As before, Sinon.JS provides utilities that help test frameworks reduce the boiler-plate. Learn more about fake time. And all the rest… You’ve seen the most common tasks people tackle …

As of Sinon 10 we stopped maintaining compatibility with legacy browsers. Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The …

sinon.spy(object) Spies all the object’s methods. Note that it’s usually better practice to spy individual methods, particularly on objects that you don’t understand or control all the methods …

As of Sinon version 1.8, you can use the onCall method to make a stub respond differently on consecutive calls. Note that in Sinon version 1.5 to version 1.7, multiple calls to the yields* and …

To make sure assertions integrate nicely with your test framework, you should customize either sinon.assert.fail or sinon.assert.failException and look into sinon.assert.expose and …

To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior

var stringOrNumber = sinon.match.string.or(sinon.match.number); var bookWithPages = sinon.match.instanceOf(Book).and(sinon.match.has("pages")); Custom matchers. Custom …

Their addressing schemes vary, but an example url such as https://cdn.jsdelivr.net/npm/sinon@3/pkg/sinon.js would download the latest browser bundle of …

In Sinon, a fake is a Function that records arguments, return value, the value of this and exception thrown (if any) for all of its calls. A fake is immutable: once created, the behavior will not change.

Fake timers are synchronous implementations of setTimeout and friends that Sinon.JS can overwrite the global functions with to allow you to more easily test code using them. It also has …