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ava-postcss-tester [![Build Status][travis badge]][travis link] [![Coverage Status][coveralls badge]][coveralls link]\n\nTest your PostCSS plugin with AVA and this handy tool.\n\n```js\n// test.js\nimport test from 'ava';\nimport PostcssTester from 'ava-postcss-tester';\n\nconst tester = new PostcssTester({\n  postcss: require('postcss'),\n  plugin: require('.')\n});\n\ntest('test name', async t =\u003e {\n  const input = `\n    .class {\n      size: 100px;\n    }\n  `;\n  const output = `\n    .class {\n      width: 100px;\n      height: 100px;\n    }\n  `;\n  await tester.test(input, output, t);\n});\n```\n\n## Installation\n\n```console\n$ npm install -D ava-postcss-tester\n```\n\n## Usage\n\nCreate a new tester by calling `new PostcssTester` with an options object:\n\n- `postcss`: The postcss module to use for process\n- `plugin`: You PostCSS plugin to test (can be an array of plugins) \ntolerateWarnings;\n- `from`: *Optional*, default: `''`, The `from` parameter passed to \n`postcss.process`, must be a file path\n- `tolerateWarnings`: Optional, default: `false`, Ignore PostCSS warnings\n- `exactComparaison`: Optional, default: `false`, Compare the `input` and \n`output` without any trimming or line breaks cleaning\n\n```js\nimport test from 'ava';\nimport PostcssTester from 'ava-postcss-tester';\n\nconst tester = new PostcssTester({\n  postcss: require('postcss'),\n  plugin: require('.'),\n  tolerateWarnings: true\n});\n```\n\nThen you can run the async function `tester.test(input, output, t, options)``:\n\n- `input`: A string containing your css input\n- `output`: A string containing your excpected output, it can be either a CSS \nstring, an `Error` or a function receiving (error, warnings, result) letting \nyou finish the test as you would like it\n  - `error`: A string containing the Error message\n  - `warnings`: An array of PostCSS warnings, is null if there an error occured\n  - `result`: A string containing the PostCSS process result\n- `t`: The AVA test `t` object\n- `options`: *Optional*, An object containing those additional parameters:\n  - `pluginOptions`: Options passed to your plugin\n  - `pluginsBefore`: An array of plugins to load before your plugin\n  - `pluginsAfter`: An array of plugins to load after your plugin\n\n```js\ntest('test name', async t =\u003e {\n  const input = `\n    .class {\n      size: 100px;\n    }\n  `;\n  const output = `\n    .class {\n      width: 100px;\n      height: 100px;\n    }\n  `;\n  await tester.test(input, output, t, {\n    pluginOptions: {\n      sizeShorthandActivated: true\n    },\n    pluginsAfter: [require('autoprefixer')]\n  });\n});\n```\n\n## Related\n\n- [postcss][postcss] - Transforming styles with JS plugins\n- [ava][ava] - Futuristic JavaScript test runner\n- [one-liner][one-liner] - Module used for comparing excepted and real CSS\noutput\n\n## License\n\nThis project is licensed under the [MIT license](LICENSE).\n\n[travis badge]: https://travis-ci.org/dimitrinicolas/ava-postcss-tester.svg?branch=master\n[travis link]: https://travis-ci.org/dimitrinicolas/ava-postcss-tester\n[coveralls badge]: https://coveralls.io/repos/github/dimitrinicolas/ava-postcss-tester/badge.svg?branch=master\n[coveralls link]: https://coveralls.io/github/dimitrinicolas/ava-postcss-tester?branch=master\n\n[postcss]: https://github.com/postcss/postcss\n[ava]: https://github.com/avajs/ava\n[one-liner]: https://www.npmjs.com/package/one-liner\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdimitrinicolas%2Fava-postcss-tester","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdimitrinicolas%2Fava-postcss-tester","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdimitrinicolas%2Fava-postcss-tester/lists"}