mocha和ts节点UnhandledPromiseRejectionWarning：TypeError：无法将未定义或null转换为对象

Question

我正在尝试用Mocha设置ts节点，但是测试脚本始终失败。

我尝试过

mocha --require ts-node/register --extensions ts,tsx --watch --watch-files src 'src/**/*.spec.{ts,tsx}'

和

mocha --require ts-node/register src/**/*.spec.ts

我也尝试在本地和全局安装ts-node，但始终是输出

> [email protected] test /home/moamen/foo/baz
> mocha --require ts-node/register src/**/*.spec.ts

(node:48106) UnhandledPromiseRejectionWarning: TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Object.help (/home/moamen/foo/baz/node_modules/yargs/lib/usage.js:240:22)
    at Object.self.showHelp (/home/moamen/foo/baz/node_modules/yargs/lib/usage.js:432:15)
    at Array.<anonymous> (/home/moamen/foo/baz/node_modules/mocha/lib/cli/cli.js:53:13)
    at Object.fail (/home/moamen/foo/baz/node_modules/yargs/lib/usage.js:41:17)
    at /home/moamen/foo/baz/node_modules/yargs/lib/command.js:246:36
(Use `node --trace-warnings ...` to show where the warning was created)
(node:48106) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:48106) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

这是我的tsconfig.json

{
    "compilerOptions": {
        "target": "es6" ,
        "module": "commonjs",
        "sourceMap": true ,
        "outDir": "dist" ,
        "strict": true ,
        "moduleResolution": "node" ,
        "esModuleInterop": true 
        },
    "lib": ["es2015"]
}

Answer 1

我有一个非常相似的问题。我的错误是在打字稿测试助手中，该助手未编译，并且导致ts-node很早就失败了

Answer 2

看到此示例后https://github.com/mochajs/mocha-examples/tree/master/packages/typescript。问题是我在全球安装了打字稿。这不应该是一个问题，但它是。