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index.test.js
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index.test.js
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import path from 'path'
import fs from 'fs-extra'
import { rollup } from 'rollup'
import postcss from '../src'
process.env.ROLLUP_POSTCSS_TEST = true
/**
* solve jest timeout on Windows OS
*/
const JEST_TIMEOUT = process.platform === 'win32' ? 20000 : 5000
function fixture(...args) {
return path.join(__dirname, 'fixtures', ...args)
}
beforeAll(() => fs.remove(fixture('dist')))
async function write({
input,
outDir,
options
}) {
const { delayResolve, ...postCssOptions } = options
let first = true
// Delay the resolving of the first css file
const lateResolve = {
name: 'late-resolve',
async resolveId(importee) {
// when it's not a css file and not the first css file we return
if (!first || !importee.endsWith('.css')) {
return null
}
first = false
// delay resolving
return new Promise(resolve => {
setTimeout(() => resolve(null), 1000)
})
}
}
outDir = fixture('dist', outDir)
const bundle = await rollup({
input: fixture(input),
plugins: [postcss(postCssOptions), delayResolve && lateResolve].filter(
Boolean
)
})
await bundle.write({
format: 'cjs',
file: path.join(outDir, 'bundle.js')
})
let cssCodePath = path.join(outDir, 'bundle.css')
if (typeof options.extract === 'string') {
if (path.isAbsolute(options.extract)) {
cssCodePath = options.extract
} else {
cssCodePath = path.join(outDir, options.extract)
}
}
const cssMapPath = `${cssCodePath}.map`
const jsCodePath = path.join(outDir, 'bundle.js')
return {
jsCode() {
return fs.readFile(jsCodePath, 'utf8')
},
cssCode() {
return fs.readFile(cssCodePath, 'utf8')
},
cssMap() {
return fs.readFile(cssMapPath, 'utf8')
},
hasCssFile() {
return fs.pathExists(cssCodePath)
},
hasCssMapFile() {
return fs.pathExists(cssMapPath)
}
}
}
function snapshot({
title,
input,
outDir,
options = {}
}) {
test(title, async () => {
let result
try {
result = await write({
input,
outDir,
options
})
} catch (error) {
const frame = error.codeFrame || error.snippet
if (frame) {
throw new Error(frame + error.message)
}
throw error
}
expect(await result.jsCode()).toMatchSnapshot('js code')
if (options.extract) {
expect(await result.hasCssFile()).toBe(true)
expect(await result.cssCode()).toMatchSnapshot('css code')
}
const sourceMap = options && options.sourceMap
if (sourceMap === 'inline') {
expect(await result.hasCssMapFile()).toBe(false)
} else if (sourceMap === true) {
expect(await result.hasCssMapFile()).toBe(Boolean(options.extract))
if (options.extract) {
expect(await result.cssMap()).toMatchSnapshot('css map')
}
}
}, JEST_TIMEOUT)
}
function snapshotMany(title, tests) {
describe(title, () => {
for (const test of tests) {
snapshot({
...test,
outDir: `${title}--${test.title}`
})
}
})
}
snapshotMany('basic', [
{
title: 'simple',
input: 'simple/index.js'
},
{
title: 'postcss-config',
input: 'postcss-config/index.js'
},
{
title: 'skip-loader',
input: 'skip-loader/index.js',
options: {
use: ['loader'],
loaders: [
{
name: 'loader',
test: /\.random$/,
process() {
return 'lol'
}
}
]
}
},
{
title: 'postcss-options',
input: 'postcss-options/index.js',
options: {
plugins: [
require('autoprefixer')()
]
}
}
])
snapshotMany('minimize', [
{
title: 'inject',
input: 'simple/index.js',
options: {
minimize: true
}
},
{
title: 'extract',
input: 'simple/index.js',
options: {
minimize: true,
extract: true
}
},
{
title: 'extract-sourcemap-true',
input: 'simple/index.js',
options: {
minimize: true,
extract: true,
sourceMap: true
}
},
{
title: 'extract-sourcemap-inline',
input: 'simple/index.js',
options: {
minimize: true,
extract: true,
sourceMap: 'inline'
}
}
])
snapshotMany('modules', [
{
title: 'inject',
input: 'css-modules/index.js',
options: {
modules: true
}
},
{
title: 'inject-object',
input: 'css-modules/index.js',
options: {
autoModules: false,
modules: {
getJSON() {
//
}
}
}
},
{
title: 'named-exports',
input: 'named-exports/index.js',
options: {
modules: true,
namedExports: true
}
},
{
title: 'named-exports-custom-class-name',
input: 'named-exports/index.js',
options: {
modules: true,
namedExports(name) {
return name + 'hacked'
}
}
},
{
title: 'extract',
input: 'css-modules/index.js',
options: {
modules: true,
extract: true
}
},
{
title: 'auto-modules',
input: 'auto-modules/index.js'
}
])
snapshotMany('sourcemap', [
{
title: 'true',
input: 'simple/index.js',
options: {
sourceMap: true
}
},
// Is it broken?
{
title: 'inline',
input: 'simple/index.js',
options: {
sourceMap: 'inline'
}
}
])
snapshotMany('extract', [
{
title: 'true',
input: 'simple/index.js',
options: {
extract: true
}
},
{
title: 'custom-path',
input: 'simple/index.js',
options: {
extract: fixture('dist/extract--custom-path/this/is/extracted.css'),
sourceMap: true
}
},
{
title: 'relative-path',
input: 'simple/index.js',
options: {
extract: 'this/is/extracted.css',
sourceMap: true
}
},
{
title: 'sourcemap-true',
input: 'simple/index.js',
options: {
sourceMap: true,
extract: true
}
},
{
title: 'sourcemap-inline',
input: 'simple/index.js',
options: {
sourceMap: 'inline',
extract: true
}
},
{
title: 'nested',
input: 'nested/index.js',
options: {
sourceMap: 'inline',
extract: true
}
},
{
title: 'nested-delay-resolve',
input: 'nested/index.js',
options: {
sourceMap: 'inline',
extract: true,
delayResolve: true
}
}
])
snapshotMany('inject', [
{
title: 'top',
input: 'simple/index.js',
options: {
inject: {
insertAt: 'top'
}
}
},
{
title: 'function',
input: 'simple/index.js',
options: {
inject: variableName => `console.log(${variableName})`
}
},
{
title: 'false',
input: 'simple/index.js',
options: {
inject: false
}
}
])
snapshotMany('sass', [
{
title: 'default',
input: 'sass/index.js'
},
{
title: 'sourcemap',
input: 'sass/index.js',
options: {
sourceMap: true
}
},
{
title: 'modules',
input: 'sass-modules/index.js',
options: {
modules: true
}
},
{
title: 'data-prepend',
input: 'sass-data-prepend/index.js',
options: {
use: [
[
'sass',
{ data: '@import \'prepend\';' }
]
]
}
},
{
title: 'data-prepend',
input: 'sass-data-prepend/index.js',
options: {
use: {
sass: { data: '@import \'prepend\';' }
}
}
},
{
title: 'import',
input: 'sass-import/index.js'
}
])
test('onExtract', async () => {
const result = await write({
input: 'simple/index.js',
outDir: 'onExtract',
options: {
extract: true,
onExtract() {
return false
}
}
})
expect(await result.jsCode()).toMatchSnapshot()
expect(await result.hasCssFile()).toBe(false)
})
test('augmentChunkHash', async () => {
const outDir = fixture('dist', 'augmentChunkHash')
const cssFiles = ['simple/foo.css', 'simple/foo.css', 'simple/bar.css']
const outputFiles = []
/* eslint-disable no-await-in-loop */
for (const file of cssFiles) {
const newBundle = await rollup({
input: fixture(file),
plugins: [postcss({ extract: true })]
})
const entryFileName = file.split('.')[0]
const { output } = await newBundle.write({
dir: outDir,
entryFileNames: `${entryFileName}.[hash].css`
})
outputFiles.push(output[0])
}
const [fooOne, fooTwo, barOne] = outputFiles
const fooHash = fooOne.fileName.split('.')[1]
expect(fooHash).toBeTruthy() // Verify that [hash] part of `foo.[hash].css` is truthy
expect(fooOne.fileName).toEqual(fooTwo.fileName) // Verify that the foo hashes to the same fileName
const barHash = barOne.fileName.split('.')[1]
expect(barHash).not.toEqual(fooHash) // Verify that foo and bar does not hash to the same
})