Nuxt/test/unit/ssr.test.js

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import { uniq } from 'lodash'
import { loadFixture, getPort, Nuxt, Utils, rp } from '../utils'
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let port
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let nuxt = null
// Utils
const range = n => [...Array(n).keys()]
const FOOBAR_REGEX = /<foobar>([\s\S]*)<\/foobar>/
const match = (regex, text) => (regex.exec(text) || [])[1]
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const url = route => 'http://localhost:' + port + route
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// const isWindows = /^win/.test(process.platform)
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// == Uniq Test ==
// The idea behind is pages using a shared nextId() which returns an incrementing id
// So all responses should strictly be different and length of unique responses should equal to responses
// We strictly compare <foorbar>{id}</foorbar> section
// Because other response parts such as window.__NUXT may be different resulting false positive passes.
const uniqueTest = async (url) => {
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const results = []
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await Utils.parallel(range(5), async () => {
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const { html } = await nuxt.renderRoute(url)
const foobar = match(FOOBAR_REGEX, html)
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results.push(parseInt(foobar))
})
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const isUnique = uniq(results).length === results.length
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if (!isUnique) {
/* eslint-disable no-console */
console.log(url + '\n' + results.join(', ') + '\n')
}
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expect(isUnique).toBe(true)
return results
}
// == Stress Test ==
// The idea of this test is to ensure there is no memory or data leak during SSR requests
// Or pending promises/sockets and function calls.
// Related issue: https://github.com/nuxt/nuxt.js/issues/1354
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const stressTest = async (_url, concurrency = 2, steps = 4) => {
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const statusCodes = {}
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await Utils.sequence(range(steps), async () => {
await Utils.parallel(range(concurrency), async () => {
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const response = await rp(url(_url), { resolveWithFullResponse: true })
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// Status Code
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const code = response.statusCode
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if (!statusCodes[code]) {
statusCodes[code] = 0
}
statusCodes[code]++
})
})
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expect(statusCodes[200]).toBe(concurrency * steps)
}
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describe('ssr', () => {
beforeAll(async () => {
const config = await loadFixture('ssr')
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nuxt = new Nuxt(config)
port = await getPort()
await nuxt.listen(port, 'localhost')
})
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test('unique responses with data()', async () => {
await uniqueTest('/data')
})
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test('unique responses with component', async () => {
await uniqueTest('/component')
})
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test('unique responses with async components', async () => {
await uniqueTest('/asyncComponent')
})
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test('unique responses with asyncData()', async () => {
await uniqueTest('/asyncData')
})
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test('unique responses with store initial state', async () => {
await uniqueTest('/store')
})
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test('unique responses with nuxtServerInit', async () => {
await uniqueTest('/store?onServerInit=1')
})
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test('unique responses with fetch', async () => {
await uniqueTest('/fetch')
})
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test('stress test with asyncData', async () => {
await stressTest('/asyncData')
})
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// Close server and ask nuxt to stop listening to file changes
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afterAll(async () => {
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await nuxt.close()
})
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})