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+" Test for gn command
+
+func Test_gn_command()
+  noa new
+  " replace a single char by itsself quoted:
+  call setline('.', 'abc x def x ghi x jkl')
+  let @/='x'
+  exe "norm! cgn'x'\<esc>.."
+  call assert_equal("abc 'x' def 'x' ghi 'x' jkl", getline('.'))
+  sil! %d_
+  " simple search match
+  call setline('.', 'foobar')
+  let @/='foobar'
+  exe "norm! gncsearchmatch"
+  call assert_equal('searchmatch', getline('.'))
+  sil! %d _
+  " replace a multi-line match
+  call setline('.', ['', 'one', 'two'])
+  let @/='one\_s*two\_s'
+  exe "norm! gnceins\<CR>zwei"
+  call assert_equal(['','eins','zwei'], getline(1,'$'))
+  sil! %d _
+  " test count argument
+  call setline('.', ['', 'abcdx | abcdx | abcdx'])
+  let @/='[a]bcdx'
+  exe "norm! 2gnd"
+  call assert_equal(['','abcdx |  | abcdx'], getline(1,'$'))
+  sil! %d _
+  " join lines
+  call setline('.', ['join ', 'lines'])
+  let @/='$'
+  exe "norm! 0gnd"
+  call assert_equal(['join lines'], getline(1,'$'))
+  sil! %d _
+  " zero-width match
+  call setline('.', ['', 'zero width pattern'])
+  let @/='\>\zs'
+  exe "norm! 0gnd"
+  call assert_equal(['', 'zerowidth pattern'], getline(1,'$'))
+  sil! %d _
+  " delete first and last chars
+  call setline('.', ['delete first and last chars'])
+  let @/='^'
+  exe "norm! 0gnd$"
+  let @/='\zs'
+  exe "norm! gnd"
+  call assert_equal(['elete first and last char'], getline(1,'$'))
+  sil! %d _
+  " using visual mode
+  call setline('.', ['', 'uniquepattern uniquepattern'])
+  exe "norm! /[u]niquepattern/s\<cr>vlgnd"
+  call assert_equal(['', ' uniquepattern'], getline(1,'$'))
+  sil! %d _
+  " backwards search
+  call setline('.', ['my very excellent mother just served us nachos'])
+  let @/='mother'
+  exe "norm! $cgNmongoose"
+  call assert_equal(['my very excellent mongoose just served us nachos'], getline(1,'$'))
+  sil! %d _
+  " search for single char
+  call setline('.', ['','for (i=0; i<=10; i++)'])
+  let @/='i'
+  exe "norm! cgnj"
+  call assert_equal(['','for (j=0; i<=10; i++)'], getline(1,'$'))
+  sil! %d _
+  " search hex char
+  call setline('.', ['','Y'])
+  set noignorecase
+  let @/='\%x59'
+  exe "norm! gnd"
+  call assert_equal(['',''], getline(1,'$'))
+  sil! %d _
+  " test repeating gdn
+  call setline('.', ['', '1', 'Johnny', '2', 'Johnny', '3'])
+  let @/='Johnny'
+  exe "norm! dgn."
+  call assert_equal(['','1', '', '2', '', '3'], getline(1,'$'))
+  sil! %d _
+  " test repeating gUgn
+  call setline('.', ['', '1', 'Depp', '2', 'Depp', '3'])
+  let @/='Depp'
+  exe "norm! gUgn."
+  call assert_equal(['', '1', 'DEPP', '2', 'DEPP', '3'], getline(1,'$'))
+  sil! %d _
+  " test using look-ahead assertions
+  call setline('.', ['a:10', '', 'a:1', '', 'a:20'])
+  let @/='a:0\@!\zs\d\+'
+  exe "norm! 2nygno\<esc>p"
+  call assert_equal(['a:10', '', 'a:1', '1', '', 'a:20'], getline(1,'$'))
+  sil! %d _
+endfu
+
+" vim: tabstop=2 shiftwidth=0 expandtab