WebStorm, An async function or method in ES5/ES3 requires the 'Promise' constructor

Question

I try to write tests in typescript (ES6) using WebStorm IDE. E.g.:

// Imports...

describe(\'Message\', () => {
    const server = express();
    serv         


        

Answer 1

{
  "compilerOptions": {
    "module": "commonjs",
    "declaration": true,
    "noImplicitAny": false,
    "removeComments": true,
    "noLib": false,
    "allowSyntheticDefaultImports": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "es6",
    "sourceMap": true,
    "outDir": "./dist",
    "baseUrl": "./src",
    "lib": ["es2015"]
  },
  "include": [
    "src/**/*",
    "**/*.spec.ts"
  ],
  "exclude": [
    "node_modules"
  ]
}

adding "lib":["es2015"] to "compilerOptions" as per @lena's answer and Removing **/*.spec.ts from "exclude":[] and adding it to "include":[] solved it for me.