94 lines
3 KiB
HTML
94 lines
3 KiB
HTML
<?xml version="1.0"?>
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<?xml-stylesheet href="chrome://global/skin" type="text/css"?> <?xml-stylesheet
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href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
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<window
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title="Popup Reflow Tests"
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xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
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>
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<panel id="testPanel" type="arrow" noautohide="true"> </panel>
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<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
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<script>
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<![CDATA[
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let panel, anchor;
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// A reflow observer - it just remembers the stack trace of all sync reflows
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// done by the panel.
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let observer = {
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reflows: [],
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reflow () {
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// Ignore reflows triggered by native code
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// (Reflows from native code only have an empty stack after the first frame)
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var path = (new Error().stack).split("\n").slice(1).join("");
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if (path === "") {
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return;
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}
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this.reflows.push(new Error().stack);
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},
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reflowInterruptible () {
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// We're not interested in interruptible reflows. Why, you ask? Because
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// we've simply cargo-culted this test from browser_tabopen_reflows.js!
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},
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QueryInterface: ChromeUtils.generateQI(["nsIReflowObserver",
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"nsISupportsWeakReference"])
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};
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// A test utility that counts the reflows caused by a test function. If the
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// count of reflows isn't what is expected, it causes a test failure and logs
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// the stack trace of all seen reflows.
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function countReflows(testfn, expected) {
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return new Promise(resolve => {
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observer.reflows = [];
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let docShell = panel.ownerGlobal.docShell;
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docShell.addWeakReflowObserver(observer);
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testfn().then(() => {
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docShell.removeWeakReflowObserver(observer);
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SimpleTest.is(observer.reflows.length, expected, "correct number of reflows");
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if (observer.reflows.length != expected) {
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SimpleTest.info("stack traces of reflows:\n" + observer.reflows.join("\n") + "\n");
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}
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resolve();
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});
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});
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}
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function openPopup() {
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return new Promise(resolve => {
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panel.addEventListener("popupshown", function popupshown() {
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resolve();
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}, {once: true});
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panel.openPopup(anchor, "before_start");
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});
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}
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// ********************
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// The actual tests...
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// We only have one atm - simply open a popup.
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//
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function testSimplePanel() {
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return openPopup();
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}
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// ********************
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// The test harness...
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//
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SimpleTest.waitForExplicitFinish();
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addEventListener("load", function() {
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anchor = document.getElementById("anchor");
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panel = document.getElementById("testPanel");
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// and off we go...
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countReflows(testSimplePanel, 0).then(SimpleTest.finish);
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});
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]]>
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</script>
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<body xmlns="http://www.w3.org/1999/xhtml">
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<p>The anchor --> <span id="anchor">v</span> <--</p>
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</body>
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</window>
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