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": "debug unit test",
            "program": "${workspaceRoot}/node_modules/jest/bin/jest.js",
            "args": ["-i", "${file}"],
            // "preLaunchTask": "tsc: build - tsconfig.json"
        },
        {
            "type": "node",
            "request": "launch",
            "name": "debug perf test",
            "program": "${file}",
            // "preLaunchTask": "tsc: build - tsconfig.json"
        }
    ]
}