Image Assertions
// Verify image
//storing image in a element var - use chrome dev tool right click extract xpath.
Element img = Find.ByXPath("//*[@id='4runner']/td[1]/div/img");
//Asserting that the stored image is of type image
Assert.IsTrue(image.ElementType == ElementType.Image);
//Asserting that stored image is not equal to null. If object is equal to null, throws AssertionException and displays string message
Assert.IsNotNull(image, "Does not exist on the page");
//Alternate null check without using Element image. Tested, works.
Assert.IsNotNull(Find.ByAttributes<HtmlImage>("src=~4Runner.png"), "Image is not on the page");