add playbackrate to runtime test

test/runtime/samples/binding-audio-currenttime-duration-volume/_config.js

@@ -8,24 +8,29 @@ export default {
 		assert.equal(component.t, 0);
 		assert.equal(component.d, 0);
 		assert.equal(component.v, 0.5);
+		assert.equal(component.r, 1);
 		assert.equal(component.paused, true);
 
 		const audio = target.querySelector('audio');
 		const timeupdate = new window.Event('timeupdate');
 		const durationchange = new window.Event('durationchange');
 		const volumechange = new window.Event('volumechange');
+		const ratechange = new window.Event('ratechange');
 
 		audio.currentTime = 10;
 		audio.duration = 20;
 		audio.volume = 0.75;
+		audio.playbackRate = 2;
 		audio.dispatchEvent(timeupdate);
 		audio.dispatchEvent(durationchange);
 		audio.dispatchEvent(volumechange);
+		audio.dispatchEvent(ratechange);
 		audio.play();
 
 		assert.equal(component.t, 10);
 		assert.equal(component.d, 0); // not 20, because read-only. Not sure how to test this!
 		assert.equal(component.v, 0.75);
+		assert.equal(component.r, 2);
 		assert.equal(component.paused, true); // ditto...
 	}
 };

test/runtime/samples/binding-audio-currenttime-duration-volume/main.svelte

@@ -3,7 +3,8 @@
 	export let d;
 	export let paused;
 	export let v;
+	export let r;
 </script>
 
-<audio bind:currentTime={t} bind:duration={d} bind:paused bind:volume={v}
+<audio bind:currentTime={t} bind:duration={d} bind:paused bind:volume={v} bind:playbackRate={r}
 	src='music.mp3'></audio>