Cloudflare DevelopersCD
Cloudflare Developers•3y ago
ariaxu

Trouble testing durable objects with latest wrangler and miniflare/jest in ts

Hi! I added a durable object to my worker project and it's broken my tests.

All of my tests now fail before running with DurableObjectError [ERR_CLASS_NOT_FOUND]: Class "DurableThing" for Durable Object "DURABLE_THING" not found.

I checked the compiler output and the DurableThing class is not present in the output, which explains why jest/miniflare don't see it. Doing const r = DurableThing; in my worker doesn't cause it to be included in the compiler output.

Here's my jest config from packages.json:

 "jest": {
    "preset": "ts-jest",
    "testEnvironment": "miniflare",
    "testMatch": [
      "**/*.test.ts"
    ],
    "testEnvironmentOptions": {
      "modules": true,
      "scriptPath": "dist/worker.js",
      "r2Buckets": [
        "R2_BUCKET"
      ],
      "durableObjects": {
        "DURABLE_THING": "DurableThing"
      }
    }
  }


I'm kinda new to all this; any help would be appreciated. Removing any reference to the durable object from my jest config makes non-DO tests work again.
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