launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "node",
      "request": "launch",
      "name": "Mocha All",
      "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
      "args": ["--timeout", "999999", "--colors", "${workspaceFolder}/test"],
      "console": "integratedTerminal",
      "internalConsoleOptions": "neverOpen"
    },
    {
      "type": "node",
      "request": "launch",
      "name": "Mocha Current File",
      "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
      "args": ["--timeout", "999999", "--colors", "${file}"],
      "console": "integratedTerminal",
      "internalConsoleOptions": "neverOpen"
    }
  ]
}