<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Backgrounds and Borders: getComputedStyle().background with multiple layers</title>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#background">
<meta name="assert" content="The number of layers is determined by the number of comma-separated values in the background-image property. .">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
<style>
  #target {
    background-image: none, none, none;
    font-size: 40px;
  }
</style>
</head>
<body>
<div id="target"></div>
<script>
test_computed_value("background-attachment", "local", "local, local, local");
test_computed_value("background-attachment", "scroll, fixed", "scroll, fixed, scroll");
test_computed_value("background-attachment", "local, fixed, scroll");
test_computed_value("background-attachment", "local, fixed, scroll, fixed", "local, fixed, scroll");

test_computed_value("background-clip", "border-box", "border-box, border-box, border-box");
test_computed_value("background-clip", "content-box, border-box", "content-box, border-box, content-box");
test_computed_value("background-clip", "border-box, padding-box, content-box");
test_computed_value("background-clip", "content-box, border-box, padding-box, content-box", "content-box, border-box, padding-box");

// background-color always computes as a single color.
test_computed_value("background-color", "rgb(255, 0, 0)");

test_computed_value("background-origin", "border-box", "border-box, border-box, border-box");
test_computed_value("background-origin", "content-box, border-box", "content-box, border-box, content-box");
test_computed_value("background-origin", "border-box, padding-box, content-box");
test_computed_value("background-origin", "content-box, border-box, padding-box, content-box", "content-box, border-box, padding-box");

test_computed_value("background-position", "50% 6px", "50% 6px, 50% 6px, 50% 6px");
test_computed_value("background-position", "12px 13px, 50% 6px", "12px 13px, 50% 6px, 12px 13px");
test_computed_value("background-position", "12px 13px, 50% 6px, 30px -10px");
test_computed_value("background-position", "12px 13px, 50% 6px, 30px -10px, -7px 8px", "12px 13px, 50% 6px, 30px -10px");

test_computed_value("background-position-x", "0.5em", "20px, 20px, 20px");
test_computed_value("background-position-x", "-20%, 10px", "-20%, 10px, -20%");

test_computed_value("background-position-x", "center, left, right", "50%, 0%, 100%");
test_computed_value("background-position-x", "calc(10px - 0.5em), -20%, right, 15%", "-10px, -20%, 100%");

test_computed_value("background-position-y", "0.5em", "20px, 20px, 20px");
test_computed_value("background-position-y", "-20%, 10px", "-20%, 10px, -20%");
test_computed_value("background-position-y", "center, top, bottom", "50%, 0%, 100%");
test_computed_value("background-position-y", "calc(10px - 0.5em), -20%, bottom, 15%", "-10px, -20%, 100%");

test_computed_value("background-repeat", "round", "round, round, round");
test_computed_value("background-repeat", "repeat-x, repeat", "repeat-x, repeat, repeat-x");
test_computed_value("background-repeat", "repeat space, round no-repeat, repeat-x");
test_computed_value("background-repeat", "repeat-y, round no-repeat, repeat-x, repeat", "repeat-y, round no-repeat, repeat-x");

test_computed_value("background-size", "contain", "contain, contain, contain");
test_computed_value("background-size", "auto 1px, 2% 3%", "auto 1px, 2% 3%, auto 1px");
test_computed_value("background-size", "auto 1px, 2% 3%, contain");
test_computed_value("background-size", "auto 1px, 2% 3%, contain, 7px 8px", "auto 1px, 2% 3%, contain");

// Open issue: Define serialization for background shorthand
// https://github.com/w3c/csswg-drafts/issues/418
// test_computed_value("background", "rgb(1, 2, 3) none 4px 5px / 6px 7px repeat space scroll border-box padding-box");
</script>
</body>
</html>
