rollup-jest
JSON →Rollup preprocessor for Jest that transforms files using Rollup. Current version 3.1.0, actively maintained. Allows using Rollup plugins and configuration in Jest tests, supporting ES modules. Key differentiator: integrates Rollup's bundling and plugin ecosystem into Jest's transform pipeline, enabling features like plugin injection, caching, and custom resolve behavior. Peer dependency on Rollup ^2.3.0 || ^3. Provides preset for zero-config setup. Suitable for projects already using Rollup who want to reuse rollup config in tests.
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