test_texteditor_textnode.html

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<!DOCTYPE html>

<meta charset="utf-8">

<title>Test for Bug 1713334</title>

<script src="/tests/SimpleTest/SimpleTest.js"></script>

<script src="/tests/SimpleTest/EventUtils.js"></script>

<link rel="stylesheet" href="/tests/SimpleTest/test.css">

<input id="input">

<textarea id="textarea"></textarea>

<script>

"use strict";

function assertChild(div, content) {

  const name = div.parentElement.localName;

  is(div.firstChild.nodeType, Node.TEXT_NODE, `<${name}>: The first node of the root element must be a text node`);

  is(div.firstChild.textContent, content, `<${name}>: The content of the text node is wrong`);

function test(element) {

  element.focus();

  const { rootElement } = SpecialPowers.wrap(element).editor;

  assertChild(rootElement, "");

  element.value = "";

  assertChild(rootElement, "");

  element.value = "foo"

  assertChild(rootElement, "foo");

  element.value = "";

  assertChild(rootElement, "");

  element.value = "foo";

  const selection =

    SpecialPowers.wrap(element).

    editor.

    selectionController.getSelection(

      SpecialPowers.Ci.nsISelectionController.SELECTION_NORMAL

);

  selection.setBaseAndExtent(rootElement, 0, rootElement, 1);

  document.execCommand("delete");

  assertChild(rootElement, "");

SimpleTest.waitForExplicitFinish();

SimpleTest.waitForFocus(() => {

  test(document.all.input);

  test(document.all.textarea);

  SimpleTest.finish();

});

</script>