launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Run Tests",
            "type": "node",
            "request": "launch",
            "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
            "stopOnEntry": false,
            "args": [
                "src/**/*.test.js",
                "--require",
                "test/setup.js",
                "--compilers",
                "js:babel-register",
                "--no-timeouts",
                "--colors"
            ],
            "cwd": "${workspaceRoot}",
            "runtimeExecutable": null,
            "sourceMaps": true,
            "env": {
                "NODE_ENV": "testing"
            }
        }
    ]
}