Add Promise as a child test to Flight fixture (#28778)

facebook · Apr 8, 2024 · e63918d · e63918d
1 parent f86afca
commit e63918d
Show file tree

Hide file tree

Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/fixtures/flight/__tests__/__e2e__/smoke.test.js b/fixtures/flight/__tests__/__e2e__/smoke.test.js
@@ -13,7 +13,9 @@ test('smoke test', async ({page}) => {
     pageErrors.push(error.stack);
   });
   await page.goto('/');
-  await expect(page.locator('h1')).toHaveText('Hello World');
+  await expect(page.getByTestId('promise-as-a-child-test')).toHaveText(
+    'Promise as a child hydrates without errors: deferred text'
+  );
 
   await expect(consoleErrors).toEqual([]);
   await expect(pageErrors).toEqual([]);

diff --git a/fixtures/flight/src/App.js b/fixtures/flight/src/App.js
@@ -19,6 +19,10 @@ import {like, greet, increment} from './actions.js';
 
 import {getServerState} from './ServerState.js';
 
+const promisedText = new Promise(resolve =>
+  setTimeout(() => resolve('deferred text'), 100)
+);
+
 export default async function App() {
   const res = await fetch('http://localhost:3001/todos');
   const todos = await res.json();
@@ -32,6 +36,11 @@ export default async function App() {
       <body>
         <Container>
           <h1>{getServerState()}</h1>
+          <React.Suspense fallback={null}>
+            <div data-testid="promise-as-a-child-test">
+              Promise as a child hydrates without errors: {promisedText}
+            </div>
+          </React.Suspense>
           <Counter incrementAction={increment} />
           <Counter2 incrementAction={increment} />
           <Counter3 incrementAction={increment} />