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": "launch",
            "name": "Run Client Side Testcase",
            "program": "${workspaceRoot}/node_modules/karma/bin/karma",
            "args": ["start"],
            "cwd": "${workspaceRoot}"
        },
        {
            "type": "node",
            "request": "launch",
            "name": "Run Server Side Testcase Mocha",
            "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
            "args": ["test/server/**/*.spec.js", "--compilers js:babel/register"],
            "cwd": "${workspaceRoot}"
        },
        {
            "type": "node",
            "request": "attach",
            "name": "Attach to Process",
            "port": 5858
        },
         {
            "type": "node",
            "request": "launch",
            "name": "Run AVA Unit Test Debug",
            "program": "${workspaceRoot}/node_modules/ava/profile.js",
            "args": [
                "${file}"
            ]
        }
    ]
}