Ideographic, less than 4 common characters at line end
Test passes if you see a single line with no spaces after the 3.
Assertion: The source text [ideographic characters + common character + line break + ideographic characters] will display as a single line with no white space in it.
The assumptions this test makes about expected behaviour are based on the white-space processing rules described in CSS3. The common characters will be ignored during line break transformation. Since the context is East Asian, the line break will be removed.