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