UI Deploy

Promises are becoming a common part of the JavaScript code. The native Promise object is already supported by all the major browsers including Chrome, Firefox, and Safari.

Despite making asynchronous code simpler, dealing with promises in unit tests is a hassle. You need to wire your test’s assertions into the callbacks of the promise, which adds extra code into the test. In this way the test itself becomes a bit complicated and it’s harder to see what’s happening.