launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Unit tests",
            "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
            "args": [
                "--require",
                "@babel/register",
                "--colors",
                "${workspaceFolder}/test/specs/*",
                "--sort",
            ],
            "internalConsoleOptions": "openOnSessionStart"
        }
    ]
}