chromium/third_party/blink/web_tests/editing/spelling/mispelled_word_context_menu_prevented_no_selection.html

<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../resources/gesture-util.js"></script>

<body onload="onLoad()">
  <h2>Default action on Context Menu for misspelled word prevented</h2>
  <p>
    If there is
    a contextmenu handler that prevents the default action then when mouse is
    positioned on a misspelled word and right click is pressed, the misspelled word
    should not be selected.
  </p>
  <div id="text" contenteditable>
    Wellcome
  </div>
<script>
  function onLoad(){
    let textDiv = document.getElementById("text");
    let finishedContextMenuEvent = false;
    textDiv.addEventListener("contextmenu", (event)=>{
      event.preventDefault();
      finishedContextMenuEvent = true;
    });
    function inject_actions(x, y){
      return new Promise((resolve, reject)=>{
        if(chrome.gpuBenchmarking){
           chrome.gpuBenchmarking.pointerActionSequence( [
            {source: 'mouse',
             actions: [
                { name: 'pointerDown', x: x, y: y, button: 2 /*RIGHT button*/},
                { name: 'pointerUp', x: x, y: y, button: 2 /*RIGHT button*/}
             ]
            }], resolve);
         }
         else
          reject();
      });
    }
    promise_test((test) => new Promise(async (resolve, reject)=>{
      let bounding_rect = textDiv.getBoundingClientRect();
      let x = bounding_rect.x;
      let y = bounding_rect.y + 10;
      // right click on misspelled word "Wellcome"
      await inject_actions(x, y);
      await waitFor(() => finishedContextMenuEvent, "ContextMenu event not fired");
      test.step(() => {
        let selection = getSelection();
        assert_equals(selection.type, "Caret", "The cursor should be on text");
        assert_true(selection.isCollapsed, "The selection should be empty");
      });
      resolve();
    }), "No word selection if right click on misspelled word and contextmenu action prevented");
  }
</script>
</body>