How to debug jest tests with create-react-app-ts scripts

launch.json

// This took me way too long to figure out.
// Needs node 8.4.0 or greater to work (I think, based on https://github.com/nodejs/node/issues/7593#issuecomment-322966866)
// The magic sauce here is that react-scripts-ts/scripts/test.js creates an inline jest config
// that it passes through. This does things like map css files properly, so if you try to use
// jest directly then it won't work. 

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Jest Tests",
            "program": "${workspaceFolder}/node_modules/react-scripts-ts/scripts/test.js",
            "args": [
                "--env=jsdom",
                "--runInBand"
            ],
            "env": {
                "CI": "true"
            },
            "internalConsoleOptions": "openOnSessionStart"
        }
    ]
}