fcp-text-input.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /paint-timing/fcp-only/fcp-text-input.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<head>

<title>Performance Paint Timing Test: FCP due for non-empty text input</title>

</head>

<body>

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

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

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

<input id="input" type="text" />

<script>

  setup({"hide_test_state": true});

  promise_test(async t => {

      assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");

      await new Promise(r => window.addEventListener('load', r));

      await assertNoFirstContentfulPaint(t);

      const input = document.getElementById('input');

      input.setAttribute('value', '  ');

      await assertNoFirstContentfulPaint(t);

      input.setAttribute('value', 'value');

      await assertFirstContentfulPaint(t);

  }, 'Text input should become contentful when its value is non-empty');

</script>

</body>

</html>