1 files changed, 24 insertions, 0 deletions
diff --git a/testing/web-platform/tests/paint-timing/fcp-only/fcp-text-input.html b/testing/web-platform/tests/paint-timing/fcp-only/fcp-text-input.html
new file mode 100644
index 0000000000..e50449abbe
--- /dev/null
+++ b/testing/web-platform/tests/paint-timing/fcp-only/fcp-text-input.html
@@ -0,0 +1,24 @@
+<!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>