HTML5 input attribute core tests

attrTests: {
  testAccept: function(_el) {
    return !!(_el.accept === '') && !!(_el.accept !== 'undefined');
  },

  testAutocomplete: function(_el){
    return !!(_el.autocomplete === '') && !!(_el.autocomplete !== 'undefined');
  },
  
  testAutofocus: function(_el){
    return !!(_el.autofocus === false) && !!(_el.autofocus !== 'undefined');
  },
  
  testChecked: function(_el) {
    return !!(_el.checked === false) && !!(_el.checekd !== 'undefined');
  },
  
  testList: function(_el){
    return !!(typeof _el.list === 'object') && !!(_el.list !== 'undefined');
  },
  
  testMax: function(_el){
    //feature test for validity object first
    if (typeof _el.validity === 'object'){
      return !!(_el.validity.rangeOverflow === false);
    } else {
      return false;
    }
  },
  
  testMaxlength: function(_el) {
    //webkit sets default maxlength to 524288, gecko and presto to -1
    return (!!(_el.maxLength === -1) || !!(_el.maxLength === 524288)) && !!(_el.maxLength !== 'undefined');
  },
  
  testMin: function(_el) {
    //feature test for validity object first
    if (typeof _el.validity === 'object'){
      return !!(_el.validity.rangeUnderflow === false);
    } else {
      return false;
    }
  },
  
  testMultiple: function(_el) {
    return (!!(_el.multiple === false) && !!(_el.multiple !== 'undefined'));
  },
  
  testPattern: function(_el) {
    return !!(_el.pattern === '') && !!(_el.pattern !== 'undefined');
  },
  
  testPlaceholder: function(_el) {
    return !!(_el.placeholder === '') && !!(_el.placeholder !== 'undefined');
  },
  
  testReadOnly: function(_el) {
    return !!(_el.readOnly === false) && !!(_el.readOnly !== 'undefined');
  },
  
  testRequired: function(_el) {
    return !!(_el.required === false) && !!(_el.required !== 'undefined');
  },
  
  testSize: function(_el) {
    // webkit sets default size to 20, gecko and presto to 0
    return (!!(_el.size === 0) || !!(_el.size === 20)) && !!(_text.size !== 'undefined');
  },
  
  testStep: function(_el) {
    //feature test for validity object first
    if (typeof _el.validity === 'object'){
      return !!(_el.validity.stepMismatch === false);
    } else {
      return false;
    }
  }
}