✨ [amp-carousel]: Expose ampTrust in slideChange event

extensions/amp-carousel/0.2/amp-carousel.js

@@ -565,14 +565,15 @@ class AmpCarousel extends AMP.BaseElement {
       return;
     }
 
-    const data = dict({'index': index});
     const name = 'slideChange';
     const isHighTrust = this.isHighTrustActionSource_(actionSource);
     const trust = isHighTrust ? ActionTrust.HIGH : ActionTrust.LOW;
+    const data = dict({'index': index});
+    const dataWithActionTrust = dict({'index': index, 'actionTrust': trust});
 
     const action = createCustomEvent(this.win, `slidescroll.${name}`, data);
     this.action_.trigger(this.element, name, action, trust);
-    dispatchCustomEvent(this.element, name, data);
+    dispatchCustomEvent(this.element, name, dataWithActionTrust);
     this.triggerAnalyticsEvent_(prevIndex, index);
   }
 

extensions/amp-carousel/0.2/test/test-type-slides.js

@@ -280,15 +280,22 @@ describes.realWin(
         expect(eventSpy).to.have.not.been.called;
       });
 
-      it('should dispatch when changing slides', async () => {
-        const eventSpy = env.sandbox.spy();
-        container.addEventListener('slideChange', eventSpy);
+      it('should dispatch event with index and actionTrust when changing slides', async () => {
+        let event;
+        let counter = 0;
+        container.addEventListener('slideChange', (e) => {
+          counter++;
+          event = e;
+        });
         const carousel = await getCarousel({loop: false});
 
         carousel.implementation_.interactionNext();
+
         await afterIndexUpdate(carousel);
 
-        expect(eventSpy).to.have.been.calledOnce;
+        expect(counter).to.equal(1);
+        expect(event.data.index).to.equal(1);
+        expect(event.data.actionTrust).to.equal(ActionTrust.HIGH);
       });
     });