regression: attempting to construct `DurableObjectState` in jest test causes parse error
See original GitHub issueAttempting 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)
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.
Issue Analytics
- State:
- Created 2 years ago
- Comments:5 (1 by maintainers)
Hey! 👋 You should be able to use the
getMiniflareDurableObjectState()
method released in2.9.0
to constructDurableObjectState
s: https://github.com/cloudflare/miniflare/releases/tag/v2.9.0.Stumbled upon the same issue today. Unfortunately, neither
transformIgnorePatterns
nor `moduleNameMapper solved the issue for me.