| <!DOCTYPE HTML> |
| <title>DOM Image constructor Test</title> |
| <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/#the-img-element" /> |
| <meta name="assert" content="Tests the Image constructor for the img-element"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| |
| <div id="log"></div> |
| <script> |
| test(function() { |
| var img = new Image(); |
| assert_true(img != undefined); |
| }, "Image constructor works"); |
| |
| test(function() { |
| assert_equals(Image.prototype, HTMLImageElement.prototype); |
| }, "Image and HTMLImageElement share a prototype"); |
| |
| test(function() { |
| assert_true((new Image()).localName === "img"); |
| }, "Image localName is img"); |
| |
| test(function() { |
| assert_true((new Image()).namespaceURI === "http://www.w3.org/1999/xhtml"); |
| }, "Image namespace URI is correct"); |
| |
| test(function() { |
| assert_equals(Image.name, "Image", "Image name should be Image (not HTMLImageElement)"); |
| assert_equals(Object.getPrototypeOf(Image), Function.prototype, "Image's prototype is Function.prototype"); |
| assert_equals(Image.prototype, HTMLImageElement.prototype, "Image.prototype is same as HTMLImageElement.prototype"); |
| assert_equals(Object.getPrototypeOf(new Image()), HTMLImageElement.prototype, "new Image()'s prototype is HTMLImageElement.prototype "); |
| assert_equals(Object.getPrototypeOf(Image.prototype), HTMLElement.prototype, "Image.prototype's prototype is HTMLElement.prototype"); |
| |
| const desc = Object.getOwnPropertyDescriptor(Image, "prototype"); |
| assert_false(desc.configurable, "Image.prototype is not configurable"); |
| assert_false(desc.enumerable, "Image.prototype is not enumerable"); |
| assert_false(desc.writable, "Image.prototype is not writable"); |
| }, "NamedConstructor creates the correct object structure."); |
| |
| </script> |
