Add some timers to fixtures for testing

Author: sebmarkbage

fixtures/flight/src/actions.js

@@ -2,7 +2,13 @@
 
 import {setServerState} from './ServerState.js';
 
+async function sleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
 export async function like() {
+  // Test loading state
+  await sleep(1000);
   setServerState('Liked!');
   return new Promise((resolve, reject) => resolve('Liked'));
 }
@@ -20,5 +26,7 @@ export async function greet(formData) {
 }
 
 export async function increment(n) {
+  // Test loading state
+  await sleep(1000);
   return n + 1;
 }

fixtures/view-transition/src/components/Page.js

@@ -18,6 +18,10 @@ import './Page.css';
 
 import transitions from './Transitions.module.css';
 
+async function sleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
 const a = (
   <div key="a">
     <ViewTransition>
@@ -106,7 +110,13 @@ export default function Page({url, navigate}) {
       document.body
     )
   ) : (
-    <button onClick={() => startTransition(() => setShowModal(true))}>
+    <button
+      onClick={() =>
+        startTransition(async () => {
+          setShowModal(true);
+          await sleep(2000);
+        })
+      }>
       Show Modal
     </button>
   );