|  | # split | 
|  | assert_eq('h i'.split(' '), ['h', 'i']) | 
|  | assert_eq('h i p'.split(' '), ['h', 'i', 'p']) | 
|  | assert_eq('a,e,i,o,u'.split(',', 2), ['a', 'e', 'i,o,u']) | 
|  | assert_eq('  1  2  3  '.split(' '), ['', '', '1', '', '2', '', '3', '', '']) | 
|  |  | 
|  | # rsplit | 
|  | assert_eq('abcdabef'.rsplit('ab'), ['', 'cd', 'ef']) | 
|  | assert_eq('google_or_gogol'.rsplit('go'), ['', 'ogle_or_', '', 'l']) | 
|  |  | 
|  | # rsplit regex | 
|  | assert_eq('foo/bar.lisp'.rsplit('.'), ['foo/bar', 'lisp']) | 
|  | assert_eq('foo/bar.?lisp'.rsplit('.?'), ['foo/bar', 'lisp']) | 
|  | assert_eq('fwe$foo'.rsplit('$'), ['fwe', 'foo']) | 
|  | assert_eq('windows'.rsplit('\w'), ['windows']) | 
|  |  | 
|  | # rsplit no match | 
|  | assert_eq(''.rsplit('o'), ['']) | 
|  | assert_eq('google'.rsplit('x'), ['google']) | 
|  |  | 
|  | # rsplit separator | 
|  | assert_eq('xxxxxx'.rsplit('x'), ['', '', '', '', '', '', '']) | 
|  | assert_eq('xxxxxx'.rsplit('x', 1), ['xxxxx', '']) | 
|  | assert_eq('xxxxxx'.rsplit('x', 2), ['xxxx', '', '']) | 
|  | assert_eq('xxxxxx'.rsplit('x', 3), ['xxx', '', '', '']) | 
|  | assert_eq('xxxxxx'.rsplit('x', 4), ['xx', '', '', '', '']) | 
|  | assert_eq('xxxxxx'.rsplit('x', 5), ['x', '', '', '', '', '']) | 
|  | assert_eq('xxxxxx'.rsplit('x', 6), ['', '', '', '', '', '', '']) | 
|  | assert_eq('xxxxxx'.rsplit('x', 7), ['', '', '', '', '', '', '']) | 
|  |  | 
|  | # split max split | 
|  | assert_eq('google'.rsplit('o'), ['g', '', 'gle']) | 
|  | assert_eq('google'.rsplit('o'), ['g', '', 'gle']) | 
|  | assert_eq('google'.rsplit('o', 1), ['go', 'gle']) | 
|  | assert_eq('google'.rsplit('o', 2), ['g', '', 'gle']) | 
|  | assert_eq('google'.rsplit('o', 3), ['g', '', 'gle']) | 
|  | assert_eq('ogooglo'.rsplit('o'), ['', 'g', '', 'gl', '']) | 
|  | assert_eq('ogooglo'.rsplit('o', 1), ['ogoogl', '']) | 
|  | assert_eq('ogooglo'.rsplit('o', 2), ['ogo', 'gl', '']) | 
|  | assert_eq('ogooglo'.rsplit('o', 3), ['og', '', 'gl', '']) | 
|  | assert_eq('ogooglo'.rsplit('o', 4), ['', 'g', '', 'gl', '']) | 
|  | assert_eq('ogooglo'.rsplit('o', 5), ['', 'g', '', 'gl', '']) | 
|  | assert_eq('google'.rsplit('google'), ['', '']) | 
|  | assert_eq('google'.rsplit('google', 1), ['', '']) | 
|  | assert_eq('google'.rsplit('google', 2), ['', '']) |