/
styled-components.test.ts
87 lines (75 loc) · 2.41 KB
/
styled-components.test.ts
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import { join } from 'path'
import webdriver from 'next-webdriver'
import { createNext, FileRef } from 'e2e-utils'
import { NextInstance } from 'test/lib/next-modes/base'
import { fetchViaHTTP, renderViaHTTP } from 'next-test-utils'
describe('styled-components SWC transform', () => {
let next: NextInstance
beforeAll(async () => {
next = await createNext({
files: {
'next.config.js': new FileRef(
join(__dirname, 'styled-components/next.config.js')
),
pages: new FileRef(join(__dirname, 'styled-components/pages')),
},
dependencies: {
'styled-components': '5.3.3',
},
})
})
afterAll(() => next.destroy())
async function matchLogs$(browser) {
let foundLog = false
const browserLogs = await browser.log('browser')
browserLogs.forEach((log) => {
if (log.message.includes('Warning: Prop `%s` did not match.')) {
foundLog = true
}
})
return foundLog
}
it('should not have hydration mismatch with styled-components transform enabled', async () => {
let browser
try {
browser = await webdriver(next.appPort, '/')
// Compile /_error
await fetchViaHTTP(next.appPort, '/404')
// Try 4 times to be sure there is no mismatch
expect(await matchLogs$(browser)).toBe(false)
await browser.refresh()
expect(await matchLogs$(browser)).toBe(false)
await browser.refresh()
expect(await matchLogs$(browser)).toBe(false)
await browser.refresh()
expect(await matchLogs$(browser)).toBe(false)
} finally {
if (browser) {
await browser.close()
}
}
})
it('should render the page with correct styles', async () => {
const browser = await webdriver(next.appPort, '/')
expect(
await browser.eval(
`window.getComputedStyle(document.querySelector('#btn')).color`
)
).toBe('rgb(255, 255, 255)')
})
it('should contain styles in initial HTML', async () => {
const html = await renderViaHTTP(next.url, '/')
expect(html).toContain('background:transparent')
expect(html).toContain('color:white')
})
it('should only render once on the server per request', async () => {
const outputs = []
next.on('stdout', (args) => {
outputs.push(args)
})
await renderViaHTTP(next.url, '/')
expect(
outputs.filter((output) => output.trim() === '__render__').length
).toBe(1)
})
})