promises: how to catch an async throw?

Question

I\'m using Q for promises, but when setting up some tests I discover I see way in catching async errors thrown inside a function that returns a promise.

I tried to

Answer 1

The exception in the setTimeout is not related anyhow to the promises, you have to catch that yourself using a try-catch-block.

Or you use Q.delay:

function func(){
    return Q.delay(100).then(function(){
        throw new Error("async error");
    });
}

func()
.then(console.log.bind(console, "success"))
.fail(console.log.bind(console));