blob: 45d26cdd0cd3c8278a8bb0d602ba9e1f266ef96a [file] [log] [blame]
<!DOCTYPE HTML>
<html>
<head>
<script src="../resources/js-test-pre.js"></script>
</head>
<body>
<script>
description("Ensure PerformanceObservers are notified in order of registration (observe).");
window.jsTestIsAsync = true;
window.count = 0;
let observer1 = new PerformanceObserver((list) => {
count++;
testPassed("PerformanceObserver 1 callback fired");
shouldBe(`count`, `1`);
});
let observer2 = new PerformanceObserver((list) => {
count++;
testPassed("PerformanceObserver 2 callback fired");
shouldBe(`count`, `2`);
});
// Ensure creation doesn't impact order.
let observerSpecial = new PerformanceObserver((list) => {
count++;
testPassed("PerformanceObserver 6 callback fired");
shouldBe(`count`, `6`);
finishJSTest();
});
let observer3 = new PerformanceObserver((list) => {
count++;
testPassed("PerformanceObserver 3 callback fired");
shouldBe(`count`, `3`);
});
let observer4 = new PerformanceObserver((list) => {
count++;
testPassed("PerformanceObserver 4 callback fired");
shouldBe(`count`, `4`);
});
let observer5 = new PerformanceObserver((list) => {
count++;
testPassed("PerformanceObserver 5 callback fired");
shouldBe(`count`, `5`);
});
// Register all in order.
for (let o of [observer1, observer2, observerSpecial, observer3, observer4, observer5])
o.observe({entryTypes: ["mark"]});
// Unregister and re-register moves this to the back of the line.
observerSpecial.disconnect();
observerSpecial.observe({entryTypes: ["mark"]});
performance.mark("mark1");
</script>
<script src="../resources/js-test-post.js"></script>
</body>
</html>