import type { Server } from "http" ; import { describe , afterAll , beforeAll , expect , test } from "vitest" ; import puppeteer from "puppeteer" ; import { execaSync as execa } from "execa" ; import { Miniflare } from "miniflare" ; const sleep = ( ms ) => new Promise ( ( resolve ) => setTimeout ( resolve , ms ) ) ; async function autoRetry ( test ) { const period = 100 ; const numberOfTries = 1000 / period ; let i = 0 ; while ( true ) { try { await test ( ) ; return ; } catch ( err ) { i = i + 1 ; if ( i > numberOfTries ) { throw err ; } } await sleep ( period ) ; } } describe ( "render" , async ( ) => { const url = "http://localhost:8787" ; let mf ; let browser ; let page ; let server ; beforeAll ( async ( ) => { execa ( "npm" , [ "run" , "build" ] , { cwd : __dirname , stdio : "inherit" } ) ; mf = new Miniflare ( ) ; browser = await puppeteer . launch ( ) ; page = await browser . newPage ( ) ; server = mf . createServer ( ) ; server . listen ( 8787 ) ; } ) ; afterAll ( async ( ) => { await browser . close ( ) ; server . close ( ) ; } ) ; test ( "page content is rendered to HTML" , async ( ) => { await page . goto ( url ) ; expect ( await page . content ( ) ) . toContain ( "<h1>Welcome</h1>" ) ; } ) ; test ( "page is rendered to the DOM and interactive" , async ( ) => { try { await page . goto ( url ) ; const h1Text = await ( await page . $ ( "h1" ) ) ?. evaluate ( ( el ) => el . textContent ) ; expect ( h1Text ) . toBe ( "Welcome" ) ; { const buttonText = await ( await page . $ ( "button" ) ) ?. evaluate ( ( el ) => el . textContent ) ; expect ( buttonText ) . toBe ( "Counter 0" ) ; } { await page . click ( "button" ) ; const buttonText = await ( await page . $ ( "button" ) ) ?. evaluate ( ( el ) => el . textContent ) ; expect ( buttonText ) . toBe ( "Counter 1" ) ; } } catch ( e ) { console . error ( e ) ; expect ( e ) . toBeUndefined ( ) ; } } ) ; test ( "about page" , async ( ) => { await page . click ( 'a[href="/about"]' ) ; autoRetry ( async ( ) => { const h1Text = await ( await page . $ ( "h1" ) ) ?. evaluate ( ( el ) => el . textContent ) ; expect ( h1Text ) . toBe ( "About" ) ; } ) ; } ) ; test ( "data fetching" , async ( ) => { await page . click ( 'a[href="/star-wars"]' ) ; autoRetry ( async ( ) => { const h1Text = await ( await page . $ ( "h1" ) ) ?. evaluate ( ( el ) => el . textContent ) ; console . log ( h1Text ) ; expect ( h1Text ) . toBe ( "Star Wars Movies" ) ; } ) ; const bodyText = await ( await page . $ ( "body" ) ) ?. evaluate ( ( el ) => el . textContent ) ; expect ( bodyText ) . toContain ( "The Phantom Menace" ) ; } ) ; } ) ;