simple automated qa test script

I am using [login to view URL] tool and i want to be able to search images on a page and verify all .svg, .png and .jpg and then i can determine if that information is correct. here is what i have so far: /// <reference types="Cypress" /> describe('SVG tests', function () { it('Verifies images are SVG', function () { // Arrange - setup initial app state [login to view URL]('/') [login to view URL]('img').debug() .then(function(image) { [login to view URL](image).invoke('attr','src').should('contain','.svg') }) }) })