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css.spec.ts
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css.spec.ts
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import fs from 'node:fs'
import path from 'node:path'
import { describe, expect, test, vi } from 'vitest'
import { resolveConfig } from '../../config'
import type { InlineConfig } from '../../config'
import { cssPlugin, cssUrlRE, hoistAtRules } from '../../plugins/css'
describe('search css url function', () => {
test('some spaces before it', () => {
expect(
cssUrlRE.test("list-style-image: url('../images/bullet.jpg');")
).toBe(true)
})
test('no space after colon', () => {
expect(cssUrlRE.test("list-style-image:url('../images/bullet.jpg');")).toBe(
true
)
})
test('at the beginning of line', () => {
expect(cssUrlRE.test("url('../images/bullet.jpg');")).toBe(true)
})
test('as suffix of a function name', () => {
expect(
cssUrlRE.test(`@function svg-url($string) {
@return "";
}`)
).toBe(false)
})
test('after parenthesis', () => {
expect(
cssUrlRE.test(
'mask-image: image(url(mask.png), skyblue, linear-gradient(rgba(0, 0, 0, 1.0), transparent));'
)
).toBe(true)
})
test('after comma', () => {
expect(
cssUrlRE.test(
'mask-image: image(skyblue,url(mask.png), linear-gradient(rgba(0, 0, 0, 1.0), transparent));'
)
).toBe(true)
})
})
describe('css modules', () => {
test('css module compose/from path resolutions', async () => {
const mockedProjectPath = path.join(process.cwd(), '/foo/bar/project')
const { transform, resetMock } = await createCssPluginTransform(
{
[path.join(mockedProjectPath, '/css/bar.module.css')]: `\
.bar {
display: block;
background: #f0f;
}`
},
{
resolve: {
alias: [
{
find: '@',
replacement: mockedProjectPath
}
]
}
}
)
const result = await transform(
`\
.foo {
position: fixed;
composes: bar from '@/css/bar.module.css';
}`,
'/css/foo.module.css'
)
expect(result.code).toBe(
`\
._bar_1csqm_1 {
display: block;
background: #f0f;
}
._foo_86148_1 {
position: fixed;
}`
)
resetMock()
})
test('custom generateScopedName', async () => {
const { transform, resetMock } = await createCssPluginTransform(undefined, {
css: {
modules: {
generateScopedName: 'custom__[hash:base64:5]'
}
}
})
const css = `\
.foo {
color: red;
}`
const result1 = await transform(css, '/foo.module.css') // server
const result2 = await transform(css, '/foo.module.css?direct') // client
expect(result1.code).toBe(result2.code)
resetMock()
})
})
describe('hoist @ rules', () => {
test('hoist @import', async () => {
const css = `.foo{color:red;}@import "bla";`
const result = await hoistAtRules(css)
expect(result).toBe(`@import "bla";.foo{color:red;}`)
})
test('hoist @import url with semicolon', async () => {
const css = `.foo{color:red;}@import url("bla;bla");`
const result = await hoistAtRules(css)
expect(result).toBe(`@import url("bla;bla");.foo{color:red;}`)
})
test('hoist @import url data with semicolon', async () => {
const css = `.foo{color:red;}@import url(data:image/png;base64,iRxVB0);`
const result = await hoistAtRules(css)
expect(result).toBe(
`@import url(data:image/png;base64,iRxVB0);.foo{color:red;}`
)
})
test('hoist @import with semicolon in quotes', async () => {
const css = `.foo{color:red;}@import "bla;bar";`
const result = await hoistAtRules(css)
expect(result).toBe(`@import "bla;bar";.foo{color:red;}`)
})
test('hoist @charset', async () => {
const css = `.foo{color:red;}@charset "utf-8";`
const result = await hoistAtRules(css)
expect(result).toBe(`@charset "utf-8";.foo{color:red;}`)
})
test('hoist one @charset only', async () => {
const css = `.foo{color:red;}@charset "utf-8";@charset "utf-8";`
const result = await hoistAtRules(css)
expect(result).toBe(`@charset "utf-8";.foo{color:red;}`)
})
test('hoist @import and @charset', async () => {
const css = `.foo{color:red;}@import "bla";@charset "utf-8";.bar{color:green;}@import "baz";`
const result = await hoistAtRules(css)
expect(result).toBe(
`@charset "utf-8";@import "bla";@import "baz";.foo{color:red;}.bar{color:green;}`
)
})
test('dont hoist @import in comments', async () => {
const css = `.foo{color:red;}/* @import "bla"; */@import "bar";`
const result = await hoistAtRules(css)
expect(result).toBe(`@import "bar";.foo{color:red;}/* @import "bla"; */`)
})
test('dont hoist @charset in comments', async () => {
const css = `.foo{color:red;}/* @charset "utf-8"; */@charset "utf-8";`
const result = await hoistAtRules(css)
expect(result).toBe(
`@charset "utf-8";.foo{color:red;}/* @charset "utf-8"; */`
)
})
test('dont hoist @import and @charset in comments', async () => {
const css = `
.foo{color:red;}
/*
@import "bla";
*/
@charset "utf-8";
/*
@charset "utf-8";
@import "bar";
*/
@import "baz";`
const result = await hoistAtRules(css)
expect(result).toMatchInlineSnapshot(`
"@charset \\"utf-8\\";@import \\"baz\\";
.foo{color:red;}
/*
@import \\"bla\\";
*/
/*
@charset \\"utf-8\\";
@import \\"bar\\";
*/
"
`)
})
})
async function createCssPluginTransform(
files?: Record<string, string>,
inlineConfig: InlineConfig = {}
) {
const config = await resolveConfig(inlineConfig, 'serve')
const { transform, buildStart } = cssPlugin(config)
// @ts-expect-error
await buildStart.call({})
const mockFs = vi
.spyOn(fs, 'readFile')
// @ts-expect-error vi.spyOn not recognize override `fs.readFile` definition.
.mockImplementationOnce((p, encoding, callback) => {
callback(null, Buffer.from(files?.[p] ?? ''))
})
return {
async transform(code: string, id: string) {
// @ts-expect-error
return await transform.call(
{
addWatchFile() {
return
}
},
code,
id
)
},
resetMock() {
mockFs.mockReset()
}
}
}