Apply comments.

tests/cypress/integration/actions_tasks_objects/case_19_all_image_rotate_features.js

@@ -23,6 +23,12 @@ context('Rotate all images feature.', () => {
         cy.get('#cvat_canvas_background').should('have.attr', 'style').and('contain', `rotate(${deg}deg);`);
     }
 
+    function checkFrameNum(frameNum) {
+        cy.get('.cvat-player-frame-selector').within(() => {
+            cy.get('input[role="spinbutton"]').should('have.value', frameNum);
+        });
+    }
+
     before(() => {
         cy.openTaskJob(taskName);
     });
@@ -36,6 +42,7 @@ context('Rotate all images feature.', () => {
 
         it("Go to the next frame. It wasn't rotated.", () => {
             cy.get('.cvat-player-next-button').click();
+            checkFrameNum(1);
             checkDegRotate(0);
         });
 
@@ -52,8 +59,10 @@ context('Rotate all images feature.', () => {
 
         it('Go to the previous and to the next frame. They are also rotated 180 deg.', () => {
             cy.get('.cvat-player-previous-button').click();
+            checkFrameNum(0);
             checkDegRotate(180);
             cy.get('.cvat-player-next-button').click();
+            checkFrameNum(1);
             checkDegRotate(180);
         });
     });