1 This tests accessing the length after accessing (length + 1)-th item in HTMLCollection doesn't cache a wrong length.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS children = container.children; children.length is 0
7 PASS container.appendChild(span); children[1]; children.length is 1
8 PASS container.removeChild(span); children.length is 0
9 PASS successfullyParsed is true