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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>