add tests

test/integration/image-component/default/test/index.test.js

@@ -22,6 +22,19 @@ const nextConfig = join(appDir, 'next.config.js')
 let appPort
 let app
 
+async function hasImageMatchingUrl(browser, url) {
+  const links = await browser.elementsByCss('img')
+  let foundMatch = false
+  for (const link of links) {
+    const src = await link.getAttribute('src')
+    if (src === url) {
+      foundMatch = true
+      break
+    }
+  }
+  return foundMatch
+}
+
 function runTests(mode) {
   it('should load the images', async () => {
     let browser
@@ -54,6 +67,16 @@ function runTests(mode) {
 
         return 'result-correct'
       }, /result-correct/)
+
+      expect(
+        await hasImageMatchingUrl(
+          browser,
+          mode === 'serverless'
+            ? // FIXME: this is a bug
+              `http://localhost:${appPort}/_next/image/?url=%2Ftest.jpg&w=420&q=75`
+            : `http://localhost:${appPort}/_next/image?url=%2Ftest.jpg&w=420&q=75`
+        )
+      ).toBe(true)
     } finally {
       if (browser) {
         await browser.close()