runfix: Fix avatar test for HiDPI (#5768)

test/unit_tests/components/participantAvatarSpec.js

@@ -33,9 +33,10 @@ describe('participant-avatar', () => {
     });
   });
 
-  it("loads user's avatar when element is visible", () => {
+  it("loads user's preview avatar when element is visible for LowDPI", () => {
     const viewModel = {participant: new User()};
     const avatarPreview = AssetRemoteData.v3();
+    window.devicePixelRatio = 1;
     viewModel.participant.previewPictureResource(avatarPreview);
 
     spyOn(avatarPreview, 'getObjectUrl').and.returnValue(Promise.resolve('/avatar'));
@@ -53,4 +54,26 @@ describe('participant-avatar', () => {
       });
     });
   });
+
+  it("loads user's medium avatar when element is visible for HiDPI", () => {
+    const viewModel = {participant: new User()};
+    const avatarPreview = AssetRemoteData.v3();
+    window.devicePixelRatio = 2;
+    viewModel.participant.mediumPictureResource(avatarPreview);
+
+    spyOn(avatarPreview, 'getObjectUrl').and.returnValue(Promise.resolve('/avatar'));
+
+    return instantiateComponent('participant-avatar', viewModel).then(domContainer => {
+      return new Promise(resolve => {
+        setTimeout(() => {
+          expect(avatarPreview.getObjectUrl).toHaveBeenCalled();
+
+          const imageElement = domContainer.querySelector('.avatar-image img');
+
+          expect(imageElement.src).toContain('/avatar');
+          resolve();
+        }, 20);
+      });
+    });
+  });
 });