layout/style/test/test_computed_style.html
author Byron Campen <docfaraday@gmail.com>
Mon, 20 Sep 2021 16:45:53 +0000
changeset 592504 20b482455364fc14118bd32de96ae52cc81c7f3a
parent 583094 1fb8a83a1be061b094238b0e63e057a6738f8f17
permissions -rw-r--r--
Bug 1651268: Make sure the pre-run code for FindExpirationTime waits for timers to fire on all threads. r=xpcom-reviewers,nika Differential Revision: https://phabricator.services.mozilla.com/D125603

<!DOCTYPE HTML>
<html>
<head>
  <title>Test for miscellaneous computed style issues</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <style id="style"></style>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">

/** Test for miscellaneous computed style issues **/

var frame_container = document.getElementById("display");
var noframe_container = document.getElementById("content");

(function test_bug_595650() {
  // Test handling of horizontal and vertical percentages for border-radius.
  var p = document.createElement("p");
  p.setAttribute("style", "width: 256px; height: 128px");
  p.style.borderTopLeftRadius = "1.5625%"; /* 1/64 == 4px 2px */
  p.style.borderTopRightRadius = "5px";
  p.style.borderBottomRightRadius = "5px 3px";
  p.style.borderBottomLeftRadius = "1.5625% 3.125%" /* 1/64 1/32 == 4px 4px */
  var cs = getComputedStyle(p, "");

  frame_container.appendChild(p);
  is(cs.borderTopLeftRadius, "1.5625%",
     "computed value of % border-radius, with frame");
  is(cs.borderTopRightRadius, "5px",
     "computed value of px border-radius, with frame");
  is(cs.borderBottomRightRadius, "5px 3px",
     "computed value of px border-radius, with frame");
  is(cs.borderBottomLeftRadius, "1.5625% 3.125%",
     "computed value of % border-radius, with frame");

  noframe_container.appendChild(p);
  is(cs.borderTopLeftRadius, "1.5625%",
     "computed value of % border-radius, without frame");
  is(cs.borderTopRightRadius, "5px",
     "computed value of px border-radius, without frame");
  is(cs.borderBottomRightRadius, "5px 3px",
     "computed value of px border-radius, without frame");
  is(cs.borderBottomLeftRadius, "1.5625% 3.125%",
     "computed value of % border-radius, without frame");

  p.remove();
})();

(function test_bug_1292447() {
  // Was for bug 595651 which tests that clamping of border-radius
  // is reflected in computed style.
  // For compatibility issue, resolved value is computed value now.
  var p = document.createElement("p");
  p.setAttribute("style", "width: 190px; height: 90px; border: 5px solid;");
  p.style.borderRadius = "1000px";
  var cs = getComputedStyle(p, "");

  frame_container.appendChild(p);
  is(cs.borderTopLeftRadius, "1000px",
     "computed value of clamped border radius (top left)");
  is(cs.borderTopRightRadius, "1000px",
     "computed value of clamped border radius (top right)");
  is(cs.borderBottomRightRadius, "1000px",
     "computed value of clamped border radius (bottom right)");
  is(cs.borderBottomLeftRadius, "1000px",
     "computed value of clamped border radius (bottom left)");

  p.style.overflowY = "scroll";
  is(cs.borderTopLeftRadius, "1000px",
     "computed value of clamped border radius (top left, overflow-y)");
  // Fennec doesn't have scrollbars for overflow:scroll content
  if (p.clientWidth == p.offsetWidth - 10) {
    is(cs.borderTopRightRadius, "1000px",
       "computed value of border radius (top right, overflow-y)");
    is(cs.borderBottomRightRadius, "1000px",
       "computed value of border radius (bottom right, overflow-y)");
  } else {
    is(cs.borderTopRightRadius, "1000px",
       "computed value of clamped border radius (top right, overflow-y)");
    is(cs.borderBottomRightRadius, "1000px",
       "computed value of clamped border radius (bottom right, overflow-y)");
  }
  is(cs.borderBottomLeftRadius, "1000px",
     "computed value of clamped border radius (bottom left, overflow-y)");

  p.style.overflowY = "hidden";
  p.style.overflowX = "scroll";
  is(cs.borderTopLeftRadius, "1000px",
     "computed value of clamped border radius (top left, overflow-x)");
  is(cs.borderTopRightRadius, "1000px",
     "computed value of clamped border radius (top right, overflow-x)");
  // Fennec doesn't have scrollbars for overflow:scroll content
  if (p.clientHeight == p.offsetHeight - 10) {
    is(cs.borderBottomRightRadius, "1000px",
       "computed value of border radius (bottom right, overflow-x)");
    is(cs.borderBottomLeftRadius, "1000px",
       "computed value of  border radius (bottom left, overflow-x)");
  } else {
    is(cs.borderBottomRightRadius, "1000px",
       "computed value of clamped border radius (bottom right, overflow-x)");
    is(cs.borderBottomLeftRadius, "1000px",
       "computed value of clamped border radius (bottom left, overflow-x)");
  }

  p.remove();
})();

(function test_bug_647885_1() {
  // Test that various background-position styles round-trip correctly
  var backgroundPositions = [
    [ "0 0", "0px 0px", "unitless 0" ],
    [ "0px 0px", "0px 0px", "0 with units" ],
    [ "0% 0%", "0% 0%", "0%" ],
    [ "calc(0px) 0", "0px 0px", "0 calc with units x" ],
    [ "0 calc(0px)", "0px 0px", "0 calc with units y" ],
    [ "calc(3px - 3px) 0", "0px 0px", "computed 0 calc with units x" ],
    [ "0 calc(3px - 3px)", "0px 0px", "computed 0 calc with units y" ],
    [ "calc(0%) 0", "0% 0px", "0% calc x"],
    [ "0 calc(0%)", "0px 0%", "0% calc y"],
    [ "calc(3px + 2% - 2%) 0", "calc(0% + 3px) 0px",
      "computed 0% calc x"],
    [ "0 calc(3px + 2% - 2%)", "0px calc(0% + 3px)",
      "computed 0% calc y"],
    [ "calc(3px - 5px) calc(6px - 7px)", "-2px -1px",
      "negative pixel width"],
    [ "", "0% 0%", "initial value" ],
  ];

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (var i = 0; i < backgroundPositions.length; ++i) {
    var test = backgroundPositions[i];
    p.style.backgroundPosition = test[0];
    is(cs.backgroundPosition, test[1], "computed value of " + test[2] + " background-position");
  }

  p.remove();
})();

(function test_bug_647885_2() {
  // Test that various background-size styles round-trip correctly
  var backgroundSizes = [
    [ "0 0", "0px 0px", "unitless 0" ],
    [ "0px 0px", "0px 0px", "0 with units" ],
    [ "0% 0%", "0% 0%", "0%" ],
    [ "calc(0px) 0", "0px 0px", "0 calc with units horizontal" ],
    [ "0 calc(0px)", "0px 0px", "0 calc with units vertical" ],
    [ "calc(3px - 3px) 0", "0px 0px", "computed 0 calc with units horizontal" ],
    [ "0 calc(3px - 3px)", "0px 0px", "computed 0 calc with units vertical" ],
    [ "calc(0%) 0", "0% 0px", "0% calc horizontal"],
    [ "0 calc(0%)", "0px 0%", "0% calc vertical"],
    [ "calc(3px + 2% - 2%) 0", "calc(0% + 3px) 0px",
                      "computed 0% calc horizontal"],
    [ "0 calc(3px + 2% - 2%)", "0px calc(0% + 3px)",
                      "computed 0% calc vertical"],
    [ "calc(3px - 5px) calc(6px - 9px)", "0px 0px", "negative pixel width" ],
    [ "", "auto", "initial value" ],
  ];

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (var i = 0; i < backgroundSizes.length; ++i) {
    var test = backgroundSizes[i];
    p.style.backgroundSize = test[0];
    is(cs.backgroundSize, test[1], "computed value of " + test[2] + " background-size");
  }

  p.remove();
})();

(function test_bug_716628() {
  // Test that various gradient styles round-trip correctly
  var backgroundImages = [
    [ "radial-gradient(at 10% bottom, #ffffff, black)",
      "radial-gradient(at 10% 100%, rgb(255, 255, 255), rgb(0, 0, 0))",
      "radial gradient 1" ],
    [ "radial-gradient(#ffffff, black)",
      "radial-gradient(rgb(255, 255, 255), rgb(0, 0, 0))",
      "radial gradient 2" ],
    [ "radial-gradient(farthest-corner, #ffffff, black)",
      "radial-gradient(rgb(255, 255, 255), rgb(0, 0, 0))",
      "radial gradient 3" ],
    [ "linear-gradient(red, blue)",
      "linear-gradient(rgb(255, 0, 0), rgb(0, 0, 255))",
      "linear gradient 1" ],
    [ "linear-gradient(to bottom, red, blue)",
      "linear-gradient(rgb(255, 0, 0), rgb(0, 0, 255))",
      "linear gradient 2" ],
    [ "linear-gradient(to right, red, blue)",
      "linear-gradient(to right, rgb(255, 0, 0), rgb(0, 0, 255))",
      "linear gradient 3" ],
    [ "linear-gradient(-45deg, red, blue)",
      "linear-gradient(-45deg, rgb(255, 0, 0), rgb(0, 0, 255))",
      "linear gradient with angle in degrees" ],
    [ "linear-gradient(-0.125turn, red, blue)",
      "linear-gradient(-45deg, rgb(255, 0, 0), rgb(0, 0, 255))",
      "linear gradient with angle in turns" ],
  ];

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (var i = 0; i < backgroundImages.length; ++i) {
    var test = backgroundImages[i];
    p.style.backgroundImage = test[0];
    is(cs.backgroundImage, test[1], "computed value of " + test[2] + " background-image");
  }

  p.remove();
})();

(function test_bug_1235015() {
  // "masks" object contains non-initial mask longhand values.
  var emptyMasks = {
    // More then one <mask-reference>, or any mask-image value other then
    // <mask-source>,
    "mask-image": [
      "url(#mask1), url(#mask2)",
      "linear-gradient(red, yellow)",
      "-moz-element(#test)"
    ],
    // any mask-clip value other than "border-box".
    "mask-clip": [
      "content-box", "padding-box", "margin-box", "fill-box", "stroke-box",
      "view-box", "no-clip"
    ],
    // any mask-origin  value other than "border-box".
    "mask-origin": [
      "content-box", "padding-box", "margin-box", "fill-box", "stroke-box",
      "view-box"
    ],
    // any mask-composite value other than "add".
    "mask-composite": [
      "subtract", "intersect", "exclude"
    ],
    // any mask-mode value other than "match-source".
    "mask-mode": [
      "alpha", "luminance"
    ],
    // any mask-position value other then "0%" "top" "left"
    // "center center".
    "mask-position": [
      "0%", "center", "right", "bottom", "50%", "100%"
    ],
    // any mask-repeat value other then "repeat" "repeat repeat".
    "mask-repeat": [
      "repeat-x", "repeat-y", "no-repeat", "space", "round"
    ],
    // any mask-size value other then "auto" "auto auto".
    "mask-size": [
      "10px", "100%", "cover", "contain", "auto 5px"
    ],
  };

  // "masks" object contains initial mask longhand values.
  var nonEmptyMasks = {
    "mask-image": [
      "url(#mask1)", "none"
    ],
    "mask-clip": [
      "border-box"
    ],
    "mask-origin": [
      "border-box"
    ],
    "mask-composite": [
      "add"
    ],
    "mask-mode": [
      "match-source"
    ],
    "mask-position": [
      "0% 0%", "left top"
    ],
    "mask-repeat": [
      "repeat", "repeat repeat"
    ],
    "mask-size": [
      "auto", "auto auto"
    ],
  };

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (var prop in emptyMasks) {
    var subProp = emptyMasks[prop];
    for (var i = 0; i < subProp.length; i++) {
      p.style.mask = subProp[i];
      is(cs.mask, "", "computed value of " + subProp[i] + " mask");
    }
  }

  for (var prop in nonEmptyMasks) {
    var subProp = nonEmptyMasks[prop];
    for (var i = 0; i < subProp.length; i++) {
      p.style.mask = subProp[i];
      isnot(cs.mask, "", "computed value of " + subProp[i] + " mask");
    }
  }
  p.remove();
})();

(function test_bug_1363349_linear() {
  const specPrefix = "-webkit-gradient(linear, ";
  const specSuffix = ", from(blue), to(lime))";

  const expPrefix = "linear-gradient(";
  const expSuffix = "rgb(0, 0, 255) 0%, rgb(0, 255, 0) 100%)";

  let testcases = [
    [ "calc(5 + 5) top, calc(10 + 10) top",
      "to right",
      "calc(num+num) in position"
    ],
    [ "left calc(25% - 10%), right calc(75% + 10%)",
      "to right bottom",
      "calc(pct+pct) in position "
    ]
  ];

  let p = document.createElement("p");
  let cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (let test of testcases) {
    let specifiedStyle = specPrefix + test[0] + specSuffix;
    let expectedStyle = expPrefix;
    if (test[1] != "") {
      expectedStyle += test[1] + ", ";
    }
    expectedStyle += expSuffix;

    p.style.backgroundImage = specifiedStyle;
    is(cs.backgroundImage, expectedStyle,
       "computed value of -webkit-gradient expression (" + test[2] + ")");
    p.style.backgroundImage = "";
  }

  p.remove();
})();

(function test_bug_1363349_radial() {
  const specPrefix = "-webkit-gradient(radial, ";
  const specSuffix = ", from(blue), to(lime))";

  const expPrefix = "radial-gradient(";
  const expSuffix = "rgb(0, 0, 255) 0%, rgb(0, 255, 0) 100%)";

  let testcases = [
    [ "1 2, 0, 3 4, calc(1 + 5)",
      "6px at 3px 4px",
      "calc(num+num) in radius"
    ],
    [ "1 2, calc(1 + 2), 3 4, calc(1 + 5)",
      "6px at 3px 4px",
      "calc(num+num) in radius"
    ],
    [ "calc(0 + 1) calc(1 + 1), calc(1 + 2), calc(1 + 2) 4, calc(1 + 5)",
      "6px at 3px 4px",
      "calc(num+num) in position and radius"
    ]
  ];

  let p = document.createElement("p");
  let cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (let test of testcases) {
    let specifiedStyle = specPrefix + test[0] + specSuffix;
    let expectedStyle = expPrefix;
    if (test[1] != "") {
      expectedStyle += test[1] + ", ";
    }
    expectedStyle += expSuffix;

    p.style.backgroundImage = specifiedStyle;
    is(cs.backgroundImage, expectedStyle,
       "computed value of -webkit-gradient expression (" + test[2] + ")");
    p.style.backgroundImage = "";
  }

  p.remove();
})();

(function test_bug_1241623() {
  // Test that -webkit-gradient() styles are approximated the way we expect:

  // For compactness, we'll pull out the common prefix & suffix from all of the
  // specified & expected styles, and construct the full expression on the fly:
  const specPrefix = "-webkit-gradient(linear, ";
  const specSuffix = ", from(blue), to(lime))";

  const expPrefix = "linear-gradient(";
  const expSuffix = "rgb(0, 0, 255) 0%, rgb(0, 255, 0) 100%)";

  let testcases = [
    //
    // [ legacyDirection,
    //   modernDirection, // (empty string means use default direction)
    //   descriptionOfTestcase ],

    // If start & end are at same point, we just produce a gradient with
    // the default direction.
    [ "left top, left top",
      "",
      "start & end point are the same" ],
    [ "40 40, 40 40",
      "",
      "start & end point are the same" ],
    [ "center center, center center",
      "",
      "start & end point are the same" ],

    // If start & end use different units in the same coordinate, we generally
    // can't extract a direction (because we can't know whether arbitrary
    // percent values are larger or smaller than arbitrary pixel values). So
    // we produce a gradient in the default direction.
    [ "left top, 30 100%",  // (Note: keywords like "left" are really % vals.)
      "",
      "start & end point have different units" ],
    [ "100% 15, right bottom",
      "",
      "start & end point have different units" ],
    [ "0 0%, 20 20",
      "",
      "start & end point have different units" ],
    [ "0 0, 100% 20",
      "",
      "start & end point have different units" ],
    [ "5% 30, 20 50%",
      "",
      "start & end point have different units" ],
    [ "5% 6%, 20 30",
      "",
      "start & end point have different units" ],

    // Gradient starting/ending somewhere arbitrary in middle:
    [ "center center, right top",
      "to right top",
      "from center to right top" ],
    [ "left top, center center",
      "to right bottom",
      "from left top to center" ],
    [ "10 15, 5 20",
      "to left bottom",
      "from arbitrary point to another point in lower-left direction" ],

    // Gradient using negative coordinates:
    [ "-10 -15, 0 0",
      "to right bottom",
      "from negative point to origin" ],
    [ "-100 10, 20 30",
      "to right bottom",
      "from negative-x point to another point in lower-right direction" ],
    [ "10 -100, 5 10",
      "to left bottom",
      "from negative-y point to another point in lower-left direction" ],

    // Diagonal gradient between sides/corners:
    [ "center top, left center",
      "to left bottom",
      "left/bottom-wards, using edge keywords" ],
    [ "left center, center top",
      "to right top",
      "top/right-wards, using edge keywords" ],
    [ "right center, center top",
      "to left top",
      "top/left-wards, using edge keywords" ],
    [ "right top, center bottom",
      "to left bottom",
      "bottom/left-wards, using edge keywords" ],
    [ "left top, right bottom",
      "to right bottom",
      "bottom/right-wards, using edge keywords" ],
    [ "left bottom, right top",
      "to right top",
      "top/right-wards, using edge keywords" ],
  ];

  let p = document.createElement("p");
  let cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (let test of testcases) {
    let specifiedStyle = specPrefix + test[0] + specSuffix;
    let expectedStyle = expPrefix;
    if (test[1] != "") {
      expectedStyle += test[1] + ", ";
    }
    expectedStyle += expSuffix;

    p.style.backgroundImage = specifiedStyle;
    is(cs.backgroundImage, expectedStyle,
       "computed value of -webkit-gradient expression (" + test[2] + ")");
    p.style.backgroundImage = "";
  }

  p.remove();
})();

(function test_bug_1293164() {

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  var docPath = document.URL.substring(0, document.URL.lastIndexOf("/") + 1);

  var localURL = "url(\"#foo\")";
  var nonLocalURL = "url(\"foo.svg#foo\")";
  var resolvedNonLocalURL = "url(\"" + docPath + "foo.svg#foo\")";

  var testStyles = [
    "mask",
    "markerStart",
    "markerMid",
    "markerEnd",
    "clipPath",
    "filter",
    "fill",
    "stroke",
  ];

  for (var prop of testStyles) {
    p.style[prop] = localURL;
    is(cs[prop], localURL, "computed value of " + prop);
    p.style[prop] = nonLocalURL;
    is(cs[prop], resolvedNonLocalURL, "computed value of " + prop);
  }

  p.remove();
})();

(function test_bug_1347164() {
  // Test that computed color values are serialized as "rgb()"
  // IFF they're fully-opaque (and otherwise as "rgba()").
  var color = [
    ["rgba(0, 0, 0, 1)", "rgb(0, 0, 0)"],
    ["rgba(0, 0, 0, 0.5)", "rgba(0, 0, 0, 0.5)"],
    ["hsla(0, 0%, 0%, 1)", "rgb(0, 0, 0)"],
    ["hsla(0, 0%, 0%, 0.5)", "rgba(0, 0, 0, 0.5)"],
  ];

  var css_color_4 = [
    ["rgba(0 0 0 / 1)", "rgb(0, 0, 0)"],
    ["rgba(0 0 0 / 0.1)", "rgba(0, 0, 0, 0.1)"],
    ["rgb(0 0 0 / 1)", "rgb(0, 0, 0)"],
    ["rgb(0 0 0 / 0.2)", "rgba(0, 0, 0, 0.2)"],
    ["hsla(0 0% 0% / 1)", "rgb(0, 0, 0)"],
    ["hsla(0deg 0% 0% / 0.3)", "rgba(0, 0, 0, 0.3)"],
    ["hsl(0 0% 0% / 1)", "rgb(0, 0, 0)"],
    ["hsl(0 0% 0% / 0.4)", "rgba(0, 0, 0, 0.4)"],
  ];

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (var i = 0; i < color.length; ++i) {
    var test = color[i];
    p.style.color = test[0];
    is(cs.color, test[1], "computed value of " + test[0]);
  }
  for (var i = 0; i < css_color_4.length; ++i) {
    var test = css_color_4[i];
    p.style.color = test[0];
    is(cs.color, test[1], "css-color-4 computed value of " + test[0]);
  }

  p.remove();
})();

(function test_bug_1357117() {
  // Test that vendor-prefixed gradient styles round-trip with the same prefix,
  // or with no prefix.
  var backgroundImages = [
    // [ specified style,
    //   expected computed style,
    //   descriptionOfTestcase ],
    // Linear gradient with legacy-gradient-line (needs prefixed syntax):
    [ "-webkit-linear-gradient(10deg, red, blue)",
      "-webkit-linear-gradient(10deg, rgb(255, 0, 0), rgb(0, 0, 255))",
      "-webkit-linear-gradient with angled legacy-gradient-line" ],

    // Linear gradient with box corner (needs prefixed syntax):
    [ "-webkit-linear-gradient(top left, red, blue)",
      "-webkit-linear-gradient(left top, rgb(255, 0, 0), rgb(0, 0, 255))",
      "-webkit-linear-gradient with box corner" ],

    // Linear gradient with default keyword (should be serialized without keyword):
    [ "-webkit-linear-gradient(top, red, blue)",
      "-webkit-linear-gradient(rgb(255, 0, 0), rgb(0, 0, 255))",
      "-webkit-linear-gradient with legacy default direction keyword" ],

    // Radial gradients (should be serialized using modern unprefixed style):
    [ "-webkit-radial-gradient(contain, red, blue)",
      "-webkit-radial-gradient(closest-side, rgb(255, 0, 0), rgb(0, 0, 255))",
      "-webkit-radial-gradient with legacy 'contain' keyword" ],
  ];

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (var i = 0; i < backgroundImages.length; ++i) {
    var test = backgroundImages[i];
    p.style.backgroundImage = test[0];
    is(cs.backgroundImage, test[1],
       "computed value of prefixed gradient expression (" + test[2] + ")");
  }

  p.remove();
})();

(function test_bug_1367028() {
  const borderImageSubprops = [
    "border-image-slice",
    "border-image-outset",
    "border-image-width"
  ];
  const rectValues = [
    {
      values: ["5 5 5 5", "5 5 5", "5 5", "5"],
      expected: "5",
      desc: "identical four sides",
    },
    {
      values: ["5 6 5 6", "5 6 5", "5 6"],
      expected: "5 6",
      desc: "identical values on each axis",
    },
    {
      values: ["5 6 7 6", "5 6 7"],
      expected: "5 6 7",
      desc: "identical values on left and right",
    },
    {
      values: ["5 6 5 7"],
      desc: "identical values on top and bottom",
    },
    {
      values: ["5 5 6 6", "5 6 6 5"],
      desc: "identical values on unrelated sides",
    },
    {
      values: ["5 6 7 8"],
      desc: "different values on all sides",
    },
  ];

  let frameContainer = document.getElementById("display");
  let p = document.createElement("p");
  frameContainer.appendChild(p);
  let cs = getComputedStyle(p);

  for (let prop of borderImageSubprops) {
    for (let {values, expected, desc} of rectValues) {
      for (let value of values) {
        p.style.setProperty(prop, value);
        is(cs.getPropertyValue(prop),
           expected ? expected : value, `${desc} for ${prop}`);
        p.style.removeProperty(prop);
      }
    }
  }

  p.remove();
})();

(function test_bug_1378368() {
  // Test that negative results of calc()s in basic-shapes (e.g. polygon()) should
  // not be clamped to 0px.
  var clipPaths = [
    // [ specified style,
    //   expected computed style,
    //   descriptionOfTestcase ],
    // polygon:
    [ "polygon(calc(10px - 20px) 0px, 100px 100px, 0px 100px)",
      "polygon(-10px 0px, 100px 100px, 0px 100px)",
      "polygon with negative calc() coordinates" ],
    // inset:
    [ "inset(calc(10px - 20px))",
      "inset(-10px)",
      "inset with negative calc() coordinates" ],
  ];

  var p = document.createElement("p");
  var cs = getComputedStyle(p, "");
  frame_container.appendChild(p);

  for (let test of clipPaths) {
    p.style.clipPath = test[0];
    is(cs.clipPath, test[1],
       "computed value of clip-path for basic-shapes (" + test[2] + ")");
  }

  p.remove();
})();

(function test_bug_1418433() {
  // Test that the style data read through getComputedStyle is always up-to-date,
  // even for non-displayed elements.

  var d = document.createElement("div");
  d.setAttribute("id", "nonDisplayedDiv");
  var cs = getComputedStyle(d, null);
  noframe_container.appendChild(d);

  // Test for stylesheet change, i.e., added/changed/removed
  var style = document.getElementById("style");
  is(cs.height, "auto",
     "computed value of display none element (before testing)");
  style.textContent = "#nonDisplayedDiv { height: 100px; }";
  is(cs.height, "100px",
     "computed value of display none element (sheet added)");
  style.textContent = "#nonDisplayedDiv { height: 10px; }";
  is(cs.height, "10px",
     "computed value of display none element (sheet changed)");
  style.textContent = "";
  is(cs.height, "auto",
     "computed value of display none element (sheet removed)");

  // Test for rule change, i.e., added/changed/removed
  var styleSheet = style.sheet;
  is(cs.width, "auto",
     "computed value of display none element (before testing)");
  styleSheet.insertRule("#nonDisplayedDiv { width: 100px; }", 0);
  is(cs.width, "100px",
     "computed value of display none element (rule added)");
  styleSheet.deleteRule(0);
  styleSheet.insertRule("#nonDisplayedDiv { width: 10px; }", 0);
  is(cs.width, "10px",
     "computed value of display none element (rule changed)");
  styleSheet.deleteRule(0);
  is(cs.width, "auto",
     "computed value of display none element (rule removed)");

  d.remove();
})();

</script>
</pre>
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