<!doctype html>
<meta charset="utf-8">
<title>CSS Test: font shorthand serialization with font-stretch values</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" style="font: medium serif"></div>
<script>
test(function() {
    const div = document.getElementById("test");
    div.style.fontStretch = "50%";
    assert_equals(div.style.font, "ultra-condensed medium serif");
    div.style.fontStretch = "62.5%";
    assert_equals(div.style.font, "extra-condensed medium serif");
    div.style.fontStretch = "75%";
    assert_equals(div.style.font, "condensed medium serif");
    div.style.fontStretch = "87.5%";
    assert_equals(div.style.font, "semi-condensed medium serif");
    div.style.fontStretch = "100%";
    assert_equals(div.style.font, "medium serif", "The keyword normal should be omitted");
    div.style.fontStretch = "112.5%";
    assert_equals(div.style.font, "semi-expanded medium serif");
    div.style.fontStretch = "125%";
    assert_equals(div.style.font, "expanded medium serif");
    div.style.fontStretch = "150%";
    assert_equals(div.style.font, "extra-expanded medium serif");
    div.style.fontStretch = "200%";
    assert_equals(div.style.font, "ultra-expanded medium serif");
}, "Percentages which can be transformed into keywords should be for serialization");

test(function() {
    const div = document.getElementById("test");
    div.style.fontStretch = "25%";
    assert_equals(div.style.font, "");
    div.style.fontStretch = "101%";
    assert_equals(div.style.font, "");
}, "Percentages which cannot be transformed into keywords should prevent the font shorthand from serializing");
</script>