feat(fixtures): allow formatting fixtures results (#39)

Author: André Neves

.all-contributorsrc

@@ -69,6 +69,16 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "andrefgneves",
+      "name": "André Neves",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/3869532?v=4",
+      "profile": "http://andreneves.work",
+      "contributions": [
+        "code",
+        "test"
+      ]
     }
   ],
   "repoType": "github"

README.md

@@ -9,7 +9,7 @@ Utilities for testing babel plugins
 [![downloads][downloads-badge]][npm-stat]
 [![MIT License][license-badge]][license]
 
-[![All Contributors](https://img.shields.io/badge/all_contributors-6-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-7-orange.svg?style=flat-square)](#contributors)
 [![PRs Welcome][prs-badge]][prs]
 [![Donate][donate-badge]][donate]
 [![Code of Conduct][coc-badge]][coc]
@@ -463,8 +463,8 @@ Thanks goes to these people ([emoji key][emojis]):
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore -->
-| [<img src="https://avatars.githubusercontent.com/u/1500684?v=3" width="100px;" alt="Kent C. Dodds"/><br /><sub><b>Kent C. Dodds</b></sub>](https://kentcdodds.com)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=kentcdodds "Code") [📖](https://github.com/babel-utils/babel-plugin-tester/commits?author=kentcdodds "Documentation") [🚇](#infra-kentcdodds "Infrastructure (Hosting, Build-Tools, etc)") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=kentcdodds "Tests") | [<img src="https://avatars3.githubusercontent.com/u/952783?v=3" width="100px;" alt="james kyle"/><br /><sub><b>james kyle</b></sub>](http://thejameskyle.com/)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=thejameskyle "Code") [📖](https://github.com/babel-utils/babel-plugin-tester/commits?author=thejameskyle "Documentation") [👀](#review-thejameskyle "Reviewed Pull Requests") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=thejameskyle "Tests") | [<img src="https://avatars1.githubusercontent.com/u/1894628?v=3" width="100px;" alt="Brad Bohen"/><br /><sub><b>Brad Bohen</b></sub>](https://github.com/bbohen)<br />[🐛](https://github.com/babel-utils/babel-plugin-tester/issues?q=author%3Abbohen "Bug reports") | [<img src="https://avatars0.githubusercontent.com/u/1295580?v=3" width="100px;" alt="Kyle Welch"/><br /><sub><b>Kyle Welch</b></sub>](http://www.krwelch.com)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=kwelch "Code") [📖](https://github.com/babel-utils/babel-plugin-tester/commits?author=kwelch "Documentation") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=kwelch "Tests") | [<img src="https://avatars3.githubusercontent.com/u/6680299?v=4" width="100px;" alt="kontrollanten"/><br /><sub><b>kontrollanten</b></sub>](https://github.com/kontrollanten)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=kontrollanten "Code") | [<img src="https://avatars3.githubusercontent.com/u/117921?v=4" width="100px;" alt="Rubén Norte"/><br /><sub><b>Rubén Norte</b></sub>](https://github.com/rubennorte)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=rubennorte "Code") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=rubennorte "Tests") |
-| :---: | :---: | :---: | :---: | :---: | :---: |
+| [<img src="https://avatars.githubusercontent.com/u/1500684?v=3" width="100px;" alt="Kent C. Dodds"/><br /><sub><b>Kent C. Dodds</b></sub>](https://kentcdodds.com)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=kentcdodds "Code") [📖](https://github.com/babel-utils/babel-plugin-tester/commits?author=kentcdodds "Documentation") [🚇](#infra-kentcdodds "Infrastructure (Hosting, Build-Tools, etc)") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=kentcdodds "Tests") | [<img src="https://avatars3.githubusercontent.com/u/952783?v=3" width="100px;" alt="james kyle"/><br /><sub><b>james kyle</b></sub>](http://thejameskyle.com/)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=thejameskyle "Code") [📖](https://github.com/babel-utils/babel-plugin-tester/commits?author=thejameskyle "Documentation") [👀](#review-thejameskyle "Reviewed Pull Requests") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=thejameskyle "Tests") | [<img src="https://avatars1.githubusercontent.com/u/1894628?v=3" width="100px;" alt="Brad Bohen"/><br /><sub><b>Brad Bohen</b></sub>](https://github.com/bbohen)<br />[🐛](https://github.com/babel-utils/babel-plugin-tester/issues?q=author%3Abbohen "Bug reports") | [<img src="https://avatars0.githubusercontent.com/u/1295580?v=3" width="100px;" alt="Kyle Welch"/><br /><sub><b>Kyle Welch</b></sub>](http://www.krwelch.com)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=kwelch "Code") [📖](https://github.com/babel-utils/babel-plugin-tester/commits?author=kwelch "Documentation") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=kwelch "Tests") | [<img src="https://avatars3.githubusercontent.com/u/6680299?v=4" width="100px;" alt="kontrollanten"/><br /><sub><b>kontrollanten</b></sub>](https://github.com/kontrollanten)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=kontrollanten "Code") | [<img src="https://avatars3.githubusercontent.com/u/117921?v=4" width="100px;" alt="Rubén Norte"/><br /><sub><b>Rubén Norte</b></sub>](https://github.com/rubennorte)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=rubennorte "Code") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=rubennorte "Tests") | [<img src="https://avatars2.githubusercontent.com/u/3869532?v=4" width="100px;" alt="André Neves"/><br /><sub><b>André Neves</b></sub>](http://andreneves.work)<br />[💻](https://github.com/babel-utils/babel-plugin-tester/commits?author=andrefgneves "Code") [⚠️](https://github.com/babel-utils/babel-plugin-tester/commits?author=andrefgneves "Tests") |
+| :---: | :---: | :---: | :---: | :---: | :---: | :---: |
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 

src/__tests__/index.js

@@ -603,6 +603,17 @@ test('allows formatting the result', async () => {
   expect(formatResultSpy).toHaveBeenCalledWith(simpleTest)
 })
 
+test('allows formatting fixtures results', async () => {
+  const formatResultSpy = jest.fn(r => r)
+  await runPluginTester(
+    getOptions({
+      fixtures: getFixturePath('fixtures'),
+      formatResult: formatResultSpy,
+    }),
+  )
+  expect(formatResultSpy).toHaveBeenCalledTimes(7)
+})
+
 function getOptions(overrides) {
   return {
     pluginName: 'captains-log',

src/index.js

@@ -225,7 +225,14 @@ const createFixtureTests = (fixturesDir, options) => {
 
     const ext = /\.ts$/.test(codePath) ? '.ts' : '.js'
     it(blockTitle, () => {
-      const {plugin, pluginOptions, fixtureOutputName, babel, ...rest} = options
+      const {
+        plugin,
+        pluginOptions,
+        fixtureOutputName,
+        babel,
+        formatResult = r => r,
+        ...rest
+      } = options
 
       const babelRcPath = path.join(fixtureDir, '.babelrc')
 
@@ -242,7 +249,9 @@ const createFixtureTests = (fixturesDir, options) => {
         },
         rest,
       )
-      const actual = babel.transformFileSync(codePath, babelOptions).code.trim()
+      const actual = formatResult(
+        babel.transformFileSync(codePath, babelOptions).code.trim(),
+      )
 
       const outputPath = path.join(fixtureDir, `${fixtureOutputName}${ext}`)