" Test for various indent options

func Test_preserveindent()
  new
  " Test for autoindent copying indent from the previous line
  setlocal autoindent
  call setline(1, [repeat(' ', 16) .. 'line1'])
  call feedkeys("A\nline2", 'xt')
  call assert_equal("\t\tline2", getline(2))
  setlocal autoindent&

  " Test for using CTRL-T with and without 'preserveindent'
  set shiftwidth=4
  call cursor(1, 1)
  call setline(1, "    \t    ")
  call feedkeys("Al\<C-T>", 'xt')
  call assert_equal("\t\tl", getline(1))
  set preserveindent
  call setline(1, "    \t    ")
  call feedkeys("Al\<C-T>", 'xt')
  call assert_equal("    \t    \tl", getline(1))
  set pi& sw&

  " Test for using CTRL-T with 'expandtab' and 'preserveindent'
  call cursor(1, 1)
  call setline(1, "\t    \t")
  set shiftwidth=4 expandtab preserveindent
  call feedkeys("Al\<C-T>", 'xt')
  call assert_equal("\t    \t    l", getline(1))
  set sw& et& pi&

  close!
endfunc

" Test for indent()
func Test_indent_func()
  call assert_equal(-1, indent(-1))
  new
  call setline(1, "\tabc")
  call assert_equal(8, indent(1))
  call setline(1, "    abc")
  call assert_equal(4, indent(1))
  call setline(1, "    \t    abc")
  call assert_equal(12, indent(1))
  close!
endfunc

" Test for reindenting a line using the '=' operator
func Test_reindent()
  new
  call setline(1, 'abc')
  set nomodifiable
  call assert_fails('normal ==', 'E21:')
  set modifiable

  call setline(1, ['foo', 'bar'])
  call feedkeys('ggVG=', 'xt')
  call assert_equal(['foo', 'bar'], getline(1, 2))
  close!
endfunc

" Test indent operator creating one undo entry
func Test_indent_operator_undo()
  enew
  call setline(1, range(12)->map('"\t" .. v:val'))
  func FoldExpr()
    let g:foldcount += 1
    return '='
  endfunc
  set foldmethod=expr foldexpr=FoldExpr()
  let g:foldcount = 0
  redraw
  call assert_equal(12, g:foldcount)
  normal gg=G
  call assert_equal(24, g:foldcount)
  undo
  call assert_equal(38, g:foldcount)

  bwipe!
  set foldmethod& foldexpr=
  delfunc FoldExpr
  unlet g:foldcount
endfunc

" Test for shifting a line with a preprocessor directive ('#')
func Test_preproc_indent()
  new
  set sw=4
  call setline(1, '#define FOO 1')
  normal >>
  call assert_equal('    #define FOO 1', getline(1))

  " with 'smartindent'
  call setline(1, '#define FOO 1')
  set smartindent
  normal >>
  call assert_equal('#define FOO 1', getline(1))
  set smartindent&

  " with 'cindent'
  set cindent
  normal >>
  call assert_equal('#define FOO 1', getline(1))
  set cindent&

  close!
endfunc

" Test for 'copyindent'
func Test_copyindent()
  new
  set shiftwidth=4 autoindent expandtab copyindent
  call setline(1, "    \t    abc")
  call feedkeys("ol", 'xt')
  call assert_equal("    \t    l", getline(2))
  set noexpandtab
  call setline(1, "    \t    abc")
  call feedkeys("ol", 'xt')
  call assert_equal("    \t    l", getline(2))
  set sw& ai& et& ci&
  close!
endfunc

" vim: shiftwidth=2 sts=2 expandtab