import { nextTestSetup } from 'e2e-utils'
describe('react-performance-track', () => {
// false is the default when visiting pages as an ordinary user.
// true is the default when having Chrome DevTools open.
// Hardcoded for now since most of the actual behavior is not intended.
const disableCache = false
const extraHTTPHeaders = disableCache
? { 'Cache-Control': 'no-cache' }
: undefined
const { next } = nextTestSetup({
files: __dirname,
})
it('should show setTimeout', async () => {
const browser = await next.browser('/set-timeout', { extraHTTPHeaders })
await browser.elementByCss('[data-react-server-requests-done]', {
state: 'attached',
})
const track = await browser.eval('window.reactServerRequests.getSnapshot()')
expect(track).toEqual(
expect.arrayContaining([
{ name: '\u200bsetTimeout', properties: [] },
{ name: '\u200bsetTimeout', properties: [] },
])
)
})
it('should show fetch', async () => {
const browser = await next.browser('/fetch', { extraHTTPHeaders })
await browser.elementByCss('[data-react-server-requests-done]', {
state: 'attached',
})
const track = await browser.eval('window.reactServerRequests.getSnapshot()')
expect(track).toEqual(
expect.arrayContaining([
{
// React might decide to display the shorthand in round brackets differently.
// Double check with React changes if a shorthand change is intended.
name: '\u200bfetch (…/random)',
properties: expect.arrayContaining([
['status', '200'],
['url', '"https://next-data-api-endpoint.vercel.app/api/random"'],
]),
},
])
)
})
it('should show params', async () => {
const browser = await next.browser('/params/next', { extraHTTPHeaders })
await browser.elementByCss('[data-react-server-requests-done]', {
state: 'attached',
})
const track = await browser.eval('window.reactServerRequests.getSnapshot()')
expect(track).toEqual(
expect.arrayContaining([
{
name: '\u200bparams [Prefetchable]',
properties: [],
},
])
)
})
it('should show searchParams', async () => {
const browser = await next.browser('/searchparams?slug=next', {
extraHTTPHeaders,
})
await browser.elementByCss('[data-react-server-requests-done]', {
state: 'attached',
})
const track = await browser.eval('window.reactServerRequests.getSnapshot()')
expect(track).toEqual(
expect.arrayContaining([
{
name: '\u200bsearchParams [Prefetchable]',
properties: [],
},
])
)
})
it('should show cookies', async () => {
const browser = await next.browser('/cookies', { extraHTTPHeaders })
await browser.elementByCss('[data-react-server-requests-done]', {
state: 'attached',
})
const track = await browser.eval('window.reactServerRequests.getSnapshot()')
expect(track).toEqual(
expect.arrayContaining([
{
name: '\u200bcookies [Prefetchable]',
properties: [],
},
])
)
})
it('should show draftMode', async () => {
const browser = await next.browser('/draftMode', { extraHTTPHeaders })
await browser.elementByCss('[data-react-server-requests-done]', {
state: 'attached',
})
const track = await browser.eval('window.reactServerRequests.getSnapshot()')
// TODO the addition of a promise to delay some Segments from rendering until the later Static
// stage has caused the draftMode snapshot to include an empty-named entry. This is probably
// a bug in React and should be fixed there but
// expect(track).toEqual([])
expect(track).toEqual(
expect.arrayContaining([
{
name: '\u200b [Prerender]',
properties: [],
},
])
)
let didThrow = false
try {
// including this anti-assertion here so we can restore the test when the bug in React is fixed
expect(track).toEqual([])
} catch (e) {
didThrow = true
}
expect(didThrow).toBe(true)
})
it('should show headers', async () => {
const browser = await next.browser('/headers', { extraHTTPHeaders })
await browser.elementByCss('[data-react-server-requests-done]', {
state: 'attached',
})
const track = await browser.eval('window.reactServerRequests.getSnapshot()')
expect(track).toEqual(
expect.arrayContaining([
{
name: '\u200bheaders [Prefetchable]',
properties: [],
},
])
)
})
})