Angular Jest Encountered An Unexpected Token, when your code or its dependencies Depending upon your setup, you might see the error on the first line of the code file or you might see it when the code tries to process JSX. 1. This happens e. The key changes are: Using @swc/jest to compile both TypeScript and JavaScript files Overriding transformIgnorePatterns (by default, Jest ignores node_modules) and, this doesn't require . The "Unexpected Token" error in Jest is a common roadblock caused by untranspiled modules in node_modules. The structure of my library look almost identical to @ngx Something might be wrong in the Nx resolver that tries to resolve the import from @sentry/angular-ivy. 3 wih jest-preset-angular 12. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not I am using jest 28. 2. Jest failed to parse a file. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not Jest encountered an unexpected token. Jest encountered an unexpected token. By configuring Babel for JavaScript/JSX/TypeScript, mocking non Jest failed to parse a file. Jest encountered an unexpected token. You're using this implicitly by extending your jest config from Nx' config. This usually means that you are trying to import a file which Jest cannot parse, e. By adjusting transformIgnorePatterns with a negative lookahead regex, AngularFix contains a large number of fixes for Angular, AngularJS, Typescript, HTML, CSS and Javascript related issues. Daily Updated! Root cause When a unit test imports a function from a module that uses ECMAScript Module (ESM) syntax, for example, import axios, { isCancel } from 'axios', which leads to Jest fail to If you Google "jest unexpected token", there are several signs that this is a really nasty issue: There are a great many threads on the issue - on It seemed to resolve the "unexpected token" issue but then I end up with a bunch of "This constructor is not compatible with Angular Dependency Injection because its dependency at index 1 Nx Angular: Jest encountered an unexpected token Asked 3 years, 9 months ago Modified 3 years, 9 months ago Viewed 867 times Jest encountered an unexpected token Jest failed to parse a file. By default, if Jest sees a Babel config, it When running unit tests using Jest, get the error as below. 3. it's not plain JavaScript. The import will then import the mocked version of the Sentry module which bypasses actually importing the Sentry package. g. Let me In this blog post, we will explore how to leverage transformIgnorePatterns effectively, providing a final fix for unexpected token errors and ensuring smooth testing experiences. mock call, the tests pass for me again. I saw it on line 1, because line 1 is almost The "Jest Encountered an Unexpected Token" error is typically a parsing issue caused by unsupported syntax or file types.
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