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131 lines
4.0 KiB
HTML
131 lines
4.0 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!-- https://bugzilla.mozilla.org/show_bug.cgi?id=879963 -->
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<head>
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<meta charset="utf-8">
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<title>Test for bug 879963</title>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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<!-- Two <style> elements with identical @font-face rules.
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Although multiple @font-face at-rules for the same family are legal,
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and add faces to the family, we should NOT download the same resource
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twice just because we have a duplicate face entry. -->
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<style type="text/css">
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@font-face {
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font-family: foo;
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src: url("redundant_font_download.sjs?q=font");
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}
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.test {
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font-family: foo;
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}
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</style>
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<style type="text/css">
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@font-face {
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font-family: foo;
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src: url("redundant_font_download.sjs?q=font");
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}
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.test {
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font-family: foo;
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}
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</style>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=879963">Mozilla Bug 879963</a>
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<div>
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<!-- the 'init' request returns an image (just so we can see it's working)
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and initializes the request logging in our sjs server -->
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<img src="redundant_font_download.sjs?q=init">
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</div>
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<div id="test">
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Test
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</div>
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<div>
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<img id="image2" src="">
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</div>
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<script type="application/javascript">
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// helper to retrieve the server's request log as text
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function getRequestLog() {
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var xmlHttp = new XMLHttpRequest();
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xmlHttp.open("GET", "redundant_font_download.sjs?q=report", false);
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xmlHttp.send(null);
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return xmlHttp.responseText;
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}
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// retrieve just the most recent request the server has seen
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function getLastRequest() {
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return getRequestLog().split(";").pop();
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}
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// poll the server at intervals of 'delay' ms until it has seen a specific request,
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// or until maxTime ms have passed
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function waitForRequest(request, delay, maxTime, func) {
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timeLimit = Date.now() + maxTime;
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var intervalId = window.setInterval(function() {
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var req = getLastRequest();
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if (req == request || Date.now() > timeLimit) {
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window.clearInterval(intervalId);
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func();
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}
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}.bind(this), delay);
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}
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// initially disable the second of the <style> elements,
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// so we only have a single copy of the font-face
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document.getElementsByTagName("style")[1].disabled = true;
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SimpleTest.waitForExplicitFinish();
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// We perform a series of actions that trigger requests to the .sjs server,
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// and poll the server's request log at each stage to check that it has
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// seen the request we expected before we proceed to the next step.
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function startTest() {
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is(getRequestLog(), "init", "request log has been initialized");
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// this should trigger a font download
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document.getElementById("test").className = "test";
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// wait to confirm that the server has received the request
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waitForRequest("font", 10, 5000, continueTest1);
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}
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function continueTest1() {
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is(getRequestLog(), "init;font", "server received font request");
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// trigger a request for the second image, to provide an explicit
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// delimiter in the log before we enable the second @font-face rule
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document.getElementById("image2").src = "redundant_font_download.sjs?q=image";
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waitForRequest("image", 10, 5000, continueTest2);
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}
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function continueTest2() {
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is(getRequestLog(), "init;font;image", "server received image request");
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// enable the second <style> element: we should NOT see a second font request,
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// we expect waitForRequest to time out instead
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document.getElementsByTagName("style")[1].disabled = false;
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waitForRequest("font", 10, 1000, continueTest3);
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}
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function continueTest3() {
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is(getRequestLog(), "init;font;image", "should NOT have re-requested the font");
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SimpleTest.finish();
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}
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waitForRequest("init", 10, 5000, startTest);
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</script>
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</body>
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</html>
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