Mocha breakpoints using Visual Studio Code

Question

Is it possible to add breakpoints to ones Mocha tests using Visual Studio Code?

Normally when debugging code one need to configure the launch.json, setting the prog

Answer 1

in the launch.json, add 1 more configuration below

{
      "type": "node",
      "request": "launch",
      "name": "Mocha Tests",
      "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
      "args": [
        "--timeout",
        "10000",
        "${workspaceRoot}/services/*.spec.js",
        "${workspaceRoot}/*.spec.js"
      ],
      "internalConsoleOptions": "openOnSessionStart"
    },

if you need to configure node version, simply add runtimeExecutable field like this

{
      "type": "node",
      "request": "launch",
      "name": "Mocha Tests",
      "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
      "args": [
        "--timeout",
        "10000",
        "${workspaceRoot}/services/*.spec.js",
        "${workspaceRoot}/*.spec.js"
      ],
      "internalConsoleOptions": "openOnSessionStart",
      "runtimeExecutable": "${env:HOME}/.nvm/versions/node/v8.2.1/bin/node"
    },

Answer 2

Simplest solution

Add the following code to the launch.json inside the .vscode folder :

{
            "name": "Unit tests",
            "type": "node",
            "request": "launch",
            "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
            "args": [
            ],
        }

You might want however to add a timeout argument as well:

 {
            "name": "Unit tests",
            "type": "node",
            "request": "launch",
            "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
            "args": [
                "--timeout",
                "999999"
            ],
        }