Write me a code that returns all the <article> tags of a DOM who has a span that contains "test" string.

function test() {
  var x = document.getElementsByTagName("article");
  for (var i = 0; i < x.length; i++) {
    var element = x[i].getElementsByTagName("span");
    for (var j = 0; j < element.length; j++) {
      if (element[j].innerHTML == "test") {
        console.log(x[i]);
      }
    }
  }
}