Harness status: OK

Found 4 tests

4 Pass
Pass	Script inserted after an iframe in the same appendChild() call can observe the iframe's non-null contentWindow
Pass	A script inserted atomically before an iframe (using a div) does not observe the iframe's contentWindow, since the 'script running' and 'iframe setup' both happen in order, after DOM insertion completes
Pass	A script inserted atomically before an iframe (using a DocumentFragment) does not observe the iframe's contentWindow, since the 'script running' and 'iframe setup' both happen in order, after DOM insertion completes
Pass	A script inserted atomically before an iframe (using a append() with multiple arguments) does not observe the iframe's contentWindow, since the 'script running' and 'iframe setup' both happen in order, after DOM insertion completes