console-timing-missing-label-warnings.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /console/console-timing-missing-label-warnings.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Console Timing Missing Label Warnings - Tentative</title>

<link rel="help" href="https://console.spec.whatwg.org/#timing">

<meta name="assert" content="timeLog/timeEnd on a missing label should produce warning output observable via BiDi log.entryAdded">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/testdriver.js?feature=bidi"></script>

<script src="/resources/testdriver-vendor.js"></script>

<script src="/console/helper.js"></script>

<script>

promise_test(async (t) => {

  const unsubscribe =

      await test_driver.bidi.log.entry_added.subscribe({ contexts: [window] });

  t.add_cleanup(async () => await unsubscribe());

  const missing_label = "__wpt_missing_timer__";

  const missing_label_ops = [

    () => console.timeLog(missing_label),

    () => console.timeEnd(missing_label),

];

  const expected_warning_count = missing_label_ops.length;

  const warningsPromise = waitForConsoleEntries(t, {

    count: expected_warning_count,

    accept: (entry) => typeof entry.text === "string" && entry.text.includes(missing_label),

});

  for (const op of missing_label_ops) op();

  const warnings = await warningsPromise;

  assert_equals(warnings.length, expected_warning_count);

  for (const warning of warnings) {

    assert_true(typeof warning.text === "string" && warning.text.length > 0);

    assert_true(warning.text.includes(missing_label));

}, "Missing-label timeLog/timeEnd produce observable warning output");

</script>