option-element-constructor.html | Explore in Territory

<!DOCTYPE html>
<meta charset="utf-8">
<title>Option element constructor</title>
<link rel="author" title="Alex Pearson" href="mailto:[email protected]">
<link rel="help" href="https://html.spec.whatwg.org/#the-option-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<div id="parent">
  <div id="child" tabindex="0"></div>
</div>

<body>
<script>
  "use strict";

  test(() => {
    const option = new Option();

    assert_true(option instanceof HTMLOptionElement);

    assert_false(option.hasChildNodes());
    assert_false(option.hasAttribute("value"));
    assert_false(option.hasAttribute("selected"));
    assert_false(option.selected);

    assert_equals(option.textContent, "");
    assert_equals(option.value, "");
  }, "Option constructor with no arguments");

  test(() => {
    const option = new Option(false, false);

    assert_true(option instanceof HTMLOptionElement);

    assert_true(option.hasChildNodes());
    assert_equals(option.childNodes.length, 1);
    assert_equals(option.childNodes[0].nodeType, Node.TEXT_NODE);
    assert_equals(option.childNodes[0].data, "false");
    assert_equals(option.getAttribute("value"), "false");
    assert_false(option.hasAttribute("selected"));
    assert_false(option.selected);

    assert_equals(option.textContent, "false");
    assert_equals(option.value, "false");
  }, "Option constructor with falsy arguments");

  test(() => {
    const option = new Option("text", "value");

    assert_true(option.hasChildNodes());
    assert_equals(option.childNodes.length, 1);
    assert_equals(option.childNodes[0].nodeType, Node.TEXT_NODE);
    assert_equals(option.childNodes[0].data, "text");
    assert_equals(option.getAttribute("value"), "value");
    assert_false(option.hasAttribute("selected"));
    assert_false(option.selected);

    assert_equals(option.textContent, "text");
    assert_equals(option.value, "value");
  }, "Option constructor creates HTMLOptionElement with specified text and value");

  test(() => {
    const notSelected = new Option("text", "value", false);
    const selected = new Option("text", "value", true);

    assert_false(notSelected.hasAttribute("selected"));
    assert_equals(notSelected.getAttribute("selected"), null);
    assert_false(notSelected.selected);

    assert_equals(selected.getAttribute("selected"), "");
    assert_false(selected.selected);
  }, "Option constructor handles selectedness correctly when specified with defaultSelected only");

  test(() => {
    const notSelected = new Option("text", "value", true, false);
    const selected = new Option("text", "value", false, true);

    assert_equals(notSelected.selected, false);
    assert_equals(selected.selected, true);
  }, "Option constructor handles selectedness correctly, even when incongruous with defaultSelected");

  test(() => {
    const option = new Option(undefined, undefined);

    assert_false(option.hasChildNodes());
    assert_false(option.hasAttribute("value"));

    assert_equals(option.textContent, "");
    assert_equals(option.value, "");
  }, "Option constructor treats undefined text and value correctly");

  test(() => {
    const option = new Option("", "");

    assert_false(option.hasChildNodes());
    assert_true(option.hasAttribute("value"));

    assert_equals(option.textContent, "");
    assert_equals(option.value, "");
  }, "Option constructor treats empty text and value correctly");

  test(() => {
    const option = new Option("text", "value", 0, "");

    assert_false(option.hasAttribute("selected"));
    assert_false(option.selected);
  }, "Option constructor treats falsy selected and defaultSelected correctly");

  test(() => {
    const option = new Option("text", "value", {}, 1);

    assert_true(option.hasAttribute("selected"));
    assert_true(option.selected);
  }, "Option constructor treats truthy selected and defaultSelected correctly");

  test(() => {
    const option = new Option("text", "value", false, true);

    assert_false(option.hasAttribute("selected"));
    assert_true(option.selected);

    option.setAttribute("selected", "");
    assert_true(option.selected);

    option.removeAttribute("selected");
    assert_false(option.selected);
  }, "Option constructor does not set dirtiness (so, manipulating the selected content attribute still updates the " +
     "selected IDL attribute)");

  test(function() {
    var option = new Option();
    assert_equals(Object.getPrototypeOf(option), HTMLOptionElement.prototype);
  }, "Prototype of object created with named constructor");
</script>
chromium/third_party/blink/web_tests/external/wpt/html/semantics/forms/the-option-element/option-element-constructor.html
