Support for mocha "root level hooks"

[michaelnthiessen]

From this issue with the core project.

My environment is setup using Babel, as all my source and tests are written in es2015.

To be able to run my tests using mocha, I run the following command:

mocha --require ignore-styles --require babel-core/register tests/ --recursive

The module babel-core/register is required in order to transform the es2015 code. I use ignore-styles because I am using SASS in my React components (which also needs to be compiled or it throws errors).

These root-level hooks, using the --require option, are modules that are run first, before any tests are loaded (?).

I think that all that needs to be done is ensuring that these "root-level hooks" are the first files that are fed to Mocha when using it programmatically. I don't have much experience there, but that's what I've gathered from looking around a bit.

[nicojs]

Sorry for the late response. I have been thinking about this for a while. We would first need to add support for es2015 into Stryker. As of now, Stryker is not able to mutate all es2015 code (it breaks on import statements).

We'll first investigate that, before fixing this issue. Meanwhile, if anyone wants to have a go, please do so.