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Support custom test runner environment variables #17902

merged 6 commits into from Aug 22, 2018


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smashwilson commented Aug 22, 2018

To generate Istanbul test coverage data for atom/github from the graphical test runner, we need to have ATOM_GITHUB_BABEL_ENV set to "coverage". This activates a Babel environment that includes "babel-plugin-istanbul" that installs instrumentation into the transpiled source. But, we can't have it set when launching Atom, because the version of atom/github that's bundled with Atom (or, in my case, installed in~/.atom/packages`) doesn't include the plugin, which is a devDependency.

We wouldn't want to activate it for the github package in the host Atom environment, anyway, because the instrumentation has a pretty significant performance cost.

I'm adding an optional parameter to WorkspaceElement::runPackageSpecs() that's eventually used to initialize the AtomWindow. I've also added some code within the test window to pick up and install the environment before running transpilers or anything from the package source.

Here's how I'm using this in my init.js:

atom.commands.add('me:run-package-specs', () => {
    env: Object.assign({}, process.env, {ATOM_GITHUB_BABEL_ENV: 'coverage'})

/cc @annthurium @kuychaco

smashwilson added some commits Aug 22, 2018

@smashwilson smashwilson merged commit cd756ea into master Aug 22, 2018

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@smashwilson smashwilson deleted the aw/custom-test-env branch Aug 22, 2018

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