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<!DOCTYPE HTML>
<meta charset=utf-8>
<title>PerformanceObservers: observe</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="performanceobservers.js"></script>
<h1>PerformanceObservers: observe</h1>
<div id="log"></div>
<script>
test(function () {
var obs = new PerformanceObserver(function () { return true; });
assert_throws(new TypeError(), function () {
obs.observe({});
});
assert_throws(new TypeError(), function () {
obs.observe({entryType: []});
});
}, "no entryTypes throws a TypeError");
test(function () {
var obs = new PerformanceObserver(function () { return true; });
assert_throws(new TypeError(), function () {
obs.observe({entryTypes: "mark"});
});
assert_throws(new TypeError(), function () {
obs.observe({entryTypes: []});
});
assert_throws(new TypeError(), function () {
obs.observe({entryTypes: ["this-cannot-match-an-entryType"]});
});
assert_throws(new TypeError(), function () {
obs.observe({entryTypes: ["marks","navigate", "resources"]});
});
}, "Empty sequence entryTypes throws a TypeError");
test(function () {
var obs = new PerformanceObserver(function () { return true; });
obs.observe({entryTypes: ["mark","this-cannot-match-an-entryType"]});
obs.observe({entryTypes: ["this-cannot-match-an-entryType","mark"]});
obs.observe({entryTypes: ["mark"], others: true});
}, "Filter unsupported entryType entryType names within the entryTypes sequence");
async_test(function (t) {
var observer = new PerformanceObserver(
t.step_func(function (entryList, obs) {
assert_equals(observer, obs, "observer is second parameter");
checkEntries(entryList.getEntries(),
[{ entryType: "measure", name: "measure1"}]);
observer.disconnect();
t.done();
})
);
performance.clearMarks();
observer.observe({entryTypes: ["mark"]});
observer.observe({entryTypes: ["measure"]});
performance.mark("mark1");
performance.measure("measure1");
}, "replace observer if already present");
</script>
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