Tests that the url fragment is reported by Page.frameNavigated.
No Fragment
url = simple-iframe.html
urlFragment = undefined
UnreachableUrl = undefined

Empty Fragment
url = simple-iframe.html
urlFragment = #
UnreachableUrl = undefined

Normal Fragment
url = simple-iframe.html
urlFragment = #fragment
UnreachableUrl = undefined

Unreachable Fragment
url = chrome-error://chromewebdata/
urlFragment = undefined
UnreachableUrl = idont_exist.html#fragment