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<!DOCTYPE html>
<meta charset="utf-8" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/soft-navigation-heuristics/resources/soft-navigation-test-helper.js"></script>
<button id="navigateButton">Click here!</button>
<h1>Heading!</h1>
<div id="content" elementtiming="content-text">Initial Text</div>
<div id="container"></div>
<script>
async function waitForExactlyOneElementTimingEntry(id, buffered) {
let entries = await new Promise(resolve => {
new PerformanceObserver((list, observer) => {
resolve(list.getEntries());
observer.disconnect();
}).observe({type: 'element', buffered});
});
assert_equals(
entries.length, 1,
`Expected exactly one ElementTiming entry for "${id}"`);
assert_equals(
entries[0].identifier, id,
`Unexpected ElementTiming entry: expected "${id}"`);
}
async function runTest(t, url, text) {
navigateButton.addEventListener('click', async () => {
// We expect to get a timing entry for this, but not a soft nav ICP entry.
// This lets us check that we don't get more than the initial timing entry
// for `content`.
const div = document.createElement("div");
div.innerHTML = `<div id="additional" elementtiming="${url}">hi</div>`;
container.appendChild(div);
content.innerText = text;
history.pushState({}, '', url);
}, {once: true});
// Set up the PerformanceObservers before clicking to avoid races,
// and use unbuffered here so we don't get duplicate entries.
const elementTimingPromise =
waitForExactlyOneElementTimingEntry(url, /*buffered=*/false);
const softNavPromise = SoftNavigationTestHelper.getPerformanceEntries(
"soft-navigation",
/* includeSoftNavigationObservations= */true,
/* minNumEntries= */ 1);
const icpPromise = SoftNavigationTestHelper.getPerformanceEntries(
"interaction-contentful-paint",
/* includeSoftNavigationObservations= */true,
/* minNumEntries= */ 1);
if (test_driver) {
test_driver.click(navigateButton);
}
const helper = new SoftNavigationTestHelper(t);
// Check if we detected a soft nav.
const softNavs = await helper.withTimeoutMessage(
softNavPromise, "Soft navigation not detected.", /*timeout=*/ 3000);
assert_equals(softNavs.length, 1, 'Expected exactly one soft navigation.');
assert_true(
softNavs[0].name.endsWith(url),
`Unexpected Soft Navigation URL. Expected url to end with ${url} but got ${softNavs[0].name}`);
// Check that we only get one ICP entry, and that it's for the node whose
// text we overwrote.
const icps = await helper.withTimeoutMessage(
icpPromise, 'ICP not detected.', /*timeout=*/ 3000);
assert_equals(icps.length, 1, 'Expected exactly one ICP entry.');
assert_equals(icps[0].id, 'content', 'Expected ICP candidate to be "content"');
// Finally, check to make sure we don't get an additional timing entry.
return elementTimingPromise;
}
// Wait for the initial text load and make its way through the text timing
// pipeline before changing its contents.
promise_setup(() => waitForExactlyOneElementTimingEntry('content-text', /*buffered=*/true));
promise_test(t => {
const url = 'soft-nav-1';
const text = 'The initial text has been replaced!';
return runTest(t, url, text);
}, 'Soft Navigation Detection supports replacing existing text');
promise_test(t => {
const url = 'soft-nav-2';
const text = 'The initial text has been replaced again!';
return runTest(t, url, text);
}, 'Soft Navigation Detection supports replacing existing text in multiple interactions');
</script>
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