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test_media_query_list.html
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test_media_query_list.html
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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=542058
-->
<head>
<title>Test for MediaQueryList (Bug 542058)</title>
<script type="application/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=542058">Mozilla Bug 542058</a>
<iframe id="subdoc" src="about:blank"></iframe>
<div id="content" style="display:none"></div>
<pre id="test">
<script type="application/javascript">
/** Test for MediaQueryList (Bug 542058) **/
SimpleTest.waitForExplicitFinish();
function run() {
var iframe = document.getElementById("subdoc");
var subdoc = iframe.contentDocument;
var subwin = iframe.contentWindow;
var subroot = subdoc.documentElement;
var content_div = document.getElementById("content");
content_div.style.font = "-moz-initial";
var em_size =
getComputedStyle(content_div, "").fontSize.match(/^(\d+)px$/)[1];
var w = Math.floor(em_size * 9.3);
var h = Math.floor(em_size * 4.2);
iframe.style.width = w + "px";
iframe.style.height = h + "px";
subroot.offsetWidth; // flush layout
function setup_mql(str) {
var obj = {
str: str,
mql: subwin.matchMedia(str),
notifyCount: 0,
listener: function(mql) {
is(mql, obj.mql,
"correct argument to listener: " + obj.str);
++obj.notifyCount;
// Test the last match result only on odd
// notifications.
if (obj.notifyCount & 1) {
obj.lastOddMatchResult = mql.matches;
}
}
}
obj.mql.addListener(obj.listener);
return obj;
}
function finish_mql(obj) {
obj.mql.removeListener(obj.listener);
}
var w_exact_w = setup_mql("(width: " + w + "px)");
var w_min_9em = setup_mql("(min-width : 9em)");
var w_min_10em = setup_mql("( min-width: 10em ) ");
var w_max_9em = setup_mql("(max-width: 9em)");
var w_max_10em = setup_mql("(max-width: 10em)");
is(w_exact_w.mql.media, "(width: " + w + "px)", "serialization");
is(w_min_9em.mql.media, "(min-width: 9em)", "serialization");
is(w_min_10em.mql.media, "(min-width: 10em)", "serialization");
is(w_max_9em.mql.media, "(max-width: 9em)", "serialization");
is(w_max_10em.mql.media, "(max-width: 10em)", "serialization");
function check_match(obj, expected, desc) {
is(obj.mql.matches, expected,
obj.str + " media query list .matches " + desc);
if (obj.notifyCount & 1) { // odd notifications only
is(obj.lastOddMatchResult, expected,
obj.str + " media query list last notify result " + desc);
}
}
function check_notify(obj, expected, desc) {
is(obj.notifyCount, expected,
obj.str + " media query list .notify count " + desc);
}
check_match(w_exact_w, true, "initially");
check_notify(w_exact_w, 0, "initially");
check_match(w_min_9em, true, "initially");
check_notify(w_min_9em, 0, "initially");
check_match(w_min_10em, false, "initially");
check_notify(w_min_10em, 0, "initially");
check_match(w_max_9em, false, "initially");
check_notify(w_max_9em, 0, "initially");
check_match(w_max_10em, true, "initially");
check_notify(w_max_10em, 0, "initially");
var w2 = Math.floor(em_size * 10.3);
iframe.style.width = w2 + "px";
subroot.offsetWidth; // flush layout
check_match(w_exact_w, false, "after width increase to around 10.3em");
check_notify(w_exact_w, 1, "after width increase to around 10.3em");
check_match(w_min_9em, true, "after width increase to around 10.3em");
check_notify(w_min_9em, 0, "after width increase to around 10.3em");
check_match(w_min_10em, true, "after width increase to around 10.3em");
check_notify(w_min_10em, 1, "after width increase to around 10.3em");
check_match(w_max_9em, false, "after width increase to around 10.3em");
check_notify(w_max_9em, 0, "after width increase to around 10.3em");
check_match(w_max_10em, false, "after width increase to around 10.3em");
check_notify(w_max_10em, 1, "after width increase to around 10.3em");
var w3 = w * 2;
iframe.style.width = w3 + "px";
subroot.offsetWidth; // flush layout
check_match(w_exact_w, false, "after width double from original");
check_notify(w_exact_w, 1, "after width double from original");
check_match(w_min_9em, true, "after width double from original");
check_notify(w_min_9em, 0, "after width double from original");
check_match(w_min_10em, true, "after width double from original");
check_notify(w_min_10em, 1, "after width double from original");
check_match(w_max_9em, false, "after width double from original");
check_notify(w_max_9em, 0, "after width double from original");
check_match(w_max_10em, false, "after width double from original");
check_notify(w_max_10em, 1, "after width double from original");
SpecialPowers.setFullZoom(subwin, 2.0);
subroot.offsetWidth; // flush layout
check_match(w_exact_w, true, "after zoom");
check_notify(w_exact_w, 2, "after zoom");
check_match(w_min_9em, true, "after zoom");
check_notify(w_min_9em, 0, "after zoom");
check_match(w_min_10em, false, "after zoom");
check_notify(w_min_10em, 2, "after zoom");
check_match(w_max_9em, false, "after zoom");
check_notify(w_max_9em, 0, "after zoom");
check_match(w_max_10em, true, "after zoom");
check_notify(w_max_10em, 2, "after zoom");
SpecialPowers.setFullZoom(subwin, 1.0);
finish_mql(w_exact_w);
finish_mql(w_min_9em);
finish_mql(w_min_10em);
finish_mql(w_max_9em);
finish_mql(w_max_10em);
// Additional tests of listener mutation.
(function() {
var received = [];
var received_mql = [];
function listener1(mql) {
received.push(1);
received_mql.push(mql);
}
function listener2(mql) {
received.push(2);
received_mql.push(mql);
}
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
var mql = subwin.matchMedia("(min-width: 150px)");
mql.addListener(listener1);
mql.addListener(listener1);
mql.addListener(listener2);
is(JSON.stringify(received), "[]", "listeners before notification");
iframe.style.width = "100px";
subroot.offsetWidth; // flush layout
is(JSON.stringify(received), "[1,2]", "duplicate listeners removed");
received = [];
mql.removeListener(listener1);
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
is(JSON.stringify(received), "[2]", "listener removal");
received = [];
mql.addListener(listener1);
iframe.style.width = "100px";
subroot.offsetWidth; // flush layout
is(JSON.stringify(received), "[2,1]", "listeners notified in order");
received = [];
mql.addListener(listener2);
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
is(JSON.stringify(received), "[2,1]", "add of existing listener is no-op");
received = [];
mql.addListener(listener1);
iframe.style.width = "100px";
subroot.offsetWidth; // flush layout
is(JSON.stringify(received), "[2,1]", "add of existing listener is no-op");
mql.removeListener(listener2);
received = [];
received_mql = [];
var mql2 = subwin.matchMedia("(min-width: 160px)");
mql2.addListener(listener1);
mql.addListener(listener2);
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
// mql (1, 2), mql2 (1)
is(JSON.stringify(received), "[1,2,1]",
"notification of lists in order created");
is(received_mql[0], mql,
"notification of lists in order created");
is(received_mql[1], mql,
"notification of lists in order created");
is(received_mql[2], mql2,
"notification of lists in order created");
received = [];
received_mql = [];
function removing_listener(mql) {
received.push(3);
received_mql.push(mql);
mql.removeListener(listener2);
mql2.removeListener(listener1);
}
mql.addListener(removing_listener);
mql.removeListener(listener2);
mql.addListener(listener2); // after removing_listener (3)
iframe.style.width = "100px";
subroot.offsetWidth; // flush layout
// mql(1, 3, 2) mql2(1)
is(JSON.stringify(received), "[1,3,2,1]",
"listeners still notified after removed if change was before");
is(received_mql[0], mql,
"notification order (removal tests)");
is(received_mql[1], mql,
"notification order (removal tests)");
is(received_mql[2], mql,
"notification order (removal tests)");
is(received_mql[3], mql2,
"notification order (removal tests)");
received = [];
received_mql = [];
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
// mql(1, 3)
is(JSON.stringify(received), "[1,3]",
"listeners not notified for changes after their removal");
is(received_mql[0], mql,
"notification order (removal tests)");
is(received_mql[1], mql,
"notification order (removal tests)");
})();
/* Bug 716751: null-dereference crash */
(function() {
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
var mql = subwin.matchMedia("(min-width: 150px)");
mql.addListener(null);
iframe.style.width = "100px";
subroot.offsetWidth; // flush layout
// With the bug, we crash here. No need for test assertions.
mql.removeListener(null);
mql.removeListener(null);
})();
/* Bug 716751: listeners lost due to GC */
var gc_received = [];
(function() {
var received = [];
var listener1 = function(mql) {
gc_received.push(1);
}
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
var mql = subwin.matchMedia("(min-width: 150px)");
mql.addListener(listener1);
is(JSON.stringify(gc_received), "[]", "GC test: before notification");
iframe.style.width = "100px";
subroot.offsetWidth; // flush layout
is(JSON.stringify(gc_received), "[1]", "GC test: after notification 1");
// Because of conservative GC, we need to go back to the event loop
// to GC properly.
setTimeout(step2, 0);
})();
function step2() {
SpecialPowers.DOMWindowUtils.garbageCollect();
iframe.style.width = "200px";
subroot.offsetWidth; // flush layout
is(JSON.stringify(gc_received), "[1,1]", "GC test: after notification 2");
SimpleTest.finish();
}
}
</script>
</pre>
</body>
</html>