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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:44:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:44:51 +0000 |
| commit | 9e3c08db40b8916968b9f30096c7be3f00ce9647 (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /layout/style/test/test_redundant_font_download.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-upstream.tar.xz thunderbird-upstream.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/style/test/test_redundant_font_download.html')
| -rw-r--r-- | layout/style/test/test_redundant_font_download.html | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/layout/style/test/test_redundant_font_download.html b/layout/style/test/test_redundant_font_download.html new file mode 100644 index 0000000000..c6930ae401 --- /dev/null +++ b/layout/style/test/test_redundant_font_download.html @@ -0,0 +1,131 @@ +<!DOCTYPE HTML> +<html> +<!-- https://bugzilla.mozilla.org/show_bug.cgi?id=879963 --> +<head> + <meta charset="utf-8"> + <title>Test for bug 879963</title> + <script src="/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> +</head> + +<body> + <!-- Two <style> elements with identical @font-face rules. + Although multiple @font-face at-rules for the same family are legal, + and add faces to the family, we should NOT download the same resource + twice just because we have a duplicate face entry. --> + <style type="text/css"> + @font-face { + font-family: foo; + src: url("redundant_font_download.sjs?q=font"); + } + .test { + font-family: foo; + } + </style> + + <style type="text/css"> + @font-face { + font-family: foo; + src: url("redundant_font_download.sjs?q=font"); + } + .test { + font-family: foo; + } + </style> + + <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=879963">Mozilla Bug 879963</a> + + <div> + <!-- the 'init' request returns an image (just so we can see it's working) + and initializes the request logging in our sjs server --> + <img src="redundant_font_download.sjs?q=init"> + </div> + + <div id="test"> + Test + </div> + + <div> + <img id="image2" src=""> + </div> + + <script type="application/javascript"> + // helper to retrieve the server's request log as text, synchronously + function getRequestLog() { + var xmlHttp = new XMLHttpRequest(); + xmlHttp.open("GET", "redundant_font_download.sjs?q=report", false); + xmlHttp.send(null); + return xmlHttp.responseText; + } + + // retrieve just the most recent request the server has seen + function getLastRequest() { + return getRequestLog().split(";").pop(); + } + + // poll the server at intervals of animation frame callback until it has + // seen a specific request, or until maxTime ms have passed + function waitForRequest(request, maxTime, func) { + timeLimit = Date.now() + maxTime; + requestAnimationFrame(function rAF() { + var req = getLastRequest(); + if (req == request || Date.now() > timeLimit) { + func(); + return; + } + requestAnimationFrame(rAF); + }); + } + + // initially disable the second of the <style> elements, + // so we only have a single copy of the font-face + document.getElementsByTagName("style")[1].disabled = true; + + SimpleTest.waitForExplicitFinish(); + + // We perform a series of actions that trigger requests to the .sjs server, + // and poll the server's request log at each stage to check that it has + // seen the request we expected before we proceed to the next step. + function startTest() { + is(getRequestLog(), "init", "request log has been initialized"); + + // this should trigger a font download + document.getElementById("test").className = "test"; + + // wait to confirm that the server has received the request + waitForRequest("font", 5000, continueTest1); + } + + function continueTest1() { + is(getRequestLog(), "init;font", "server received font request"); + + // trigger a request for the second image, to provide an explicit + // delimiter in the log before we enable the second @font-face rule + document.getElementById("image2").src = "redundant_font_download.sjs?q=image"; + + waitForRequest("image", 5000, continueTest2); + } + + function continueTest2() { + is(getRequestLog(), "init;font;image", "server received image request"); + + // enable the second <style> element: we should NOT see a second font request, + // we expect waitForRequest to time out instead + document.getElementsByTagName("style")[1].disabled = false; + + waitForRequest("font", 1000, continueTest3); + } + + function continueTest3() { + is(getRequestLog(), "init;font;image", "should NOT have re-requested the font"); + + SimpleTest.finish(); + } + + waitForRequest("init", 5000, startTest); + + </script> + +</body> + +</html> |