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docs/tests/rendering/render-caching.js
2022-07-28 18:50:46 +00:00

86 lines
3.1 KiB
JavaScript

import cheerio from 'cheerio'
import { expect, jest, test } from '@jest/globals'
import { get } from '../helpers/e2etest.js'
// import { PREFERRED_LOCALE_COOKIE_NAME } from '../../middleware/detect-language.js'
import { getNextData, getPrimerData } from '../helpers/script-data.js'
const serializeTheme = (theme) => {
return encodeURIComponent(JSON.stringify(theme))
}
describe('in-memory render caching', () => {
jest.setTimeout(30 * 1000)
test('second render should be a cache hit with different theme properties', async () => {
const cookieValue1 = {
color_mode: 'light',
light_theme: { name: 'light', color_mode: 'light' },
dark_theme: { name: 'dark_high_contrast', color_mode: 'dark' },
}
// Light mode first
const res1 = await get('/en', {
headers: {
cookie: `color_mode=${serializeTheme(cookieValue1)}`,
},
})
// Because these are effectively end-to-end tests, you can't expect
// the first request to be a cache miss because another end-to-end
// test might have "warmed up" this endpoint.
expect(res1.headers['x-middleware-cache']).toBeTruthy()
const $1 = cheerio.load(res1.text)
expect($1('body').data('color-mode')).toBe(cookieValue1.color_mode)
const themeProps1 = getNextData($1).props.themeProps
expect(themeProps1.colorMode).toBe('day')
const cookieValue2 = {
color_mode: 'dark',
light_theme: { name: 'light', color_mode: 'light' },
dark_theme: { name: 'dark_high_contrast', color_mode: 'dark' },
}
const res2 = await get('/en', {
headers: {
cookie: `color_mode=${serializeTheme(cookieValue2)}`,
},
})
expect(res2.headers['x-middleware-cache']).toBeTruthy()
const $2 = cheerio.load(res2.text)
expect($2('body').data('color-mode')).toBe(cookieValue2.color_mode)
const themeProps2 = getNextData($2).props.themeProps
expect(themeProps2.colorMode).toBe('night')
})
test('second render should be cache hit with different resolvedServerColorMode in __PRIMER_DATA__', async () => {
await get('/en') // first render to assert the next render comes from cache
const res = await get('/en', {
headers: {
cookie: `color_mode=${serializeTheme({
color_mode: 'dark',
light_theme: { name: 'light', color_mode: 'light' },
dark_theme: { name: 'dark_high_contrast', color_mode: 'dark' },
})}`,
},
})
expect(res.headers['x-middleware-cache']).toBeTruthy()
const $ = cheerio.load(res.text)
const data = getPrimerData($)
expect(data.resolvedServerColorMode).toBe('night')
// Now do it all over again but with a light color mode
const res2 = await get('/en', {
headers: {
cookie: `color_mode=${serializeTheme({
color_mode: 'light',
light_theme: { name: 'light', color_mode: 'light' },
dark_theme: { name: 'dark_high_contrast', color_mode: 'dark' },
})}`,
},
})
expect(res2.headers['x-middleware-cache']).toBeTruthy()
const $2 = cheerio.load(res2.text)
const data2 = getPrimerData($2)
expect(data2.resolvedServerColorMode).toBe('day')
})
})