tswaters

Stubbing Classes and their Constructors in Native ES6

It's getting to that point. All the major evergreen browsers have (mostly) functional class keyword. But what does this mean for unit tests and the ability to stub constructors? In short, the answer is 'no'.

Many will tell you that es6 classes are just sugar coated es5 functions with prototypal inheritance setup. Mostly true - but there are two considerations that make testing more difficult:

• super is a magical keyword that calls the same method on the parent class. in cases with methods, easy enough to stub those, sinon.stub(parent.prototype, 'whatever') -- for super itself, there is no way to stub out the constructor call... normally not a huge deal, but...

• classes are not added to the global scope. where once you could call sinon.stub(global, 'SomeFunction'), sinon.stub(global, 'SomeClass') (or under window in the browser), this will throw an error.

SKempin

Git Subtree Basics

If you hate git submodule, then you may want to give git subtree a try.

Background

When you want to use a subtree, you add the subtree to an existing repository where the subtree is a reference to another repository url and branch/tag. This add command adds all the code and files into the main repository locally; it's not just a reference to a remote repo.

When you stage and commit files for the main repo, it will add all of the remote files in the same operation. The subtree checkout will pull all the files in one pass, so there is no need to try and connect to another repo to get the portion of subtree files, because they were already included in the main repo.

Adding a subtree

Let's say you already have a git repository with at least one commit. You can add another repository into this respository like this: