suite.asyncTest('target (each editor should have a different target)', function (_, done) {
    const maxCount = document.querySelectorAll('.elm-even').length;
    const elm1 = document.getElementById('elm-1');
    let count = 0;
    const targets = [];

    EditorManager.init({
      selector: '.elm-even',
      target: elm1,
      skin_url: '/project/js/tinymce/skins/lightgray',
      init_instance_callback (ed) {
        LegacyUnit.equal(ed.targetElm !== elm1, true, 'target option ignored');
        LegacyUnit.equal(Tools.inArray(ed.targetElm, targets), -1);

        targets.push(ed.targetElm);

        if (++count >= maxCount) {
          teardown(done);
        }
      }
    });
  });

 return rel.filter(function (val) {
   return Tools.inArray(rules, val) === -1;
 });

 const hasPlugin = function (editor, plugin) {
   const plugins = editor.settings.plugins ? editor.settings.plugins : '';
   return Tools.inArray(plugins.split(/[ ,]/), plugin) !== -1;
 };

 Tools.each(obj, function (o) {
   if (Tools.inArray(val, o.nodeName.toLowerCase()) !== -1 && o.specified) {
     count++;
   }
 });

const overrideFormats = function (editor) {
  const alignElements = 'p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li,table,img',
    fontSizes = Tools.explode(editor.settings.font_size_style_values),
    schema = editor.schema;

  // Override some internal formats to produce legacy elements and attributes
  editor.formatter.register({
    // Change alignment formats to use the deprecated align attribute
    alignleft: { selector: alignElements, attributes: { align: 'left' } },
    aligncenter: { selector: alignElements, attributes: { align: 'center' } },
    alignright: { selector: alignElements, attributes: { align: 'right' } },
    alignjustify: { selector: alignElements, attributes: { align: 'justify' } },

    // Change the basic formatting elements to use deprecated element types
    bold: [
      { inline: 'b', remove: 'all' },
      { inline: 'strong', remove: 'all' },
      { inline: 'span', styles: { fontWeight: 'bold' } }
    ],
    italic: [
      { inline: 'i', remove: 'all' },
      { inline: 'em', remove: 'all' },
      { inline: 'span', styles: { fontStyle: 'italic' } }
    ],
    underline: [
      { inline: 'u', remove: 'all' },
      { inline: 'span', styles: { textDecoration: 'underline' }, exact: true }
    ],
    strikethrough: [
      { inline: 'strike', remove: 'all' },
      { inline: 'span', styles: { textDecoration: 'line-through' }, exact: true }
    ],

    // Change font size and font family to use the deprecated font element
    fontname: { inline: 'font', attributes: { face: '%value' } },
    fontsize: {
      inline: 'font',
      attributes: {
        size (vars) {
          return Tools.inArray(fontSizes, vars.value) + 1;
        }
      }
    },

    // Setup font elements for colors as well
    forecolor: { inline: 'font', attributes: { color: '%value' } },
    hilitecolor: { inline: 'font', styles: { backgroundColor: '%value' } }
  });

  // Check that deprecated elements are allowed if not add them
  Tools.each('b,i,u,strike'.split(','), function (name) {
    schema.addValidElements(name + '[*]');
  });

  // Add font element if it's missing
  if (!schema.getElementRule('font')) {
    schema.addValidElements('font[face|size|color|style]');
  }

  // Add the missing and depreacted align attribute for the serialization engine
  Tools.each(alignElements.split(','), function (name) {
    const rule = schema.getElementRule(name);

    if (rule) {
      if (!rule.attributes.align) {
        rule.attributes.align = {};
        rule.attributesOrder.push('align');
      }
    }
  });
};

const isCorsImage = function (editor, img) {
  return Tools.inArray(editor.settings.imagetools_cors_hosts, new URI(img.src).host) !== -1;
};