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reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["jest","jest-snapshots","react","react-helmet","react-helmet-async","seo","unit-testing"],"created_at":"2024-12-14T15:18:55.720Z","updated_at":"2026-04-18T00:02:21.986Z","avatar_url":"https://github.com/keplersj.png","language":"TypeScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# jest-serializer-react-helmet-async\n\nJest Snapshot serializer to visualize react-helmet-async data alongside component snapshots.\n\n## Installation\n\nInstall preset using npm:\n\n```shell\nnpm install --save-dev jest-serializer-react-helmet-async\n```\n\nor yarn:\n\n```shell\nyarn add --dev jest-serializer-react-helmet-async\n```\n\n## Usage\n\nConfigure Jest to use the serializer in `jest.config.js`:\n\n```js\nmodule.exports = {\n  snapshotSerializers: [\"jest-serializer-react-helmet-async\"],\n};\n```\n\nor `package.json`:\n\n```json\n{\n  \"jest\": {\n    \"snapshotSerializers\": [\"jest-serializer-react-helmet-async\"]\n  }\n}\n```\n\n### In your tests\n\nUnlike [`jest-serializer-react-helmet`](https://github.com/keplersj/jest-serializer-react-helmet), this serializer does not automatically prepend the serialized data to the snapshots of your React components. You must add an assert for `react-helmet-async` to be serialized.\n\nYour test should like similar to the following:\n\n```js\nimport * as React from \"react\";\nimport renderer from \"react-test-renderer\";\nimport { HelmetProvider } from \"react-helmet-async\";\n\ndescribe(\"App\", () =\u003e {\n  it(\"renders as expected\", () =\u003e {\n    const context = {};\n    const tree = renderer\n      .create(\n        \u003cHelmetProvider context={context}\u003e\n          \u003cApp /\u003e\n        \u003c/HelmetProvider\u003e\n      )\n      .toJSON();\n\n    expect(tree).toMatchSnapshot();\n    expect(context.helmet).toMatchSnapshot();\n  });\n});\n```\n\n## Related Packages\n\n- [`jest-runner-prettier`](https://github.com/keplersj/jest-runner-prettier) - Use Jest to check your codebase against `prettier`\n- [`jest-preset-gatsby`](https://github.com/keplersj/jest-preset-gatsby) - Jest preset to ease unit testing a Gatsby project\n- [`jest-serializer-json-ld-script`](https://github.com/keplersj/jest-serializer-json-ld-script) - Jest snapshot serializer to better visualize React `\u003cscript\u003e` elements containing LD+JSON data\n- [`jest-raw-loader`](https://github.com/keplersj/jest-raw-loader) - Load the raw content of files in Jest, replicating the behavior of `webpack`'s `raw-loader`\n\n## License\n\nCopyright 2019 Kepler Sticka-Jones. Licensed ISC\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkeplersj%2Fjest-serializer-react-helmet-async","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fkeplersj%2Fjest-serializer-react-helmet-async","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkeplersj%2Fjest-serializer-react-helmet-async/lists"}