gecko-dev/layout/style/test/test_value_cloning.html

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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=375363
-->
<head>
<title>Test for cloning of CSS property values (including 'inherit' and '-moz-initial')</title>
<script type="text/javascript" src="/MochiKit/packed.js"></script>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="property_database.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"><iframe id="iframe" src="about:blank"></iframe></p>
<pre id="test">
<script class="testbody" type="text/javascript">
/** Test for cloning of CSS property values (including 'inherit' and '-moz-initial') **/
var test_queue = [];
var iframe = document.getElementById("iframe");
var current_item;
SimpleTest.waitForExplicitFinish();
SimpleTest.requestLongerTimeout(4);
for (var prop in gCSSProperties) {
var info = gCSSProperties[prop];
test_queue.push({ prop: prop, value: "inherit",
inherited_value: info.initial_values[0] });
test_queue.push({ prop: prop, value: "inherit",
inherited_value: info.other_values[0] });
test_queue.push({ prop: prop, value: "-moz-initial" });
for (var idx in info.initial_values) {
test_queue.push({ prop: prop, value: info.initial_values[idx] });
}
for (var idx in info.other_values) {
test_queue.push({ prop: prop, value: info.other_values[idx] });
}
}
test_queue.reverse();
process_next_item();
function process_next_item()
{
if (test_queue.length == 0) {
SimpleTest.finish();
return;
}
current_item = test_queue.pop();
var info = gCSSProperties[current_item.prop];
var sheet_data = "";
sheet_data += "#parent, #test { ";
for (var prereq in info.prereqs) {
sheet_data += prereq + ": " + info.prereqs[prereq] + ";";
}
sheet_data += " }";
sheet_data += "#parent { ";
if ("inherited_value" in current_item) {
sheet_data += current_item.prop + ": " + current_item.inherited_value;
}
sheet_data += " }";
sheet_data += "#test { ";
sheet_data += current_item.prop + ": " + current_item.value;
sheet_data += " }";
var sheet_url = "data:text/css," + escape(sheet_data);
var doc_data =
"<!DOCTYPE HTML>\n" +
"<link rel='stylesheet' type='text/css' href='" + sheet_url + "'>\n" +
"<link rel='stylesheet' type='text/css' href='" + sheet_url + "'>\n" +
"<body>\n";
if ("inherited_value" in current_item) {
doc_data += "<span id='parent'>";
}
doc_data += "<span id='test'></span>";
if ("inherited_value" in current_item) {
doc_data += "</span>";
}
var doc_url = "data:text/html," + escape(doc_data);
iframe.onload = iframe_loaded;
iframe.src = doc_url;
}
function iframe_loaded(event)
{
if (event.target != iframe)
return;
var info = gCSSProperties[current_item.prop];
var ifdoc = iframe.contentDocument;
var test = ifdoc.getElementById("test");
var test_cs = iframe.contentWindow.getComputedStyle(test, "");
var start_ser =
ifdoc.styleSheets[0].cssRules[2].style.getPropertyValue(current_item.prop);
if (start_ser == "") {
isnot(start_ser, "",
"serialization should be nonempty for " +
current_item.prop + ": " + current_item.value);
}
var start_compute;
if (!("backend_only" in info)) {
start_compute = get_computed_value(test_cs, current_item.prop);
if (start_compute == "") {
isnot(start_compute, "",
"computed value should be nonempty for " +
current_item.prop + ": " + current_item.value);
}
}
// In case the above access didn't force a clone already (though it
// currently does), clone the second style sheet's inner and then
// remove the first.
ifdoc.styleSheets[1].insertRule("#nonexistent { color: red }", 0);
var firstlink = ifdoc.getElementsByTagName("link")[0];
firstlink.parentNode.removeChild(firstlink);
// Force a flush
ifdoc.body.style.display="none";
var ow = ifdoc.body.offsetWidth;
ifdoc.body.style.display="";
var end_ser =
ifdoc.styleSheets[0].cssRules[3].style.getPropertyValue(current_item.prop);
is(end_ser, start_ser,
"serialization should match when cloning " +
current_item.prop + ": " + current_item.value);
if (!("backend_only" in info)) {
var end_compute = get_computed_value(test_cs, current_item.prop);
is(end_compute, start_compute,
"computed values should match when cloning " +
current_item.prop + ": " + current_item.value);
}
process_next_item();
}
</script>
</pre>
</body>
</html>