This test is a dump-render-tree test which makes sure that the following properties are appropriately applied:

The test passes if there is a particular sequence of checks and x characters below. Note that some x characters are expected.
AA BB AA BB AA BB AA BB AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA
AA BB AA BB AA BB AA BB AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA