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Diffstat (limited to 'layout/style/test/test_flushing_frame.html')
| -rw-r--r-- | layout/style/test/test_flushing_frame.html | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/layout/style/test/test_flushing_frame.html b/layout/style/test/test_flushing_frame.html new file mode 100644 index 0000000000..fa6d751647 --- /dev/null +++ b/layout/style/test/test_flushing_frame.html @@ -0,0 +1,40 @@ +<!doctype html> +<meta charset="utf-8"> +<title> + Test for bug 1545516: We don't flush layout unnecessarily on the parent + document when the frame is already disconnected. +</title> +<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez"> +<script src="/tests/SimpleTest/SimpleTest.js"></script> +<div id="content"></div> +<script> + SimpleTest.waitForExplicitFinish(); + const iframe = document.createElement("iframe"); + const content = document.querySelector("#content"); + const parentUtils = SpecialPowers.getDOMWindowUtils(window); + iframe.onload = function() { + const win = iframe.contentWindow; + iframe.offsetTop; // flush layout + content.style.display = "inline"; // Dirty style with something that will reframe. + + const previousConstructCount = parentUtils.framesConstructed; + let pagehideRan = false; + win.addEventListener("pagehide", function() { + pagehideRan = true; + win.foo = win.innerWidth; + is(parentUtils.framesConstructed, previousConstructCount, "innerWidth shouldn't have flushed parent document layout") + win.bar = win.document.documentElement.offsetHeight; + is(parentUtils.framesConstructed, previousConstructCount, "offsetHeight shouldn't have flushed parent document layout") + win.baz = win.getComputedStyle(win.document.documentElement).color; + is(parentUtils.framesConstructed, previousConstructCount, "getComputedStyle shouldn't have flushed parent document layout") + }); + + iframe.remove(); // Remove the iframe + is(pagehideRan, true, "pagehide handler should've ran"); + is(parentUtils.framesConstructed, previousConstructCount, "Nothing should've flushed the parent document layout yet"); + content.offsetTop; + isnot(parentUtils.framesConstructed, previousConstructCount, "We should've flushed layout now"); + SimpleTest.finish(); + }; + document.body.appendChild(iframe); +</script> |