deffered.notify() / promise.progress() test

q-progress.js

var Q = require('q');

Q.thenResolve()
    .then(function() {
        var d = Q.defer(),
            step = 0;

        var interval = setInterval(function() {
            d.notify('step ' + ++step);
        }, 1000);

        setTimeout(function() {
            clearInterval(interval);
            d.resolve();
        }, 10000);

        return d.promise;
    })
    .then(function() {
        console.log('Done');
    })
    .progress(function(data) {
        console.log('Progress:', data);
    });

Tested with [email protected].

This will output:

$ node q-progress.js
Progress: step 1
Progress: step 2
Progress: step 3
Progress: step 4
Progress: step 5
Progress: step 6
Progress: step 7
Progress: step 8
Progress: step 9
Done

So, progress messages are bubbling through the promise chain as rejection messages do.