tasks.json

{
  "version": "2.0.0",
  "tasks": [
    {
      "type": "npm",
      "script": "start",
      "problemMatcher": []
    },
    {
      "type": "npm",
      "script": "build",
      "problemMatcher": [
        "$tsc",
        "$tslint4"
      ],
      "group": {
        "kind": "build",
        "isDefault": true
      }
    },
    {
      "type": "npm",
      "script": "build:watch",
      "problemMatcher": [
        "$tsc-watch",
        "$tslint4"
      ]
    },
    {
      "type": "npm",
      "script": "test",
      "problemMatcher": [
        "$tsc",
        "$tslint4"
      ],
      "group": {
        "kind": "test",
        "isDefault": true
      }
    },
    {
      "taskName": "run + watch tests for active file",
      "type": "shell",
      "command": "npm run test:fast:watch --focus=${fileBasenameNoExtension}",
      "problemMatcher": [
        "$tsc-watch",
        "$tslint4"
      ]
    },
    {
      "taskName": "run tests for active file",
      "type": "shell",
      "command": "npm run test:fast --focus=${fileBasenameNoExtension}",
      "problemMatcher": [
        "$tsc-watch",
        "$tslint4"
      ]
    },
    {
      "type": "npm",
      "script": "test:fast:watch",
      "problemMatcher": [
        "$tsc-watch"
      ]
    },
    {
      "type": "npm",
      "script": "test:watch",
      "problemMatcher": [
        "$tsc-watch"
      ]
    }
  ]
}