[t/spec] Refactor sin tests a bit more, and add a full set of sin tests on Rats.
[t/spec] Refactor sin tests a bit more, and add a full set of sin tests on Rats.

git-svn-id: 53605643c415f7495558be95614cf14171f1db78@28187 c213334d-75ef-0310-aa23-eaa082d1ae64

niner/roast,laben/roast,zostay/roast,laben/roast,perl6/roast,b2gills/roast,dankogai/roast,dogbert17/roast,cygx/roast,b2gills/roast,skids/roast,dankogai/roast,bitrauser/roast,dogbert17/roast,skids/roast,niner/roast,bitrauser/roast,skids/roast,dankogai/roast,cygx/roast,b2gills/roast,zostay/roast,zostay/roast,niner/roast,laben/roast,cygx/roast