regression: attempting to construct `DurableObjectState` in jest test causes parse error

Attempting to construct an instance of DurableObjectState inside a jest test in a project using typescript fails with the following error:

    Jest encountered an unexpected token

    Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.

    Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.

    By default "node_modules" folder is ignored by transformers.

    Here's what you can do:
     • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
     • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
     • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
     • If you need a custom transformation specify a "transform" option in your config.
     • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.

    You'll find more details and examples of these config options in the docs:
    https://jestjs.io/docs/configuration
    For information about custom transformations, see:
    https://jestjs.io/docs/code-transformation

    Details:

    /workspaces/miniflare-typescript-esbuild-jest/node_modules/undici/lib/llhttp/llhttp.wasm:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){
                                                                                      

    SyntaxError: Invalid or unexpected token

      at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1728:14)

You can see a minimal reproduction by cloning this “durable-object-state-issue” repo branch (which also has an optional devcontainer)

• https://github.com/jorroll/miniflare-typescript-esbuild-jest/tree/durable-object-state-issue

Note that this repository was created using the “Miniflare Example Project” in the cloudflare docs. At first glance, this might seem like an issue with the example project’s setup, however, unless I’m missing something, there shouldn’t be any parse errors caused by a published package (in this case the @miniflare/durable-objects package).

Previously, I think I had success manually constructing an instance of DurableObjectState in order to unit test the non-fetch methods of a DurableObject (see #157), however I cannot replicate this anymore.

[mrbbot]

Hey! 👋 You should be able to use the getMiniflareDurableObjectState() method released in 2.9.0 to construct DurableObjectStates: https://github.com/cloudflare/miniflare/releases/tag/v2.9.0.

[dan-lee]

Stumbled upon the same issue today. Unfortunately, neither transformIgnorePatterns nor `moduleNameMapper solved the issue for me.