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Test Info: Errors
- This test failed 14 times in the preceding 30 days. quicksearch this test
- Manifest: browser/base/content/test/performance/browser.toml
/* Any copyright is dedicated to the Public Domain.
"use strict";
/*
* This test ensures that there is no unexpected flicker
* on the first window opened during startup.
*/
add_task(async function () {
let startupRecorder =
Cc["@mozilla.org/test/startuprecorder;1"].getService().wrappedJSObject;
await startupRecorder.done;
// Ensure all the frame data is in the test compartment to avoid traversing
// a cross compartment wrapper for each pixel.
let frames = Cu.cloneInto(startupRecorder.data.frames, {});
ok(!!frames.length, "Should have captured some frames.");
let unexpectedRects = 0;
let alreadyFocused = false;
for (let i = 1; i < frames.length; ++i) {
let frame = frames[i],
previousFrame = frames[i - 1];
let rects = compareFrames(frame, previousFrame);
if (!alreadyFocused && isLikelyFocusChange(rects, frame)) {
todo(
false,
rects.toSource()
);
continue;
}
alreadyFocused = true;
rects = rects.filter(rect => {
let width = frame.width;
let exceptions = [
/**
* Please don't add anything new unless justified!
*/
];
let rectText = `${rect.toSource()}, window width: ${width}`;
for (let e of exceptions) {
if (e.condition(rect)) {
todo(false, e.name + ", " + rectText);
return false;
}
}
ok(false, "unexpected changed rect: " + rectText);
return true;
});
if (!rects.length) {
info("ignoring identical frame");
continue;
}
// Before dumping a frame with unexpected differences for the first time,
// ensure at least one previous frame has been logged so that it's possible
// to see the differences when examining the log.
if (!unexpectedRects) {
dumpFrame(previousFrame);
}
unexpectedRects += rects.length;
dumpFrame(frame);
}
is(unexpectedRects, 0, "should have 0 unknown flickering areas");
});