normalize-image.html

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This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-typed-om/stylevalue-normalization/normalize-image.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>CSSImageValue normalization tests</title>

<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#resourcevalue-normalization">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="../resources/testhelper.js"></script>

<body>

<script>

'use strict';

const gTestUrl = '/media/1x1-green.png';

const gBadTestUrl = document.location.href;

test(t => {

  const result = CSSStyleValue.parse('background-image', 'url("' + gTestUrl + '")');

  assert_class_string(result, 'CSSImageValue');

}, 'Normalizing a valid <url> returns a CSSImageValue');

test(t => {

  const result = CSSStyleValue.parse('background-image', 'url("' + gBadTestUrl + '")');

  assert_class_string(result, 'CSSImageValue');

}, 'Normalizing a bad <url> returns a CSSImageValue');

test(t => {

  const result = CSSStyleValue.parse('background-image', 'linear-gradient(red, orange)');

  assert_equals(result.constructor.name, 'CSSImageValue');

}, 'Normalizing a <gradient> returns a CSSImageValue');

</script>