1 files changed, 55 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/interactive-elements/the-dialog-element/inert-node-is-uneditable.html b/testing/web-platform/tests/html/semantics/interactive-elements/the-dialog-element/inert-node-is-uneditable.html
new file mode 100644
index 0000000000..9141a383b0
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/interactive-elements/the-dialog-element/inert-node-is-uneditable.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<link rel=author href="mailto:jarhar@chromium.org">
+<link rel=author href="mailto:falken@chromium.org">
+<link rel=help href="https://html.spec.whatwg.org/multipage/interactive-elements.html#the-dialog-element">
+<link rel=help href="https://bugs.chromium.org/p/chromium/issues/detail?id=252071">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+
+<span id="not-editable" contenteditable>I'm not editable while the dialog is showing.</span>
+<dialog>
+  <span id="editable" contenteditable>I'm editable.</span>
+</dialog>
+
+<script>
+promise_test(async () => {
+  async function clickOn(element) {
+    let absoluteTop = 0;
+    let absoluteLeft = 0;
+    for (let parentNode = element; parentNode; parentNode = parentNode.offsetParent) {
+      absoluteLeft += parentNode.offsetLeft;
+      absoluteTop += parentNode.offsetTop;
+    }
+
+    const x = Math.round(absoluteLeft + element.offsetWidth / 2);
+    const y = Math.round(absoluteTop + element.offsetHeight / 2);
+    const actions = new test_driver.Actions()
+      .pointerMove(x, y)
+      .pointerDown()
+      .pointerUp()
+      .pointerMove(0, 0);
+    await actions.send();
+  }
+
+  dialog = document.querySelector('dialog');
+  dialog.showModal();
+  notEditable = document.querySelector('#not-editable');
+  editable = document.querySelector('#editable');
+
+  await clickOn(notEditable);
+  oldValue = notEditable.textContent;
+  await (new test_driver.Actions().keyDown('a').keyUp('a').send());
+  assert_equals(notEditable.textContent, oldValue);
+
+  await clickOn(editable);
+  oldValue = editable.textContent;
+  await (new test_driver.Actions().keyDown('a').keyUp('a').send());
+  assert_not_equals(editable.textContent, oldValue);
+
+  notEditable.remove();
+  editable.remove();
+}, 'Test that inert nodes cannot be edited. The test passes if the only text you can edit is in the dialog.');
+</script>