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<!DOCTYPE html>
<meta charset="utf-8">
<title>Tests that getComputedStyle() returns auto insets and margins 0 when position-area or anchor-center is used with valid default anchor</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#position-area">
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#anchor-pos">
<link rel="author" name="David Shin" href="mailto:dshin@mozilla.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.abs-cb {
width: 60px;
height: 60px;
border: 5px solid;
position: relative;
anchor-scope: all;
display: inline-block;
/* Nudge static position against padding box. */
padding: 10px;
}
.anchor {
anchor-name: --a;
position: absolute;
left: 20px;
top: 20px;
width: 20px;
height: 20px;
background: pink;
}
.positioned {
position: absolute;
background: purple;
width: 20px;
height: 20px;
}
.margin-auto > .positioned {
inset: 0;
margin: auto;
}
.inset-auto > .positioned {
inset: auto;
}
.pa {
position-area: bottom right;
}
.jac {
justify-self: anchor-center;
}
.aac {
align-self: anchor-center;
}
.valid-anchor > .positioned {
position-anchor: --a;
}
</style>
<div id=insetValidAnchor class="abs-cb inset-auto valid-anchor">
<div class=anchor></div>
<div class="positioned pa"></div>
<div class="positioned jac"></div>
<div class="positioned aac"></div>
</div
><div id=insetInvalidAnchor class="abs-cb inset-auto">
<div class=anchor></div>
<div class="positioned pa"></div>
<div class="positioned jac"></div>
<div class="positioned aac"></div>
</div><br>
<div id=marginValidAnchor class="abs-cb margin-auto valid-anchor">
<div class=anchor></div>
<div class="positioned pa"></div>
<div class="positioned jac"></div>
<div class="positioned aac"></div>
</div
><div id=marginInvalidAnchor class="abs-cb margin-auto">
<div class=anchor></div>
<div class="positioned pa"></div>
<div class="positioned jac"></div>
<div class="positioned aac"></div>
</div>
<script>
function assert_zero(e, f, props, t) {
test(() => {
const s = getComputedStyle(e);
for (const prop of props) {
f(s.getPropertyValue(prop), "0px");
}
}, t);
}
const horizontalInsets = ['left', 'right'];
const verticalInsets = ['top', 'bottom'];
const allInsets = horizontalInsets.concat(verticalInsets);
assert_zero(insetValidAnchor.querySelector('.pa'), assert_equals, allInsets, "position-area with valid anchor sets insets to zero");
assert_zero(insetValidAnchor.querySelector('.jac'), assert_equals, horizontalInsets, "justify-self: anchor-center with valid anchor sets insets to zero");
assert_zero(insetValidAnchor.querySelector('.aac'), assert_equals, verticalInsets, "align-self: anchor-center with valid anchor sets insets to zero");
assert_zero(insetInvalidAnchor.querySelector('.pa'), assert_not_equals, allInsets, "position-area with invalid anchor does not set insets to zero");
assert_zero(insetInvalidAnchor.querySelector('.jac'), assert_not_equals, horizontalInsets, "justify-self: anchor-center with invalid anchor does not set insets to zero");
assert_zero(insetInvalidAnchor.querySelector('.aac'), assert_not_equals, verticalInsets, "align-self: anchor-center with invalid anchor does not set insets to zero");
const horizontalMargins = ['margin-left', 'margin-right'];
const verticalMargins = ['margin-top', 'margin-bottom'];
const allMargins = horizontalMargins.concat(verticalMargins);
assert_zero(marginValidAnchor.querySelector('.pa'), assert_equals, allMargins, "position-area with valid anchor sets margins to zero");
assert_zero(marginValidAnchor.querySelector('.jac'), assert_equals, horizontalMargins, "justify-self: anchor-center with valid anchor sets margins to zero");
assert_zero(marginValidAnchor.querySelector('.aac'), assert_equals, verticalMargins, "align-self: anchor-center with valid anchor sets margins to zero");
assert_zero(marginInvalidAnchor.querySelector('.pa'), assert_not_equals, allMargins, "position-area with invalid anchor does not set margins to zero");
assert_zero(marginInvalidAnchor.querySelector('.jac'), assert_not_equals, horizontalMargins, "justify-self: anchor-center with invalid anchor does not set margins to zero");
assert_zero(marginInvalidAnchor.querySelector('.aac'), assert_not_equals, verticalMargins, "align-self: anchor-center with invalid anchor does not set margins to zero");
</script>
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