" Test for breakindent
"
" Note: if you get strange failures when adding new tests, it might be that
" while the test is run, the breakindent caching gets in its way.
" It helps to change the tabstop setting and force a redraw (e.g. see
" Test_breakindent08())
source check.vim
CheckOption breakindent

source view_util.vim

let s:input ="\tabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOP"

func s:screen_lines(lnum, width) abort
  return ScreenLines([a:lnum, a:lnum + 2], a:width)
endfunc

func s:screen_lines2(lnums, lnume, width) abort
  return ScreenLines([a:lnums, a:lnume], a:width)
endfunc

func s:compare_lines(expect, actual)
  call assert_equal(join(a:expect, "\n"), join(a:actual, "\n"))
endfunc

func s:test_windows(...)
  call NewWindow(10, 20)
  setl ts=4 sw=4 sts=4 breakindent
  put =s:input
  exe get(a:000, 0, '')
endfunc

func s:close_windows(...)
  call CloseWindow()
  exe get(a:000, 0, '')
endfunc

func Test_breakindent01()
  " simple breakindent test
  call s:test_windows('setl briopt=min:0')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "    qrst",
	\ "    GHIJ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows()
endfunc

func Test_breakindent01_vartabs()
  " like 01 but with vartabs feature
  CheckFeature vartabs
  call s:test_windows('setl briopt=min:0 vts=4')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "    qrst",
	\ "    GHIJ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set vts&')
endfunc

func Test_breakindent02()
  " simple breakindent test with showbreak set
  set sbr=>>
  call s:test_windows('setl briopt=min:0 sbr=')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "    >>qr",
	\ "    >>EF",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr=')
endfunc

func Test_breakindent02_vartabs()
  CheckFeature vartabs
  " simple breakindent test with showbreak set
  call s:test_windows('setl briopt=min:0 sbr=>> vts=4')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "    >>qr",
	\ "    >>EF",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr= vts&')
endfunc

func Test_breakindent03()
  " simple breakindent test with showbreak set and briopt including sbr
  call s:test_windows('setl briopt=sbr,min:0 sbr=++')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "++  qrst",
	\ "++  GHIJ",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr=')
endfunc

func Test_breakindent03_vartabs()
  " simple breakindent test with showbreak set and briopt including sbr
  CheckFeature vartabs
  call s:test_windows('setl briopt=sbr,min:0 sbr=++ vts=4')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "++  qrst",
	\ "++  GHIJ",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr= vts&')
endfunc

func Test_breakindent04()
  " breakindent set with min width 18
  set sbr=<<<
  call s:test_windows('setl sbr=NONE briopt=min:18')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "  qrstuv",
	\ "  IJKLMN",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr=')
  set sbr=
endfunc

func Test_breakindent04_vartabs()
  " breakindent set with min width 18
  CheckFeature vartabs
  call s:test_windows('setl sbr= briopt=min:18 vts=4')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "  qrstuv",
	\ "  IJKLMN",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr= vts&')
endfunc

func Test_breakindent05()
  " breakindent set and shift by 2
  call s:test_windows('setl briopt=shift:2,min:0')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "      qr",
	\ "      EF",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows()
endfunc

func Test_breakindent05_vartabs()
  " breakindent set and shift by 2
  CheckFeature vartabs
  call s:test_windows('setl briopt=shift:2,min:0 vts=4')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "      qr",
	\ "      EF",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set vts&')
endfunc

func Test_breakindent06()
  " breakindent set and shift by -1
  call s:test_windows('setl briopt=shift:-1,min:0')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "   qrstu",
	\ "   HIJKL",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows()
endfunc

func Test_breakindent06_vartabs()
  " breakindent set and shift by -1
  CheckFeature vartabs
  call s:test_windows('setl briopt=shift:-1,min:0 vts=4')
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "    abcd",
	\ "   qrstu",
	\ "   HIJKL",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set vts&')
endfunc

func Test_breakindent07()
  " breakindent set and shift by 1, Number  set sbr=? and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu sbr=? nuw=4 cpo+=n')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2     ab",
	\ "?        m",
	\ "?        x",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr= cpo-=n')
endfunc

func Test_breakindent07_vartabs()
  CheckFeature vartabs
  " breakindent set and shift by 1, Number  set sbr=? and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu sbr=? nuw=4 cpo+=n vts=4')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2     ab",
	\ "?        m",
	\ "?        x",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr= cpo-=n vts&')
endfunc

func Test_breakindent07a()
  " breakindent set and shift by 1, Number  set sbr=? and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu sbr=? nuw=4')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2     ab",
	\ "    ?    m",
	\ "    ?    x",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr=')
endfunc

func Test_breakindent07a_vartabs()
  CheckFeature vartabs
  " breakindent set and shift by 1, Number  set sbr=? and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu sbr=? nuw=4 vts=4')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2     ab",
	\ "    ?    m",
	\ "    ?    x",
	\ ]
  call s:compare_lines(expect, lines)
  " clean up
  call s:close_windows('set sbr= vts&')
endfunc

func Test_breakindent08()
  " breakindent set and shift by 1, Number and list set sbr=# and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu nuw=4 sbr=# list cpo+=n ts=4')
  " make sure, cache is invalidated!
  set ts=8
  redraw!
  set ts=4
  redraw!
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2 ^Iabcd",
	\ "#      opq",
	\ "#      BCD",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr= cpo-=n')
endfunc

func Test_breakindent08_vartabs()
  CheckFeature vartabs
  " breakindent set and shift by 1, Number and list set sbr=# and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu nuw=4 sbr=# list cpo+=n ts=4 vts=4')
  " make sure, cache is invalidated!
  set ts=8
  redraw!
  set ts=4
  redraw!
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2 ^Iabcd",
	\ "#      opq",
	\ "#      BCD",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr= cpo-=n vts&')
endfunc

func Test_breakindent08a()
  " breakindent set and shift by 1, Number and list set sbr=# and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu nuw=4 sbr=# list')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2 ^Iabcd",
	\ "    #  opq",
	\ "    #  BCD",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr=')
endfunc

func Test_breakindent08a_vartabs()
  CheckFeature vartabs
  " breakindent set and shift by 1, Number and list set sbr=# and briopt:sbr
  call s:test_windows('setl briopt=shift:1,sbr,min:0 nu nuw=4 sbr=# list vts=4')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2 ^Iabcd",
	\ "    #  opq",
	\ "    #  BCD",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr= vts&')
endfunc

func Test_breakindent09()
  " breakindent set and shift by 1, Number and list set sbr=#
  call s:test_windows('setl briopt=shift:1,min:0 nu nuw=4 sbr=# list')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2 ^Iabcd",
	\ "       #op",
	\ "       #AB",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr=')
endfunc

func Test_breakindent09_vartabs()
  CheckFeature vartabs
  " breakindent set and shift by 1, Number and list set sbr=#
  call s:test_windows('setl briopt=shift:1,min:0 nu nuw=4 sbr=# list vts=4')
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2 ^Iabcd",
	\ "       #op",
	\ "       #AB",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr= vts&')
endfunc

func Test_breakindent10()
  " breakindent set, Number set sbr=~
  call s:test_windows('setl cpo+=n sbr=~ nu nuw=4 nolist briopt=sbr,min:0')
  " make sure, cache is invalidated!
  set ts=8
  redraw!
  set ts=4
  redraw!
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2     ab",
	\ "~       mn",
	\ "~       yz",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr= cpo-=n')
endfunc

func Test_breakindent10_vartabs()
  CheckFeature vartabs
  " breakindent set, Number set sbr=~
  call s:test_windows('setl cpo+=n sbr=~ nu nuw=4 nolist briopt=sbr,min:0 vts=4')
  " make sure, cache is invalidated!
  set ts=8
  redraw!
  set ts=4
  redraw!
  let lines = s:screen_lines(line('.'),10)
  let expect = [
	\ "  2     ab",
	\ "~       mn",
	\ "~       yz",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set sbr= cpo-=n vts&')
endfunc

func Test_breakindent11()
  " test strdisplaywidth()
  call s:test_windows('setl cpo-=n sbr=>> nu nuw=4 nolist briopt= ts=4')
  let text = getline(2)
  let width = strlen(text[1:]) + indent(2) + strlen(&sbr) * 3 " text wraps 3 times
  call assert_equal(width, strdisplaywidth(text))
  call s:close_windows('set sbr=')
  call assert_equal(4, strdisplaywidth("\t", 4))
endfunc

func Test_breakindent11_vartabs()
  CheckFeature vartabs
  " test strdisplaywidth()
  call s:test_windows('setl cpo-=n sbr=>> nu nuw=4 nolist briopt= ts=4 vts=4')
  let text = getline(2)
  let width = strlen(text[1:]) + 2->indent() + strlen(&sbr) * 3 " text wraps 3 times
  call assert_equal(width, text->strdisplaywidth())
  call s:close_windows('set sbr= vts&')
endfunc

func Test_breakindent12()
  " test breakindent with long indent
  let s:input = "\t\t\t\t\t{"
  call s:test_windows('setl breakindent linebreak briopt=min:10 nu numberwidth=3 ts=4 list listchars=tab:>-')
  let lines = s:screen_lines(2,16)
  let expect = [
	\ " 2 >--->--->--->",
	\ "          ---{  ",
	\ "~               ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set nuw=4 listchars=')
endfunc

func Test_breakindent12_vartabs()
  CheckFeature vartabs
  " test breakindent with long indent
  let s:input = "\t\t\t\t\t{"
  call s:test_windows('setl breakindent linebreak briopt=min:10 nu numberwidth=3 ts=4 list listchars=tab:>- vts=4')
  let lines = s:screen_lines(2,16)
  let expect = [
	\ " 2 >--->--->--->",
	\ "          ---{  ",
	\ "~               ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set nuw=4 listchars= vts&')
endfunc

func Test_breakindent13()
  let s:input = ""
  call s:test_windows('setl breakindent briopt=min:10 ts=8')
  vert resize 20
  call setline(1, ["    a\tb\tc\td\te", "    z   y       x       w       v"])
  1
  norm! fbgj"ayl
  2
  norm! fygj"byl
  call assert_equal('d', @a)
  call assert_equal('w', @b)
  call s:close_windows()
endfunc

func Test_breakindent13_vartabs()
  CheckFeature vartabs
  let s:input = ""
  call s:test_windows('setl breakindent briopt=min:10 ts=8 vts=8')
  vert resize 20
  call setline(1, ["    a\tb\tc\td\te", "    z   y       x       w       v"])
  1
  norm! fbgj"ayl
  2
  norm! fygj"byl
  call assert_equal('d', @a)
  call assert_equal('w', @b)
  call s:close_windows('set vts&')
endfunc

func Test_breakindent14()
  let s:input = ""
  call s:test_windows('setl breakindent briopt= ts=8')
  vert resize 30
  norm! 3a1234567890
  norm! a    abcde
  exec "norm! 0\<C-V>tex"
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "e       ",
	\ "~       ",
	\ "~       ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows()
endfunc

func Test_breakindent14_vartabs()
  CheckFeature vartabs
  let s:input = ""
  call s:test_windows('setl breakindent briopt= ts=8 vts=8')
  vert resize 30
  norm! 3a1234567890
  norm! a    abcde
  exec "norm! 0\<C-V>tex"
  let lines = s:screen_lines(line('.'),8)
  let expect = [
	\ "e       ",
	\ "~       ",
	\ "~       ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set vts&')
endfunc

func Test_breakindent15()
  let s:input = ""
  call s:test_windows('setl breakindent briopt= ts=8 sw=8')
  vert resize 30
  norm! 4a1234567890
  exe "normal! >>\<C-V>3f0x"
  let lines = s:screen_lines(line('.'),20)
  let expect = [
	\ "        1234567890  ",
	\ "~                   ",
	\ "~                   ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows()
endfunc

func Test_breakindent15_vartabs()
  CheckFeature vartabs
  let s:input = ""
  call s:test_windows('setl breakindent briopt= ts=8 sw=8 vts=8')
  vert resize 30
  norm! 4a1234567890
  exe "normal! >>\<C-V>3f0x"
  let lines = s:screen_lines(line('.'),20)
  let expect = [
	\ "        1234567890  ",
	\ "~                   ",
	\ "~                   ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set vts&')
endfunc

func Test_breakindent16()
  " Check that overlong lines are indented correctly.
  let s:input = ""
  call s:test_windows('setl breakindent briopt=min:0 ts=4')
  call setline(1, "\t".repeat("1234567890", 10))
  resize 6
  norm! 1gg$
  redraw!
  let lines = s:screen_lines(1,10)
  let expect = [
	\ "    789012",
	\ "    345678",
	\ "    901234",
	\ ]
  call s:compare_lines(expect, lines)
  let lines = s:screen_lines(4,10)
  let expect = [
	\ "    567890",
	\ "    123456",
	\ "    7890  ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows()
endfunc

func Test_breakindent16_vartabs()
  CheckFeature vartabs
  " Check that overlong lines are indented correctly.
  let s:input = ""
  call s:test_windows('setl breakindent briopt=min:0 ts=4 vts=4')
  call setline(1, "\t".repeat("1234567890", 10))
  resize 6
  norm! 1gg$
  redraw!
  let lines = s:screen_lines(1,10)
  let expect = [
	\ "    789012",
	\ "    345678",
	\ "    901234",
	\ ]
  call s:compare_lines(expect, lines)
  let lines = s:screen_lines(4,10)
  let expect = [
	\ "    567890",
	\ "    123456",
	\ "    7890  ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set vts&')
endfunc

func Test_breakindent17_vartabs()
  CheckFeature vartabs
  let s:input = ""
  call s:test_windows('setl breakindent list listchars=tab:<-> showbreak=+++')
  call setline(1, "\t" . repeat('a', 63))
  vert resize 30
  norm! 1gg$
  redraw!
  let lines = s:screen_lines(1, 30)
  let expect = [
	\ "<-->aaaaaaaaaaaaaaaaaaaaaaaaaa",
	\ "    +++aaaaaaaaaaaaaaaaaaaaaaa",
	\ "    +++aaaaaaaaaaaaaa         ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set breakindent& list& listchars& showbreak&')
endfunc

func Test_breakindent18_vartabs()
  CheckFeature vartabs
  let s:input = ""
  call s:test_windows('setl breakindent list listchars=tab:<->')
  call setline(1, "\t" . repeat('a', 63))
  vert resize 30
  norm! 1gg$
  redraw!
  let lines = s:screen_lines(1, 30)
  let expect = [
	\ "<-->aaaaaaaaaaaaaaaaaaaaaaaaaa",
	\ "    aaaaaaaaaaaaaaaaaaaaaaaaaa",
	\ "    aaaaaaaaaaa               ",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set breakindent& list& listchars&')
endfunc

func Test_breakindent19_sbr_nextpage()
  let s:input = ""
  call s:test_windows('setl breakindent briopt=shift:2,sbr,min:18 sbr=>')
  call setline(1, repeat('a', 200))
  norm! 1gg
  redraw!
  let lines = s:screen_lines(1, 20)
  let expect = [
	\ "aaaaaaaaaaaaaaaaaaaa",
	\ "> aaaaaaaaaaaaaaaaaa",
	\ "> aaaaaaaaaaaaaaaaaa",
	\ ]
  call s:compare_lines(expect, lines)
  " Scroll down one screen line
  setl scrolloff=5
  norm! 5gj
  let lines = s:screen_lines(1, 20)
  let expect = [
	\ "aaaaaaaaaaaaaaaaaaaa",
	\ "> aaaaaaaaaaaaaaaaaa",
	\ "> aaaaaaaaaaaaaaaaaa",
	\ ]
  call s:compare_lines(expect, lines)
  redraw!
  " moving the cursor doesn't change the text offset
  norm! l
  redraw!
  let lines = s:screen_lines(1, 20)
  call s:compare_lines(expect, lines)

  setl breakindent briopt=min:18 sbr=>
  norm! 5gj
  let lines = s:screen_lines(1, 20)
  let expect = [
	\ ">aaaaaaaaaaaaaaaaaaa",
	\ ">aaaaaaaaaaaaaaaaaaa",
	\ ">aaaaaaaaaaaaaaaaaaa",
	\ ]
  call s:compare_lines(expect, lines)
  call s:close_windows('set breakindent& briopt& sbr&')
endfunc

func Test_breakindent20_cpo_n_nextpage()
  let s:input = ""
  call s:test_windows('setl breakindent briopt=min:14 cpo+=n number')
  call setline(1, repeat('a', 200))
  norm! 1gg
  redraw!
  let lines = s:screen_lines(1, 20)
  let expect = [
	\ "  1 aaaaaaaaaaaaaaaa",
	\ "    aaaaaaaaaaaaaaaa",
	\ "    aaaaaaaaaaaaaaaa",
	\ ]
  call s:compare_lines(expect, lines)
  " Scroll down one screen line
  setl scrolloff=5
  norm! 5gj
  redraw!
  let lines = s:screen_lines(1, 20)
  let expect = [
	\ "--1 aaaaaaaaaaaaaaaa",
	\ "    aaaaaaaaaaaaaaaa",
	\ "    aaaaaaaaaaaaaaaa",
	\ ]
  call s:compare_lines(expect, lines)

  setl briopt+=shift:2
  norm! 1gg
  let lines = s:screen_lines(1, 20)
  let expect = [
	\ "  1 aaaaaaaaaaaaaaaa",
	\ "      aaaaaaaaaaaaaa",
	\ "      aaaaaaaaaaaaaa",
	\ ]
  call s:compare_lines(expect, lines)
  " Scroll down one screen line
  norm! 5gj
  let lines = s:screen_lines(1, 20)
  let expect = [
	\ "--1   aaaaaaaaaaaaaa",
	\ "      aaaaaaaaaaaaaa",
	\ "      aaaaaaaaaaaaaa",
	\ ]
  call s:compare_lines(expect, lines)

  call s:close_windows('set breakindent& briopt& cpo& number&')
endfunc

func Test_breakindent20_list()
  call s:test_windows('setl breakindent breakindentopt= linebreak')
  " default:
  call setline(1, ['  1.  Congress shall make no law',
        \ '  2.) Congress shall make no law',
        \ '  3.] Congress shall make no law'])
  norm! 1gg
  redraw!
  let lines = s:screen_lines2(1, 6, 20)
  let expect = [
	\ "  1.  Congress      ",
	\ "shall make no law   ",
	\ "  2.) Congress      ",
	\ "shall make no law   ",
	\ "  3.] Congress      ",
	\ "shall make no law   ",
	\ ]
  call s:compare_lines(expect, lines)
  " set mininum indent
  setl briopt=min:5
  redraw!
  let lines = s:screen_lines2(1, 6, 20)
  let expect = [
	\ "  1.  Congress      ",
	\ "  shall make no law ",
	\ "  2.) Congress      ",
	\ "  shall make no law ",
	\ "  3.] Congress      ",
	\ "  shall make no law ",
	\ ]
  call s:compare_lines(expect, lines)
  " set additional handing indent
  setl briopt+=list:4
  redraw!
  let expect = [
	\ "  1.  Congress      ",
	\ "      shall make no ",
	\ "      law           ",
	\ "  2.) Congress      ",
	\ "      shall make no ",
	\ "      law           ",
	\ "  3.] Congress      ",
	\ "      shall make no ",
	\ "      law           ",
	\ ]
  let lines = s:screen_lines2(1, 9, 20)
  call s:compare_lines(expect, lines)
  " reset linebreak option
  " Note: it indents by one additional
  " space, because of the leading space.
  setl linebreak&vim list listchars=eol:$,space:_
  redraw!
  let expect = [
	\ "__1.__Congress_shall",
	\ "      _make_no_law$ ",
	\ "__2.)_Congress_shall",
	\ "      _make_no_law$ ",
	\ "__3.]_Congress_shall",
	\ "      _make_no_law$ ",
	\ ]
  let lines = s:screen_lines2(1, 6, 20)
  call s:compare_lines(expect, lines)

  call s:close_windows('set breakindent& briopt& linebreak& list& listchars&')
endfunc

" vim: shiftwidth=2 sts=2 expandtab