launch.json

// A launch configuration that compiles the extension and then opens it inside a new window
{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Run",
      "type": "extensionHost",
      "request": "launch",
      "args": ["--extensionDevelopmentPath=${workspaceFolder}"],
      "outFiles": ["${workspaceFolder}/dist/**/*.js"],
      "preLaunchTask": "${defaultBuildTask}"
    },
    {
      "name": "Tests",
      "type": "extensionHost",
      "request": "launch",
      "args": [
        "--extensionDevelopmentPath=${workspaceFolder}",
        "--extensionTestsPath=${workspaceFolder}/lib/test/suite/index"
      ],
      "env": {
        "NO_TEST_TIMEOUT": "true"
      },
      "outFiles": [
        "${workspaceFolder}/lib/**/*.js",
        "${workspaceFolder}/dist/**/*.js"
      ],
      "preLaunchTask": "tasks: watch-tests"
    },
    {
      "name": "Slow Tests",
      "type": "extensionHost",
      "request": "launch",
      "args": [
        "--extensionDevelopmentPath=${workspaceFolder}",
        "--extensionTestsPath=${workspaceFolder}/lib/test/suite/index"
      ],
      "env": {
        "NO_TEST_TIMEOUT": "true",
        "TEST_CONTEXT": "slow"
      },
      "outFiles": [
        "${workspaceFolder}/lib/**/*.js",
        "${workspaceFolder}/dist/**/*.js"
      ],
      "preLaunchTask": "tasks: watch-tests"
    }
  ]
}