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Test Info: Warnings

<!doctype html>
<meta charset="utf-8">
<title>This test validates that PerformanceResourceTiming's toJSON method
contains all of the entry's attributes.</title>
<link rel="author" title="Google" href="" />
<link rel="help"
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
promise_test(() => {
return new Promise((resolve, reject) => {
const po = new PerformanceObserver(list => {
const entries = list.getEntries();
if (entries.length < 1) {
throw new Error(`No entries to run the test with.`);
assert_greater_than_equal(entries.length, 1);
const entry = entries[0];
assert_equals(typeof(entry.toJSON), 'function');
const json = entry.toJSON();
assert_equals(typeof(json), 'object');
const performanceResourceTimingKeys = [
for (const key of performanceResourceTimingKeys) {
try {
assert_false(json[key] === undefined,
`entry.toJSON().${key} is undefined`);
assert_equals(json[key], entry[key],
`entry.toJSON().${key} should match entry.${key}`);
} catch(e) {
po.observe({type: "resource", buffered: true});
}, 'Test toJSON() in PerformanceResourceTiming');