jest-mongodb-downloader

DEPRECATION NOTE

We no longer need this -- there’s a MUCH easier workaround:

1. If you rely on the default MongoDB version anyways -- all is fine. The MongoDB binary is downloaded on postinstall. Done!

2. To configure a different version, do not specify it in jest-mongodb-config.js, but instead in the project’s package.json. This way, postinstall will install the specified version right-away!

   "config": {
     "mongodbMemoryServer": {
       "version": "4.2.8"
     }
   }
   

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When being run, this script simply downloads the MongoDB version defined in jest-mongodb-config.js.

Why?

But jest-mongodb does this automatically upon start, so why would you want to do this? -- When explicitly triggering the download, you can make use of Docker’s caching, and avoid downloading MongoDB again and again if you just modified some source code.

Usage

1. Install with yarn add @nodepit/jest-mongodb-downloader -D

2. Add the following line to your Dockerfile before running the tests and copying the source code (make sure that jest-mongodb-config.js is already in the image).

   Add MONGOMS_DISABLE_POSTINSTALL to prevent downloading the default version of MongoDB and only install the version which is specified in the jest-mongodb-config.js.

   ENV MONGOMS_DISABLE_POSTINSTALL=1
   RUN yarn
   COPY jest-mongodb-config.js ./
   RUN yarn run jest-mongodb-downloader

3. Give a GitHub star to say “Thank you, NodePit!”

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Copyright nodepit.com, 2020.