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chromium/third_party/blink/web_tests/external/wpt/css/css-display/parsing/display-computed.html 

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Display: getComputedStyle().display</title>
<link rel="help" href="https://drafts.csswg.org/css2/visuren.html#display-prop">
<link rel="help" href="https://drafts.csswg.org/css-display/#the-display-properties">
<link rel="help" href="https://drafts.csswg.org/css-grid-1/#grid-containers">
<link rel="help" href="https://www.w3.org/TR/CSS2/visuren.html#dis-pos-flo">
<meta name="assert" content="position and float can change display computed value.">
<meta name="assert" content="display computed value is otherwise as specified.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
</head>
<body>
<div id="target"></div>
<script>
'use strict';

// https://drafts.csswg.org/css-grid-1/#grid-containers
test_computed_value("display", "grid");
test_computed_value("display", "inline-grid");

// https://drafts.csswg.org/css2/visuren.html#display-prop
test_computed_value("display", "inline");
test_computed_value("display", "block");
test_computed_value("display", "list-item");
test_computed_value("display", "inline-block");
test_computed_value("display", "table");
test_computed_value("display", "inline-table");
test_computed_value("display", "table-row-group");
test_computed_value("display", "table-header-group");
test_computed_value("display", "table-footer-group");
test_computed_value("display", "table-row");
test_computed_value("display", "table-column-group");
test_computed_value("display", "table-column");
test_computed_value("display", "table-cell");
test_computed_value("display", "table-caption");
test_computed_value("display", "none");

// https://drafts.csswg.org/css-flexbox-1/#flex-containers
test_computed_value("display", "flex");
test_computed_value("display", "inline-flex");

test_computed_value("display", "contents");

test_computed_value("display", "run-in");
test_computed_value("display", "flow", "block");
test_computed_value("display", "flow-root");
test_computed_value("display", "ruby");
test_computed_value("display", "ruby-base");
test_computed_value("display", "ruby-text");

test_computed_value("display", "flow list-item", "list-item");
test_computed_value("display", "list-item flow", "list-item");
test_computed_value("display", "flow-root list-item", "flow-root list-item");
test_computed_value("display", "list-item flow-root", "flow-root list-item");

test_computed_value("display", "block flow", "block");
test_computed_value("display", "flow block", "block");
test_computed_value("display", "flow-root block", "flow-root");
test_computed_value("display", "block flow-root", "flow-root");
test_computed_value("display", "flex block", "flex");
test_computed_value("display", "block flex", "flex");
test_computed_value("display", "grid block", "grid");
test_computed_value("display", "block grid", "grid");
test_computed_value("display", "table block", "table");
test_computed_value("display", "block table", "table");
test_computed_value("display", "block ruby", "block ruby");
test_computed_value("display", "ruby block", "block ruby");
test_computed_value("display", "block list-item", "list-item");
test_computed_value("display", "list-item block", "list-item");
test_computed_value("display", "flow block list-item", "list-item");
test_computed_value("display", "block flow list-item", "list-item");
test_computed_value("display", "flow list-item block", "list-item");
test_computed_value("display", "block list-item flow", "list-item");
test_computed_value("display", "list-item block flow", "list-item");
test_computed_value("display", "list-item flow block", "list-item");
test_computed_value("display", "flow-root block list-item", "flow-root list-item");
test_computed_value("display", "block flow-root list-item", "flow-root list-item");
test_computed_value("display", "flow-root list-item block", "flow-root list-item");
test_computed_value("display", "block list-item flow-root", "flow-root list-item");
test_computed_value("display", "list-item block flow-root", "flow-root list-item");
test_computed_value("display", "list-item flow-root block", "flow-root list-item");

test_computed_value("display", "inline flow", "inline");
test_computed_value("display", "flow inline", "inline");
test_computed_value("display", "flow-root inline", "inline-block");
test_computed_value("display", "inline flow-root", "inline-block");
test_computed_value("display", "flex inline", "inline-flex");
test_computed_value("display", "inline flex", "inline-flex");
test_computed_value("display", "grid inline", "inline-grid");
test_computed_value("display", "inline grid", "inline-grid");
test_computed_value("display", "table inline", "inline-table");
test_computed_value("display", "inline table", "inline-table");
test_computed_value("display", "inline ruby", "ruby");
test_computed_value("display", "ruby inline", "ruby");
test_computed_value("display", "inline list-item", "inline list-item");
test_computed_value("display", "list-item inline", "inline list-item");
test_computed_value("display", "flow inline list-item", "inline list-item");
test_computed_value("display", "inline flow list-item", "inline list-item");
test_computed_value("display", "flow list-item inline", "inline list-item");
test_computed_value("display", "inline list-item flow", "inline list-item");
test_computed_value("display", "list-item inline flow", "inline list-item");
test_computed_value("display", "list-item flow inline", "inline list-item");
test_computed_value("display", "flow-root inline list-item", "inline flow-root list-item");
test_computed_value("display", "inline flow-root list-item", "inline flow-root list-item");
test_computed_value("display", "flow-root list-item inline", "inline flow-root list-item");
test_computed_value("display", "inline list-item flow-root", "inline flow-root list-item");
test_computed_value("display", "list-item inline flow-root", "inline flow-root list-item");
test_computed_value("display", "list-item flow-root inline", "inline flow-root list-item");

test_computed_value("display", "run-in flow", "run-in");
test_computed_value("display", "flow run-in", "run-in");
test_computed_value("display", "flow-root run-in", "run-in flow-root");
test_computed_value("display", "run-in flow-root", "run-in flow-root");
test_computed_value("display", "flex run-in", "run-in flex");
test_computed_value("display", "run-in flex", "run-in flex");
test_computed_value("display", "grid run-in", "run-in grid");
test_computed_value("display", "run-in grid", "run-in grid");
test_computed_value("display", "table run-in", "run-in table");
test_computed_value("display", "run-in table", "run-in table");
test_computed_value("display", "run-in ruby", "run-in ruby");
test_computed_value("display", "ruby run-in", "run-in ruby");
test_computed_value("display", "run-in list-item", "run-in list-item");
test_computed_value("display", "list-item run-in", "run-in list-item");
test_computed_value("display", "flow run-in list-item", "run-in list-item");
test_computed_value("display", "run-in flow list-item", "run-in list-item");
test_computed_value("display", "flow list-item run-in", "run-in list-item");
test_computed_value("display", "run-in list-item flow", "run-in list-item");
test_computed_value("display", "list-item run-in flow", "run-in list-item");
test_computed_value("display", "list-item flow run-in", "run-in list-item");
test_computed_value("display", "flow-root run-in list-item", "run-in flow-root list-item");
test_computed_value("display", "run-in flow-root list-item", "run-in flow-root list-item");
test_computed_value("display", "flow-root list-item run-in", "run-in flow-root list-item");
test_computed_value("display", "run-in list-item flow-root", "run-in flow-root list-item");
test_computed_value("display", "list-item run-in flow-root", "run-in flow-root list-item");
test_computed_value("display", "list-item flow-root run-in", "run-in flow-root list-item");

// https://www.w3.org/TR/CSS2/visuren.html#dis-pos-flo
function test_display_affected(property, value) {
  const target = document.getElementById('target');
  test(() => {
    target.style[property] = value;
    target.style.display = 'inline-table';
    assert_equals(getComputedStyle(target).display, 'table', 'inline-table -> block');

    const displayValues = [
      'inline',
      'table-row-group',
      'table-column',
      'table-column-group',
      'table-header-group',
      'table-footer-group',
      'table-row',
      'table-cell',
      'table-caption',
      'ruby-base',
      'ruby-text',
      'inline-block'
    ];

    for (let displayValue of displayValues) {
      target.style.display = displayValue;
      assert_equals(getComputedStyle(target).display, 'block', displayValue + ' -> block');
    }

    target.style.display = 'inline-flex';
    assert_equals(getComputedStyle(target).display, 'flex', 'inline-flex -> flex');

    target.style.display = 'inline-grid';
    assert_equals(getComputedStyle(target).display, 'grid', 'inline-grid -> grid');

    // Other values are not affected.
    target.style.display = 'list-item';
    assert_equals(getComputedStyle(target).display, 'list-item', 'list-item -> list-item');

    target.style.display = 'contents';
    assert_equals(getComputedStyle(target).display, 'contents', 'contents -> contents');

    target.style[property] = '';
    target.style.display = '';
  }, property + ' ' + value + ' affects computed display');
}

test_display_affected("position", "absolute");
test_display_affected("position", "fixed");
test_display_affected("float", "left");
test_display_affected("float", "right");
</script>
</body>
</html>