launch.json

{
    // Use IntelliSense to learn about possible Node.js debug 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": "attach",
            "name": "Attach by Process ID",
            "processId": "${command:PickProcess}",
            "protocol": "inspector"
        },
        {
            "name": "Debug create-react-app Tests",
            "type": "node",
            "request": "launch",
            "runtimeExecutable": "${workspaceRoot}/client/core/node_modules/.bin/react-scripts",
            "args": ["test", "--runInBand", "--no-cache", "--env=jsdom"],
            "cwd": "${workspaceRoot}/client/core",
            "protocol": "inspector",
            "console": "integratedTerminal",
            "internalConsoleOptions": "neverOpen"
          }
    ]
}