user-select selection tests

aaaaaaa~~bbbbbbbb~~ccccccc

~~aaaaaaa~~bbbbbbbbccccccc

aaaaaaabbbbbbbb~~ccccccc~~

aaaaaaa~~bbbbbbbb~~ccccccc

~~aaaaaaa~~bbbbbbbbccccccc

aaaaaaabbbbbbbb~~ccccccc~~

aaaaaaa~~bbbbbbbb~~ccccccc

~~aaaaaaa~~bbbbbbbbccccccc

aaaaaaabbbbbbbb~~ccccccc~~

aaaaaaabbb~~bbbbb~~ccccccc

~~aaaa~~aaabbbbbbbbccccccc

aaaaaaabbbbbbbbccccccc

aaa~~aaaabbbbddccccddddddd~~eeee

aaabbb~~ccc~~ddd

aaaa

bbbb

aaaa
x
x
x

bbbb

aaaa
x

bbbbbbb