nonext story event (#30098)

ampproject · Sep 2, 2020 · f4decd2 · f4decd2
1 parent 4c76c46
commit f4decd2
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diff --git a/src/amp-story-player/amp-story-player-impl.js b/src/amp-story-player/amp-story-player-impl.js
@@ -1181,6 +1181,14 @@ export class AmpStoryPlayer {
    * @private
    */
   onSelectDocument_(data) {
+    if (
+      !this.isCircularWrappingEnabled_() &&
+      this.currentIdx_ + 1 === this.stories_.length
+    ) {
+      this.element_.dispatchEvent(
+        createCustomEvent(this.win_, 'noNextStory', dict({}))
+      );
+    }
     if (data.next) {
       this.next_();
     } else if (data.previous) {

diff --git a/test/unit/test-amp-story-player.js b/test/unit/test-amp-story-player.js
@@ -285,6 +285,36 @@ describes.realWin('AmpStoryPlayer', {amp: false}, (env) => {
     });
   });
 
+  it('dispatch noNextStory when in last story', async () => {
+    buildStoryPlayer(1);
+
+    await manager.loadPlayers();
+    await nextTick();
+
+    const noNextSpy = env.sandbox.spy();
+    playerEl.addEventListener('noNextStory', noNextSpy);
+
+    const fakeData = {next: true};
+    fireHandler['selectDocument']('selectDocument', fakeData);
+
+    expect(noNextSpy).to.have.been.called;
+  });
+
+  it('should not dispatch noNextStory when not in last story', async () => {
+    buildStoryPlayer(2);
+
+    await manager.loadPlayers();
+    await nextTick();
+
+    const noNextSpy = env.sandbox.spy();
+    playerEl.addEventListener('noNextStory', noNextSpy);
+
+    const fakeData = {next: true};
+    fireHandler['selectDocument']('selectDocument', fakeData);
+
+    expect(noNextSpy).to.not.have.been.called;
+  });
+
   it('should navigate when swiping', async () => {
     buildStoryPlayer(4);
     await manager.loadPlayers();