The Tor Browser: layout/style/test/test_media_queries.html@141e0f1194b1 (annotated)

layout/style/test/test_media_queries.html@141e0f1194b1 (annotated)

layout/style/test/test_media_queries.html

Wed, 31 Dec 2014 07:16:47 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:16:47 +0100
branch: TOR_BUG_9701
changeset 3: 141e0f1194b1
permissions: -rw-r--r--

Revert simplistic fix pending revisit of Mozilla integration attempt.

 <!DOCTYPE HTML>
 <html>
 <!--
 https://bugzilla.mozilla.org/show_bug.cgi?id=156716
 -->
 <head>
   <title>Test for Bug 156716</title>
   <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body onload="run()">
 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=156716">Mozilla Bug 156716</a>
 <iframe id="subdoc" src="media_queries_iframe.html"></iframe>
 <div id="content" style="display: none">
 </div>
 <pre id="test">
 <script class="testbody" type="application/javascript">
 /** Test for Bug 156716 **/
 // Note that many other tests are in test_acid3_test46.html .
 SimpleTest.waitForExplicitFinish();
 var iframe;
 function getScreenPixelsPerCSSPixel() {
   return SpecialPowers.DOMWindowUtils.screenPixelsPerCSSPixel;
 }
 function run() {
   iframe = document.getElementById("subdoc");
   var subdoc = iframe.contentDocument;
   var subwin = iframe.contentWindow;
   var style = subdoc.getElementById("style");
   var iframe_style = iframe.style;
   var body_cs = subdoc.defaultView.getComputedStyle(subdoc.body, "");
   function query_applies(q) {
     style.setAttribute("media", q);
     return body_cs.getPropertyValue("text-decoration") == "underline";
   }
   function should_apply(q) {
     ok(query_applies(q), q + " should apply");
     test_serialization(q, true, true);
   }
   function should_not_apply(q) {
     ok(!query_applies(q), q + " should not apply");
     test_serialization(q, true, false);
   }
   /* for queries that are parseable standalone but not within CSS */
   function should_apply_unbalanced(q) {
     ok(query_applies(q), q + " should apply");
   }
   /* for queries that are parseable standalone but not within CSS */
   function should_not_apply_unbalanced(q) {
     ok(!query_applies(q), q + " should not apply");
   }
   /*
    * Functions to test whether a query is parseable at all.  (Should not
    * be used for parse errors within expressions.)
    */
   var parse_test_style_element = document.createElement("style");
   parse_test_style_element.type = "text/css";
   parse_test_style_element.disabled = true; // for performance, hopefully
   var parse_test_style_text = document.createTextNode("");
   parse_test_style_element.appendChild(parse_test_style_text);
   document.getElementsByTagName("head")[0]
     .appendChild(parse_test_style_element);
   function query_is_parseable(q) {
     parse_test_style_text.data = "@media screen, " + q + " {}";
     var sheet = parse_test_style_element.sheet; // XXX yikes, not live!
     if (sheet.cssRules.length == 1 &&
         sheet.cssRules[0].type == CSSRule.MEDIA_RULE)
       return sheet.cssRules[0].media.mediaText != "screen, not all";
     ok(false, "unexpected result testing whether query " + q +
               " is parseable");
     return true; // doesn't matter, we already failed
   }
   function query_should_be_parseable(q) {
     ok(query_is_parseable(q), "query " + q + " should be parseable");
     test_serialization(q, false, false);
   }
   function query_should_not_be_parseable(q) {
     ok(!query_is_parseable(q), "query " + q + " should not be parseable");
   }
   /*
    * Functions to test whether a single media expression is parseable.
    */
   function expression_is_parseable(e) {
     style.setAttribute("media", "all and (" + e + ")");
     return style.sheet.media.mediaText != "not all";
   }
   function expression_should_be_parseable(e) {
     ok(expression_is_parseable(e),
        "expression " + e + " should be parseable");
     test_serialization("all and (" + e + ")", false, false);
   }
   function expression_should_not_be_parseable(e) {
     ok(!expression_is_parseable(e),
        "expression " + e + " should not be parseable");
   }
   function test_serialization(q, test_application, should_apply) {
     style.setAttribute("media", q);
     var ser1 = style.sheet.media.mediaText;
     isnot(ser1, "", "serialization of '" + q + "' should not be empty");
     style.setAttribute("media", ser1);
     var ser2 = style.sheet.media.mediaText;
     is(ser2, ser1, "parse+serialize of '" + q + "' should be idempotent");
     if (test_application) {
       var applies = body_cs.getPropertyValue("text-decoration") == "underline";
       is(applies, should_apply,
          "Media query '" + q + "' should " + (should_apply ? "" : "NOT ") +
          "apply after serialize + reparse");
     }
     // Test cloning
     var sheet = "@media " + q + " { body { text-decoration: underline } }"
     var sheeturl = "data:text/css," + escape(sheet);
     var link = "<link rel='stylesheet' href='" + sheeturl + "'>";
     var htmldoc = "<!DOCTYPE HTML>" + link + link  + "<body>";
     var docurl = "data:text/html," + escape(htmldoc);
     post_clone_test(docurl, function() {
       var clonedoc = iframe.contentDocument;
       var clonewin = iframe.contentWindow;
       var links = clonedoc.getElementsByTagName("link");
       // cause a clone
       var clonedsheet = links[1].sheet;
       clonedsheet.insertRule("#nonexistent { color: purple}", 1);
       // remove the uncloned sheet
       links[0].parentNode.removeChild(links[0]);
       var ser3 = clonedsheet.cssRules[0].media.mediaText;
       is(ser3, ser1, "cloning query '" + q + "' should not change " +
                      "serialization");
       if (test_application) {
         var applies = clonewin.getComputedStyle(clonedoc.body, "").
                         textDecoration == "underline";
         is(applies, should_apply,
            "Media query '" + q + "' should " + (should_apply ? "" : "NOT ") +
            "apply after cloning");
       }
     });
   }
   // The no-type syntax doesn't mix with the not and only keywords.
   query_should_be_parseable("(orientation)");
   query_should_not_be_parseable("not (orientation)");
   query_should_not_be_parseable("only (orientation)");
   query_should_be_parseable("all and (orientation)");
   query_should_be_parseable("not all and (orientation)");
   query_should_be_parseable("only all and (orientation)");
   query_should_be_parseable("(-moz-device-orientation)");
   query_should_not_be_parseable("not (-moz-device-orientation)");
   query_should_not_be_parseable("only (-moz-device-orientation)");
   query_should_be_parseable("all and (-moz-device-orientation)");
   query_should_be_parseable("not all and (-moz-device-orientation)");
   query_should_be_parseable("only all and (-moz-device-orientation)");
   // Test that the 'not', 'only', 'and', and 'or' keywords are not
   // allowed as media types.
   query_should_not_be_parseable("not");
   query_should_not_be_parseable("and");
   query_should_not_be_parseable("or");
   query_should_not_be_parseable("only");
   query_should_be_parseable("unknowntype");
   query_should_not_be_parseable("not not");
   query_should_not_be_parseable("not and");
   query_should_not_be_parseable("not or");
   query_should_not_be_parseable("not only");
   query_should_be_parseable("not unknowntype");
   query_should_not_be_parseable("only not");
   query_should_not_be_parseable("only and");
   query_should_not_be_parseable("only or");
   query_should_not_be_parseable("only only");
   query_should_be_parseable("only unknowntype");
   query_should_not_be_parseable("not and (width)");
   query_should_not_be_parseable("and and (width)");
   query_should_not_be_parseable("or and (width)");
   query_should_not_be_parseable("only and (width)");
   query_should_be_parseable("unknowntype and (width)");
   query_should_not_be_parseable("not not and (width)");
   query_should_not_be_parseable("not and and (width)");
   query_should_not_be_parseable("not or and (width)");
   query_should_not_be_parseable("not only and (width)");
   query_should_be_parseable("not unknowntype and (width)");
   query_should_not_be_parseable("only not and (width)");
   query_should_not_be_parseable("only and and (width)");
   query_should_not_be_parseable("only or and (width)");
   query_should_not_be_parseable("only only and (width)");
   query_should_be_parseable("only unknowntype and (width)");
   var features = [ "width", "height", "device-width", "device-height" ];
   var feature;
   var i;
   for (i in features) {
     feature = features[i];
     expression_should_be_parseable(feature);
     expression_should_be_parseable(feature + ": 0");
     expression_should_be_parseable(feature + ": 0px");
     expression_should_be_parseable(feature + ": 0em");
     expression_should_be_parseable(feature + ": -0");
     expression_should_be_parseable("min-" + feature + ": -0");
     expression_should_be_parseable("max-" + feature + ": -0");
     expression_should_be_parseable(feature + ": -0cm");
     expression_should_be_parseable(feature + ": 1px");
     expression_should_be_parseable(feature + ": 0.001mm");
     expression_should_be_parseable(feature + ": 100000px");
     expression_should_not_be_parseable(feature + ": -1px");
     expression_should_not_be_parseable("min-" + feature + ": -1px");
     expression_should_not_be_parseable("max-" + feature + ": -1px");
     expression_should_not_be_parseable(feature + ": -0.00001mm");
     expression_should_not_be_parseable(feature + ": -100000em");
     expression_should_not_be_parseable("min-" + feature);
     expression_should_not_be_parseable("max-" + feature);
   }
   var content_div = document.getElementById("content");
   content_div.style.font = "initial";
   var em_size =
     getComputedStyle(content_div, "").fontSize.match(/^(\d+)px$/)[1];
   // in this test, assume the common underlying implementation is correct
   var width_val = 117; // pick two not-too-round numbers
   var height_val = 76;
   change_state(function() {
     iframe_style.width = width_val + "px";
     iframe_style.height = height_val + "px";
   });
   var device_width = window.screen.width;
   var device_height = window.screen.height;
   features = { "width": width_val,
                     "height": height_val,
                     "device-width": device_width,
                     "device-height": device_height };
   for (feature in features) {
     var value = features[feature];
     should_apply("all and (" + feature + ": " + value + "px)");
     should_not_apply("all and (" + feature + ": " + (value + 1) + "px)");
     should_not_apply("all and (" + feature + ": " + (value - 1) + "px)");
     should_apply("all and (min-" + feature + ": " + value + "px)");
     should_not_apply("all and (min-" + feature + ": " + (value + 1) + "px)");
     should_apply("all and (min-" + feature + ": " + (value - 1) + "px)");
     should_apply("all and (max-" + feature + ": " + value + "px)");
     should_apply("all and (max-" + feature + ": " + (value + 1) + "px)");
     should_not_apply("all and (max-" + feature + ": " + (value - 1) + "px)");
     should_not_apply("all and (min-" + feature + ": " +
                      (Math.ceil(value/em_size) + 1) + "em)");
     should_apply("all and (min-" + feature + ": " +
                  (Math.floor(value/em_size) - 1) + "em)");
     should_apply("all and (max-" + feature + ": " +
                  (Math.ceil(value/em_size) + 1) + "em)");
     should_not_apply("all and (max-" + feature + ": " +
                      (Math.floor(value/em_size) - 1) + "em)");
     should_not_apply("all and (min-" + feature + ": " +
                      (Math.ceil(value/em_size) + 1) + "rem)");
     should_apply("all and (min-" + feature + ": " +
                  (Math.floor(value/em_size) - 1) + "rem)");
     should_apply("all and (max-" + feature + ": " +
                  (Math.ceil(value/em_size) + 1) + "rem)");
     should_not_apply("all and (max-" + feature + ": " +
                      (Math.floor(value/em_size) - 1) + "rem)");
   }
   change_state(function() {
     iframe_style.width = "0";
   });
   should_apply("all and (height)");
   should_not_apply("all and (width)");
   change_state(function() {
     iframe_style.height = "0";
   });
   should_not_apply("all and (height)");
   should_not_apply("all and (width)");
   should_apply("all and (device-height)");
   should_apply("all and (device-width)");
   change_state(function() {
     iframe_style.width = width_val + "px";
   });
   should_not_apply("all and (height)");
   should_apply("all and (width)");
   change_state(function() {
     iframe_style.height = height_val + "px";
   });
   should_apply("all and (height)");
   should_apply("all and (width)");
   // ratio that reduces to 59/40
   change_state(function() {
     iframe_style.width = "236px";
     iframe_style.height = "160px";
   });
   expression_should_be_parseable("orientation");
   expression_should_be_parseable("orientation: portrait");
   expression_should_be_parseable("orientation: landscape");
   expression_should_not_be_parseable("min-orientation");
   expression_should_not_be_parseable("min-orientation: portrait");
   expression_should_not_be_parseable("min-orientation: landscape");
   expression_should_not_be_parseable("max-orientation");
   expression_should_not_be_parseable("max-orientation: portrait");
   expression_should_not_be_parseable("max-orientation: landscape");
   should_apply("(orientation)");
   should_apply("(orientation: landscape)");
   should_not_apply("(orientation: portrait)");
   should_apply("not all and (orientation: portrait)");
   // ratio that reduces to 59/80
   change_state(function() {
     iframe_style.height = "320px";
   });
   should_apply("(orientation)");
   should_not_apply("(orientation: landscape)");
   should_apply("not all and (orientation: landscape)");
   should_apply("(orientation: portrait)");
   expression_should_be_parseable("-moz-device-orientation");
   expression_should_be_parseable("-moz-device-orientation: portrait");
   expression_should_be_parseable("-moz-device-orientation: landscape");
   expression_should_not_be_parseable("min--moz-device-orientation");
   expression_should_not_be_parseable("min--moz-device-orientation: portrait");
   expression_should_not_be_parseable("min--moz-device-orientation: landscape");
   expression_should_not_be_parseable("max--moz-device-orientation");
   expression_should_not_be_parseable("max--moz-device-orientation: portrait");
   expression_should_not_be_parseable("max--moz-device-orientation: landscape");
   // determine the actual configuration of the screen and test against it
   var device_orientation = (device_width > device_height) ? "landscape" : "portrait";
   var not_device_orientation = (device_orientation == "landscape") ? "portrait" : "landscape";
   should_apply("(-moz-device-orientation)");
   should_apply("(-moz-device-orientation: " + device_orientation + ")");
   should_not_apply("(-moz-device-orientation: " + not_device_orientation + ")");
   should_apply("not all and (-moz-device-orientation: " + not_device_orientation + ")");
   should_apply("(aspect-ratio: 59/80)");
   should_not_apply("(aspect-ratio: 58/80)");
   should_not_apply("(aspect-ratio: 59/81)");
   should_not_apply("(aspect-ratio: 60/80)");
   should_not_apply("(aspect-ratio: 59/79)");
   should_apply("(aspect-ratio: 177/240)");
   should_apply("(aspect-ratio: 413/560)");
   should_apply("(aspect-ratio: 5900/8000)");
   should_not_apply("(aspect-ratio: 5901/8000)");
   should_not_apply("(aspect-ratio: 5899/8000)");
   should_not_apply("(aspect-ratio: 5900/8001)");
   should_not_apply("(aspect-ratio: 5900/7999)");
   should_apply("(aspect-ratio)");
   should_apply("(min-aspect-ratio: 59/80)");
   should_apply("(min-aspect-ratio: 58/80)");
   should_apply("(min-aspect-ratio: 59/81)");
   should_not_apply("(min-aspect-ratio: 60/80)");
   should_not_apply("(min-aspect-ratio: 59/79)");
   expression_should_not_be_parseable("min-aspect-ratio");
   should_apply("(max-aspect-ratio: 59/80)");
   should_not_apply("(max-aspect-ratio: 58/80)");
   should_not_apply("(max-aspect-ratio: 59/81)");
   should_apply("(max-aspect-ratio: 60/80)");
   should_apply("(max-aspect-ratio: 59/79)");
   expression_should_not_be_parseable("max-aspect-ratio");
   var real_dar = device_width + "/" + device_height;
   var high_dar_1 = (device_width + 1) + "/" + device_height;
   var high_dar_2 = device_width + "/" + (device_height - 1);
   var low_dar_1 = (device_width - 1) + "/" + device_height;
   var low_dar_2 = device_width + "/" + (device_height + 1);
   should_apply("(device-aspect-ratio: " + real_dar + ")");
   should_apply("not all and (device-aspect-ratio: " + high_dar_1 + ")");
   should_not_apply("all and (device-aspect-ratio: " + high_dar_2 + ")");
   should_not_apply("all and (device-aspect-ratio: " + low_dar_1 + ")");
   should_apply("not all and (device-aspect-ratio: " + low_dar_2 + ")");
   should_apply("(device-aspect-ratio)");
   should_apply("(min-device-aspect-ratio: " + real_dar + ")");
   should_not_apply("all and (min-device-aspect-ratio: " + high_dar_1 + ")");
   should_apply("not all and (min-device-aspect-ratio: " + high_dar_2 + ")");
   should_not_apply("not all and (min-device-aspect-ratio: " + low_dar_1 + ")");
   should_apply("all and (min-device-aspect-ratio: " + low_dar_2 + ")");
   expression_should_not_be_parseable("min-device-aspect-ratio");
   should_apply("all and (max-device-aspect-ratio: " + real_dar + ")");
   should_apply("(max-device-aspect-ratio: " + high_dar_1 + ")");
   should_apply("(max-device-aspect-ratio: " + high_dar_2 + ")");
   should_not_apply("all and (max-device-aspect-ratio: " + low_dar_1 + ")");
   should_apply("not all and (max-device-aspect-ratio: " + low_dar_2 + ")");
   expression_should_not_be_parseable("max-device-aspect-ratio");
   var real_dpr = 1.0 * getScreenPixelsPerCSSPixel();
   var high_dpr = 1.1 * getScreenPixelsPerCSSPixel();
   var low_dpr = 0.9 * getScreenPixelsPerCSSPixel();
   should_apply("all and (max--moz-device-pixel-ratio: " + real_dpr + ")");
   should_apply("all and (min--moz-device-pixel-ratio: " + real_dpr + ")");
   should_not_apply("not all and (max--moz-device-pixel-ratio: " + real_dpr + ")");
   should_not_apply("not all and (min--moz-device-pixel-ratio: " + real_dpr + ")");
   should_apply("all and (min--moz-device-pixel-ratio: " + low_dpr + ")");
   should_apply("all and (max--moz-device-pixel-ratio: " + high_dpr + ")");
   should_not_apply("all and (max--moz-device-pixel-ratio: " + low_dpr + ")");
   should_not_apply("all and (min--moz-device-pixel-ratio: " + high_dpr + ")");
   should_apply("not all and (max--moz-device-pixel-ratio: " + low_dpr + ")");
   should_apply("not all and (min--moz-device-pixel-ratio: " + high_dpr + ")");
   should_apply("(-moz-device-pixel-ratio: " + real_dpr + ")");
   should_not_apply("(-moz-device-pixel-ratio: " + high_dpr + ")");
   should_not_apply("(-moz-device-pixel-ratio: " + low_dpr + ")");
   should_apply("(-moz-device-pixel-ratio)");
   expression_should_not_be_parseable("min--moz-device-pixel-ratio");
   expression_should_not_be_parseable("max--moz-device-pixel-ratio");
   features = [ "max-aspect-ratio", "device-aspect-ratio" ];
   for (i in features) {
     feature = features[i];
     expression_should_be_parseable(feature + ": 1/1");
     expression_should_be_parseable(feature + ": 1  /1");
     expression_should_be_parseable(feature + ": 1  / \t\n1");
     expression_should_be_parseable(feature + ": 1/\r1");
     expression_should_not_be_parseable(feature + ": 1");
     expression_should_not_be_parseable(feature + ": 0.5");
     expression_should_not_be_parseable(feature + ": 1.0/1");
     expression_should_not_be_parseable(feature + ": 1/1.0");
     expression_should_not_be_parseable(feature + ": 1.0/1.0");
     expression_should_not_be_parseable(feature + ": 0/1");
     expression_should_not_be_parseable(feature + ": 1/0");
     expression_should_not_be_parseable(feature + ": 0/0");
     expression_should_not_be_parseable(feature + ": -1/1");
     expression_should_not_be_parseable(feature + ": 1/-1");
     expression_should_not_be_parseable(feature + ": -1/-1");
   }
   var is_monochrome = query_applies("all and (min-monochrome: 1)");
   test_serialization("all and (min-monochrome: 1)", true, is_monochrome);
   var is_color = query_applies("all and (min-color: 1)");
   test_serialization("all and (min-color: 1)", true, is_color);
   isnot(is_monochrome, is_color, "should be either monochrome or color");
   function depth_query(prefix, depth) {
     return "all and (" + prefix + (is_color ? "color" : "monochrome") +
            ":" + depth + ")";
   }
   var depth = 0;
   do {
     if (depth > 50) {
       ok(false, "breaking from loop, depth > 50");
       break;
     }
   } while (query_applies(depth_query("min-", ++depth)));
   --depth;
   should_apply(depth_query("", depth));
   should_not_apply(depth_query("", depth - 1));
   should_not_apply(depth_query("", depth + 1));
   should_apply(depth_query("max-", depth));
   should_not_apply(depth_query("max-", depth - 1));
   should_apply(depth_query("max-", depth + 1));
   (is_color ? should_apply : should_not_apply)("all and (color)");
   expression_should_not_be_parseable("max-color");
   expression_should_not_be_parseable("min-color");
   (is_color ? should_not_apply : should_apply)("all and (monochrome)");
   expression_should_not_be_parseable("max-monochrome");
   expression_should_not_be_parseable("min-monochrome");
   (is_color ? should_apply : should_not_apply)("not all and (monochrome)");
   (is_color ? should_not_apply : should_apply)("not all and (color)");
   (is_color ? should_apply : should_not_apply)("only all and (color)");
   (is_color ? should_not_apply : should_apply)("only all and (monochrome)");
   features = [ "color", "min-monochrome", "max-color-index" ];
   for (i in features) {
     feature = features[i];
     expression_should_be_parseable(feature + ": 1");
     expression_should_be_parseable(feature + ": 327");
     expression_should_be_parseable(feature + ": 0");
     expression_should_not_be_parseable(feature + ": 1.0");
     expression_should_not_be_parseable(feature + ": -1");
     expression_should_not_be_parseable(feature + ": 1/1");
   }
   // Presume that we never support indexed color (at least not usefully
   // enough to call it indexed color).
   should_apply("(color-index: 0)");
   should_not_apply("(color-index: 1)");
   should_apply("(min-color-index: 0)");
   should_not_apply("(min-color-index: 1)");
   should_apply("(max-color-index: 0)");
   should_apply("(max-color-index: 1)");
   should_apply("(max-color-index: 157)");
   features = [ "resolution", "min-resolution", "max-resolution" ];
   for (i in features) {
     feature = features[i];
     expression_should_be_parseable(feature + ": 3dpi");
     expression_should_be_parseable(feature + ":3dpi");
     expression_should_be_parseable(feature + ": 3.0dpi");
     expression_should_be_parseable(feature + ": 3.4dpi");
     expression_should_be_parseable(feature + "\t: 120dpcm");
     expression_should_be_parseable(feature + ": 1dppx");
     expression_should_be_parseable(feature + ": 1.5dppx");
     expression_should_be_parseable(feature + ": 2.0dppx");
     expression_should_not_be_parseable(feature + ": 0dpi");
     expression_should_not_be_parseable(feature + ": -3dpi");
     expression_should_not_be_parseable(feature + ": 0dppx");
   }
   // Find the resolution using max-resolution
   var resolution = 0;
   do {
     ++resolution;
     if (resolution > 10000) {
       ok(false, "resolution greater than 10000dpi???");
       break;
     }
   } while (!query_applies("(max-resolution: " + resolution + "dpi)"));
   // resolution should now be Math.ceil() of the actual resolution.
   var dpi_high;
   var dpi_low = resolution - 1;
   if (query_applies("(min-resolution: " + resolution + "dpi)")) {
     // It's exact!
     should_apply("(resolution: " + resolution + "dpi)");
     should_apply("(resolution: " + Math.floor(resolution/96) + "dppx)");
     should_not_apply("(resolution: " + (resolution + 1) + "dpi)");
     should_not_apply("(resolution: " + (resolution - 1) + "dpi)");
     dpi_high = resolution + 1;
   } else {
 	// We have no way to test resolution applying since it need not be
 	// an integer.
     should_not_apply("(resolution: " + resolution + "dpi)");
     should_not_apply("(resolution: " + (resolution - 1) + "dpi)");
     dpi_high = resolution;
   }
   should_apply("(min-resolution: " + dpi_low + "dpi)");
   should_not_apply("not all and (min-resolution: " + dpi_low + "dpi)");
   should_apply("not all and (min-resolution: " + dpi_high + "dpi)");
   should_not_apply("all and (min-resolution: " + dpi_high + "dpi)");
   // Test dpcm units based on what we computed in dpi.
   var dpcm_high = Math.ceil(dpi_high / 2.54);
   var dpcm_low = Math.floor(dpi_low / 2.54);
   should_apply("(min-resolution: " + dpcm_low + "dpcm)");
   should_apply("(max-resolution: " + dpcm_high + "dpcm)");
   should_not_apply("(max-resolution: " + dpcm_low + "dpcm)");
   should_apply("not all and (min-resolution: " + dpcm_high + "dpcm)");
   expression_should_be_parseable("scan");
   expression_should_be_parseable("scan: progressive");
   expression_should_be_parseable("scan:interlace");
   expression_should_not_be_parseable("min-scan:interlace");
   expression_should_not_be_parseable("scan: 1");
   expression_should_not_be_parseable("max-scan");
   expression_should_not_be_parseable("max-scan: progressive");
   // Assume we don't support tv devices.
   should_not_apply("(scan)");
   should_not_apply("(scan: progressive)");
   should_not_apply("(scan: interlace)");
   should_apply("not all and (scan)");
   should_apply("not all and (scan: progressive)");
   should_apply("not all and (scan: interlace)");
   expression_should_be_parseable("grid");
   expression_should_be_parseable("grid: 0");
   expression_should_be_parseable("grid: 1");
   expression_should_be_parseable("grid: 1");
   expression_should_not_be_parseable("min-grid");
   expression_should_not_be_parseable("min-grid:0");
   expression_should_not_be_parseable("max-grid: 1");
   expression_should_not_be_parseable("grid: 2");
   expression_should_not_be_parseable("grid: -1");
   // Assume we don't support grid devices
   should_not_apply("(grid)");
   should_apply("(grid: 0)");
   should_not_apply("(grid: 1)");
   should_not_apply("(grid: 2)");
   should_not_apply("(grid: -1)");
   // System metrics
   expression_should_be_parseable("-moz-scrollbar-start-backward");
   expression_should_be_parseable("-moz-scrollbar-start-forward");
   expression_should_be_parseable("-moz-scrollbar-end-backward");
   expression_should_be_parseable("-moz-scrollbar-end-forward");
   expression_should_be_parseable("-moz-scrollbar-thumb-proportional");
   expression_should_be_parseable("-moz-images-in-menus");
   expression_should_be_parseable("-moz-images-in-buttons");
   expression_should_be_parseable("-moz-overlay-scrollbars");
   expression_should_be_parseable("-moz-windows-default-theme");
   expression_should_be_parseable("-moz-mac-graphite-theme");
   expression_should_be_parseable("-moz-mac-lion-theme");
   expression_should_be_parseable("-moz-windows-compositor");
   expression_should_be_parseable("-moz-windows-classic");
   expression_should_be_parseable("-moz-windows-glass");
   expression_should_be_parseable("-moz-touch-enabled");
   expression_should_be_parseable("-moz-swipe-animation-enabled");
   expression_should_be_parseable("-moz-scrollbar-start-backward: 0");
   expression_should_be_parseable("-moz-scrollbar-start-forward: 0");
   expression_should_be_parseable("-moz-scrollbar-end-backward: 0");
   expression_should_be_parseable("-moz-scrollbar-end-forward: 0");
   expression_should_be_parseable("-moz-scrollbar-thumb-proportional: 0");
   expression_should_be_parseable("-moz-images-in-menus: 0");
   expression_should_be_parseable("-moz-images-in-buttons: 0");
   expression_should_be_parseable("-moz-overlay-scrollbars: 0");
   expression_should_be_parseable("-moz-windows-default-theme: 0");
   expression_should_be_parseable("-moz-mac-graphite-theme: 0");
   expression_should_be_parseable("-moz-mac-lion-theme: 0");
   expression_should_be_parseable("-moz-windows-compositor: 0");
   expression_should_be_parseable("-moz-windows-classic: 0");
   expression_should_be_parseable("-moz-windows-glass: 0");
   expression_should_be_parseable("-moz-touch-enabled: 0");
   expression_should_be_parseable("-moz-swipe-animation-enabled: 0");
   expression_should_be_parseable("-moz-scrollbar-start-backward: 1");
   expression_should_be_parseable("-moz-scrollbar-start-forward: 1");
   expression_should_be_parseable("-moz-scrollbar-end-backward: 1");
   expression_should_be_parseable("-moz-scrollbar-end-forward: 1");
   expression_should_be_parseable("-moz-scrollbar-thumb-proportional: 1");
   expression_should_be_parseable("-moz-images-in-menus: 1");
   expression_should_be_parseable("-moz-images-in-buttons: 1");
   expression_should_be_parseable("-moz-overlay-scrollbars: 1");
   expression_should_be_parseable("-moz-windows-default-theme: 1");
   expression_should_be_parseable("-moz-mac-graphite-theme: 1");
   expression_should_be_parseable("-moz-mac-lion-theme: 1");
   expression_should_be_parseable("-moz-windows-compositor: 1");
   expression_should_be_parseable("-moz-windows-classic: 1");
   expression_should_be_parseable("-moz-windows-glass: 1");
   expression_should_be_parseable("-moz-touch-enabled: 1");
   expression_should_be_parseable("-moz-swipe-animation-enabled: 1");
   expression_should_not_be_parseable("-moz-scrollbar-start-backward: -1");
   expression_should_not_be_parseable("-moz-scrollbar-start-forward: -1");
   expression_should_not_be_parseable("-moz-scrollbar-end-backward: -1");
   expression_should_not_be_parseable("-moz-scrollbar-end-forward: -1");
   expression_should_not_be_parseable("-moz-scrollbar-thumb-proportional: -1");
   expression_should_not_be_parseable("-moz-images-in-menus: -1");
   expression_should_not_be_parseable("-moz-images-in-buttons: -1");
   expression_should_not_be_parseable("-moz-overlay-scrollbars: -1");
   expression_should_not_be_parseable("-moz-windows-default-theme: -1");
   expression_should_not_be_parseable("-moz-mac-graphite-theme: -1");
   expression_should_not_be_parseable("-moz-mac-lion-theme: -1");
   expression_should_not_be_parseable("-moz-windows-compositor: -1");
   expression_should_not_be_parseable("-moz-windows-classic: -1");
   expression_should_not_be_parseable("-moz-windows-glass: -1");
   expression_should_not_be_parseable("-moz-touch-enabled: -1");
   expression_should_not_be_parseable("-moz-swipe-animation-enabled: -1");
   expression_should_not_be_parseable("-moz-scrollbar-start-backward: true");
   expression_should_not_be_parseable("-moz-scrollbar-start-forward: true");
   expression_should_not_be_parseable("-moz-scrollbar-end-backward: true");
   expression_should_not_be_parseable("-moz-scrollbar-end-forward: true");
   expression_should_not_be_parseable("-moz-scrollbar-thumb-proportional: true");
   expression_should_not_be_parseable("-moz-images-in-menus: true");
   expression_should_not_be_parseable("-moz-images-in-buttons: true");
   expression_should_not_be_parseable("-moz-overlay-scrollbars: true");
   expression_should_not_be_parseable("-moz-windows-default-theme: true");
   expression_should_not_be_parseable("-moz-mac-graphite-theme: true");
   expression_should_not_be_parseable("-moz-mac-lion-theme: true");
   expression_should_not_be_parseable("-moz-windows-compositor: true");
   expression_should_not_be_parseable("-moz-windows-classic: true");
   expression_should_not_be_parseable("-moz-windows-glass: true");
   expression_should_not_be_parseable("-moz-touch-enabled: true");
   expression_should_not_be_parseable("-moz-swipe-animation-enabled: true");
   // windows theme media queries
   expression_should_be_parseable("-moz-windows-theme: aero");
   expression_should_be_parseable("-moz-windows-theme: aero-lite");
   expression_should_be_parseable("-moz-windows-theme: luna-blue");
   expression_should_be_parseable("-moz-windows-theme: luna-olive");
   expression_should_be_parseable("-moz-windows-theme: luna-silver");
   expression_should_be_parseable("-moz-windows-theme: royale");
   expression_should_be_parseable("-moz-windows-theme: generic");
   expression_should_be_parseable("-moz-windows-theme: zune");
   expression_should_be_parseable("-moz-windows-theme: garbage");
   expression_should_not_be_parseable("-moz-windows-theme: ''");
   expression_should_not_be_parseable("-moz-windows-theme: ");
   // os version media queries (currently windows only)
   expression_should_be_parseable("-moz-os-version: windows-xp");
   expression_should_be_parseable("-moz-os-version: windows-vista");
   expression_should_be_parseable("-moz-os-version: windows-win7");
   expression_should_be_parseable("-moz-os-version: windows-win8");
   expression_should_not_be_parseable("-moz-os-version: ");
   // OpenType SVG media features
   query_should_be_parseable("(-moz-is-glyph)");
   query_should_not_be_parseable("not (-moz-is-glyph)");
   query_should_not_be_parseable("only (-moz-is-glyph)");
   query_should_be_parseable("all and (-moz-is-glyph)");
   query_should_be_parseable("not all and (-moz-is-glyph)");
   query_should_be_parseable("only all and (-moz-is-glyph)");
   query_should_be_parseable("(-moz-is-glyph:0)");
   query_should_not_be_parseable("not (-moz-is-glyph:0)");
   query_should_not_be_parseable("only (-moz-is-glyph:0)");
   query_should_be_parseable("all and (-moz-is-glyph:0)");
   query_should_be_parseable("not all and (-moz-is-glyph:0)");
   query_should_be_parseable("only all and (-moz-is-glyph:0)");
   query_should_be_parseable("(-moz-is-glyph:1)");
   query_should_not_be_parseable("not (-moz-is-glyph:1)");
   query_should_not_be_parseable("only (-moz-is-glyph:1)");
   query_should_be_parseable("all and (-moz-is-glyph:1)");
   query_should_be_parseable("not all and (-moz-is-glyph:1)");
   query_should_be_parseable("only all and (-moz-is-glyph:1)");
   query_should_not_be_parseable("(min--moz-is-glyph:0)");
   query_should_not_be_parseable("(max--moz-is-glyph:0)");
   query_should_not_be_parseable("(min--moz-is-glyph:1)");
   query_should_not_be_parseable("(max--moz-is-glyph:1)");
   should_apply("not all and (-moz-is-glyph)");
   should_apply("(-moz-is-glyph:0)");
   should_apply("not all and (-moz-is-glyph:1)");
   should_apply("only all and (-moz-is-glyph:0)");
   should_not_apply("(-moz-is-glyph)");
   should_not_apply("(-moz-is-glyph:1)");
   should_not_apply("not all and (-moz-is-glyph:0)");
   should_not_apply("only all and (-moz-is-glyph:1)");
   // Parsing tests
   // bug 454227
   should_apply_unbalanced("(orientation");
   should_not_apply_unbalanced("not all and (orientation");
   should_not_apply_unbalanced("(orientation:");
   should_apply_unbalanced("all,(orientation:");
   should_not_apply_unbalanced("(orientation:,all");
   should_apply_unbalanced("not all and (grid");
   should_not_apply_unbalanced("only all and (grid");
   should_not_apply_unbalanced("(grid");
   should_apply_unbalanced("all,(grid");
   should_not_apply_unbalanced("(grid,all");
   // bug 454226
   should_apply(",all");
   should_apply("all,");
   should_apply(",all,");
   should_apply("all,badmedium");
   should_apply("badmedium,all");
   should_not_apply(",badmedium,");
   should_apply("all,(badexpression)");
   should_apply("(badexpression),all");
   should_not_apply("(badexpression),badmedium");
   should_not_apply("badmedium,(badexpression)");
   should_apply("all,[badsyntax]");
   should_apply("[badsyntax],all");
   should_not_apply("badmedium,[badsyntax]");
   should_not_apply("[badsyntax],badmedium");
   // bug 528096
   should_not_apply_unbalanced("((resolution),all");
   should_not_apply_unbalanced("(resolution(),all");
   should_not_apply_unbalanced("(resolution (),all");
   should_not_apply_unbalanced("(resolution:(),all");
   handle_posted_items();
 }
 /*
  * The cloning tests have to post tests that wait for onload.  However,
  * we also make a bunch of state changes during the tests above.  So we
  * always change state using the change_state call, with both makes the
  * change immediately and posts an item in the same queue so that we
  * make the same state change again later.
  */
 var posted_items = [];
 function change_state(func)
 {
   func();
   posted_items.push({state: func});
 }
 function post_clone_test(docurl, testfunc)
 {
   posted_items.push({docurl: docurl, testfunc: testfunc});
 }
 function handle_posted_items()
 {
   if (posted_items.length == 0) {
     SimpleTest.finish();
     return;
   }
   if ("state" in posted_items[0]) {
     var item = posted_items.shift();
     item.state();
     handle_posted_items();
     return;
   }
   var docurl = posted_items[0].docurl;
   iframe.onload = handle_iframe_onload;
   iframe.src = docurl;
 }
 function handle_iframe_onload(event)
 {
   if (event.target != iframe)
     return;
   var item = posted_items.shift();
   item.testfunc();
   handle_posted_items();
 }
 </script>
 </pre>
 </body>
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