Help us understand the problem. What is going on with this article?

asyncを使用したコードをjestでテストすると「regeneratorRuntime is not defined」エラーが発生

確認環境

  • Node.js: 10.16.0
  • Jest: 24.9.0
  • @babel/core: 7.7.5

エラー内容

jestでテスト実行すると、asyncの記述の部分で、以下のようなエラーが発生しました。

    ReferenceError: regeneratorRuntime is not defined

       9 | }
      10 | 
    > 11 | const main = async () => {
         |              ^

対応

.babelrcにて、babelのターゲットを指定することで解決しました。
変更前:

.babelrc
{
  "presets": [
    "@babel/preset-env"
  ]
}

変更後:

.babelrc
{
  "presets": [
    [
      "@babel/preset-env", {
        "targets": {
          "node": "current"
        }
      }
    ]
  ]
}

以上。

Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
Comments
No comments
Sign up for free and join this conversation.
If you already have a Qiita account
Why do not you register as a user and use Qiita more conveniently?
You need to log in to use this function. Qiita can be used more conveniently after logging in.
You seem to be reading articles frequently this month. Qiita can be used more conveniently after logging in.
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
ユーザーは見つかりませんでした