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font-shorthand-serialization-prevention.html
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font-shorthand-serialization-prevention.html
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<!doctype html>
<meta charset="utf-8">
<title>CSS Test: font shorthand serialization prevention for font subproperty values the shorthand cannot express</title>
<link rel="help" href="https://drafts.csswg.org/css-fonts-4/#propdef-font">
<link rel="help" href="https://drafts.csswg.org/cssom-1/#serializing-css-values">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="test"></div>
<script>
function is_property_supported(property) {
const element = document.getElementById('test')
element.style = ''
element.style = property + ': initial'
return element.style[property] == 'initial'
}
function overwrite_font_shorthand(property, value) {
const element = document.getElementById('test')
element.style = ''
element.style.font = '16px serif'
element.style[property] = value
}
function test_font_shorthand_specified_serializable_after_setting_subproperty(property, value) {
test(() => {
overwrite_font_shorthand(property, value)
assert_not_equals(document.getElementById('test').style.font, '')
}, 'Setting ' + property + ' to ' + value + ' should not prevent the font shorthand from serializing in specified style')
}
function test_font_shorthand_computed_serializable_after_setting_subproperty(property, value) {
test(() => {
overwrite_font_shorthand(property, value)
assert_not_equals(getComputedStyle(document.getElementById('test')).font, '')
}, 'Setting ' + property + ' to ' + value + ' should not prevent the font shorthand from serializing in computed style')
}
function test_font_shorthand_specified_unserializable_after_setting_subproperty(property, value) {
test(() => {
overwrite_font_shorthand(property, value)
assert_equals(document.getElementById('test').style.font, '')
}, 'Setting ' + property + ' to ' + value + ' should prevent the font shorthand from serializing in specified style')
}
function test_font_shorthand_computed_unserializable_after_setting_subproperty(property, value) {
test(() => {
overwrite_font_shorthand(property, value)
assert_equals(getComputedStyle(document.getElementById('test')).font, '')
}, 'Setting ' + property + ' to ' + value + ' should prevent the font shorthand from serializing in computed style')
}
function test_font_shorthand_serializable_after_setting_subproperty(property, value) {
test_font_shorthand_specified_serializable_after_setting_subproperty(property, value)
test_font_shorthand_computed_serializable_after_setting_subproperty(property, value)
}
function test_font_shorthand_unserializable_after_setting_subproperty(property, value) {
test_font_shorthand_specified_unserializable_after_setting_subproperty(property, value)
test_font_shorthand_computed_unserializable_after_setting_subproperty(property, value)
}
function test_font_shorthand_serialization_after_setting_subproperty(property, defaultValue, otherValue) {
if (!is_property_supported(property))
return
const keywords = [ 'initial', 'inherit', 'unset', 'revert', 'revert-layer' ]
keywords.forEach(keyword => {
test_font_shorthand_specified_unserializable_after_setting_subproperty(property, keyword)
test_font_shorthand_computed_serializable_after_setting_subproperty(property, keyword)
});
test_font_shorthand_serializable_after_setting_subproperty(property, defaultValue)
test_font_shorthand_unserializable_after_setting_subproperty(property, otherValue)
}
test_font_shorthand_serializable_after_setting_subproperty('font-family', 'sans-serif')
test_font_shorthand_serialization_after_setting_subproperty('font-variant', 'normal', 'none')
test_font_shorthand_serializable_after_setting_subproperty('font-variant', 'small-caps')
test_font_shorthand_unserializable_after_setting_subproperty('font-variant', 'all-small-caps')
test_font_shorthand_serialization_after_setting_subproperty('font-variant-caps', 'small-caps', 'all-small-caps')
test_font_shorthand_serialization_after_setting_subproperty('font-stretch', 'normal', '95%')
test_font_shorthand_serialization_after_setting_subproperty('font-size-adjust', 'none', '0')
test_font_shorthand_serialization_after_setting_subproperty('font-kerning', 'auto', 'normal')
test_font_shorthand_serialization_after_setting_subproperty('font-variant-ligatures', 'normal', 'none')
test_font_shorthand_serialization_after_setting_subproperty('font-variant-position', 'normal', 'sub')
test_font_shorthand_serialization_after_setting_subproperty('font-variant-numeric', 'normal', 'ordinal')
test_font_shorthand_serialization_after_setting_subproperty('font-variant-alternates', 'normal', 'historical-forms')
test_font_shorthand_serialization_after_setting_subproperty('font-variant-east-asian', 'normal', 'full-width')
test_font_shorthand_serialization_after_setting_subproperty('font-variant-emoji', 'normal', 'text')
test_font_shorthand_serialization_after_setting_subproperty('font-feature-settings', 'normal', '"sinf"')
test_font_shorthand_serialization_after_setting_subproperty('font-language-override', 'normal', '"SRB"')
test_font_shorthand_serialization_after_setting_subproperty('font-optical-sizing', 'auto', 'none')
test_font_shorthand_serialization_after_setting_subproperty('font-variation-settings', 'normal', '"aaaa" 1')
</script>