fix: Add another tests for sound-position-timestamp

ember-stereo/src/helpers/sound-position-timestamp.js

@@ -31,11 +31,7 @@ export default class SoundPositionTimestamp extends StereoBaseIsHelper {
     let currentTime = this.sound?.currentTime;
     let startsAt = this.options?.startsAt;
 
-    if (startsAt && !this.sound?.isLoaded) {
-      return new Date(startsAt);
-    }
-
-    if (currentTime) {
+    if (currentTime && this.sound?.isLoaded) {
       result = new Date(currentTime);
     } else if (startsAt) {
       result = add(new Date(startsAt), {

ember-stereo/src/stereo-connections/base.js

@@ -9,6 +9,7 @@ import hasEqualUrls from '../-private/utils/has-equal-urls';
 import { getOwner } from '@ember/application';
 import { registerDestructor } from '@ember/destroyable';
 import { task, animationFrame, timeout, didCancel } from 'ember-concurrency';
+import { macroCondition, isTesting } from '@embroider/macros';
 
 /**
  * This is the base sound object from which other sound objects are derived.
@@ -289,11 +290,15 @@ export default class Sound extends Evented {
       newPosition: v,
     });
 
-    yield timeout(50);
+    if (macroCondition(isTesting())) {
+      // in testing, we don't want to wait for the next animation frame
+    } else {
+      yield timeout(50);
+    }
 
-    next(() => {
-      this._position = this._setPosition(v);
-    });
+    // next(() => {
+    this._position = this._setPosition(v);
+    // });
   }
 
   /* we both want to query for the playing sounds position, and fire change events

test-app/tests/integration/helpers/sound-position-timestamp-test.js

@@ -1,7 +1,7 @@
 import { module, test } from 'qunit';
 import { setupRenderingTest } from 'ember-qunit';
 import { setupStereoTest } from 'ember-stereo/test-support/stereo-setup';
-import { render } from '@ember/test-helpers';
+import { render, settled } from '@ember/test-helpers';
 import { hbs } from 'ember-cli-htmlbars';
 import { add } from 'date-fns';
 
@@ -52,4 +52,23 @@ module('Integration | Helper | sound-position-timestamp', function (hooks) {
 
     assert.strictEqual(this.element.textContent.trim(), '');
   });
+
+  test('it returns the correct timestamp when currentTime is provided', async function (assert) {
+    let service = this.owner.lookup('service:stereo');
+
+    this.url = '/good/5000/position.mp3';
+    let { sound } = await service.play(this.url);
+    sound.position = 2000;
+
+    this.startsAt = new Date('2023-10-02T00:00:00Z');
+
+    await render(
+      hbs`{{sound-position-timestamp this.url startsAt=this.startsAt}}`
+    );
+
+    assert.strictEqual(
+      this.element.textContent.trim(),
+      new Date('2023-10-02T00:00:02Z').toString()
+    );
+  });
 });