| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <link rel="author" title="Myles C. Maxfield" href="mmaxfield@apple.com"> |
| <link rel="help" href="https://drafts.csswg.org/css-font-loading-3/#dom-fontfaceset-add"> |
| <meta name="assert" content="Ensure that calling add() with a CSS-connected FontFace throws." /> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| @font-face { |
| font-family: "WebFont"; |
| src: url("resources/Rochester.otf") format("opentype"); |
| } |
| </style> |
| <script> |
| test(function(t) { |
| let font = document.fonts.keys().next().value; |
| let fontFaceSet = new FontFaceSet([]); |
| assert_equals(fontFaceSet.size, 0); |
| assert_throws_dom("InvalidModificationError", function() { fontFaceSet.add(font); }); |
| assert_equals(fontFaceSet.size, 0); |
| let newFont = new FontFace("MyFont", "url('resources/Rochester.otf')"); |
| fontFaceSet.add(newFont); |
| assert_equals(fontFaceSet.size, 1); |
| fontFaceSet.add(newFont); |
| assert_equals(fontFaceSet.size, 1); |
| }); |
| </script> |
| </html> |