| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title id='title'>HTMLOptionsCollection</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <div id="log"></div> |
| <select id="selly"> |
| <option>1</option> |
| <option>2</option> |
| <option>3</option> |
| <option>4</option> |
| </select> |
| |
| <script> |
| var selly; |
| setup(function() { |
| selly = document.getElementById('selly'); |
| }); |
| |
| test(function () { |
| assert_equals(selly.length, 4); |
| }, "On getting, the length attribute must return the number of nodes represented by the collection."); |
| |
| test(function () { |
| selly.length = 7; |
| assert_equals(selly.length, 7, |
| "Number of nodes in collection should have changed"); |
| assert_equals(selly.children.length, 7, |
| "Number of children should have changed"); |
| for (var i = 4; i < 7; ++i) { |
| var child = selly.children[i]; |
| assert_equals(child.localName, "option", |
| "new child should be an option"); |
| assert_equals(child.namespaceURI, "http://www.w3.org/1999/xhtml", |
| "new child should be an HTML element"); |
| assert_equals(child.attributes.length, 0, |
| "new child should not have attributes"); |
| assert_equals(child.childNodes.length, 0, |
| "new child should not have child nodes"); |
| } |
| }, "Changing the length adds new nodes; The number of new nodes = new length minus old length"); |
| |
| test(function () { |
| var elarray = []; |
| for (var i = 0; i < selly.length; i++) { |
| elarray.push(selly[i].value); |
| } |
| assert_array_equals(elarray, ["1", "2", "3", "4", "", "", ""]); |
| }, "New nodes have no value"); |
| |
| test(function () { |
| selly.length = 7; |
| assert_equals(selly.length, 7, |
| "Number of nodes in collection should not have changed"); |
| assert_equals(selly.children.length, 7, |
| "Number of children should not have changed"); |
| }, "Setting a length equal to existing length changes nothing"); |
| |
| test(function () { |
| selly.length = 4; |
| assert_equals(selly[6], undefined, |
| "previously set node is now undefined"); |
| assert_equals(selly.length, 4, |
| "Number of nodes in collection is correctly changed"); |
| assert_equals(selly.children.length, 4, |
| "Number of children should have changed"); |
| }, "Setting a length lower than the old length trims nodes from the end"); |
| </script> |
