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Is your feature request related to a problem? Please describe.
When updating typescript package update from 5.5.4 to 5.6.2. (#10199) npm run test command failed with following error.
Jest encountered an unexpected token
SyntaxError: Unexpected token 'export'
Error Details
FAIL modern/src/helper.test.ts
Test suite failed to run
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:
C:\Projects\docfx\templates\node_modules\lit-html\node\lit-html.js:134
export { si as _$LH, ke as html, Se as mathml, R as noChange, D as nothing, Q as render, Oe as svg };
^^^^^^
SyntaxError: Unexpected token 'export'
2 | // The .NET Foundation licenses this file to you under the MIT license.
3 |
> 4 | import { html, TemplateResult } from 'lit-html'
| ^
5 | import { DocfxOptions } from './options'
6 |
7 | export async function options(): Promise<DocfxOptions> {
at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1505:14)
at Object.<anonymous> (modern/src/helper.ts:4:1)
at Object.<anonymous> (modern/src/helper.test.ts:4:1)
Describe the solution you'd like
Resolve errors and jest tests are successfully complete.
Additional context
This error seems to be occurred by behavior changes of TypeScript 4.6.2.
Is your feature request related to a problem? Please describe.
When updating typescript package update from
5.5.4
to5.6.2
. (#10199)npm run test
command failed with following error.Error Details
FAIL modern/src/helper.test.ts Test suite failed to runDescribe the solution you'd like
Resolve errors and jest tests are successfully complete.
Additional context
This error seems to be occurred by behavior changes of TypeScript
4.6.2
.https://github.com/kulshekhar/ts-jest/issues/4561
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