Execute (setup test environment):
  set hidden

Execute (helper functions):
  function! AssertSyntax(...)
    for i in range(1, a:0)
      let line = split(get(a:000, i-1), '\zs')
      for j in range(1, len(line))
        if get(line, j-1) == '•'
          AssertEqual vader#helper#syntax_at(i, j), 'SecretHidden', 'Expected SecretHidden, got ' . vader#helper#syntax_at(i, j) . ' at line ' . i . ', column ' . j
        elseif get(line, j-1) == ' '
          AssertEqual vader#helper#syntax_at(i, j), '', 'Expected None, got ' . vader#helper#syntax_at(i, j) . ' at line ' . i . ', column ' . j
        elseif get(line, j-1) == '-'
          AssertEqual vader#helper#syntax_at(i, j), 'SecretVisible', 'Expected SecretVisible, got ' . vader#helper#syntax_at(i, j) . ' at line ' . i . ', column ' . j
        endif
      endfor
    endfor
  endfunction
  command! -nargs=* AssertSyntax call AssertSyntax(<args>)

Before:
  source plugin/secret.vim
  source autoload/secret.vim

After:
  Secret!
  unlet! g:secret_cchar
  unlet! g:secret_visibility
  unlet! g:secret_visibility_normal
  unlet! g:secret_visibility_insert
  unlet! g:secret_timeout_normal
  unlet! g:secret_timeout_insert

Given:
  Lorem ipsum
  dolor sit amet

Execute (enable/disable):
  AssertSyntax '           ', '              '
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  Assert exists('w:secret_state')
  Assert exists('#secret-' . win_getid() . '-' . bufnr())
  Secret!
  AssertSyntax '           ', '              '
  Assert !exists('w:secret_state')
  Assert !exists('#secret-' . win_getid() . '-' . bufnr())

Execute (word visibility):
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  normal jw
  AssertSyntax '••••• •••••', '••••• --- ••••'

Execute (line visibility):
  let g:secret_visibility = 'line'
  Secret
  AssertSyntax '-----------', '••••• ••• ••••'
  normal j
  AssertSyntax '••••• •••••', '--------------'

Execute (char visibility):
  let g:secret_visibility = 'char'
  Secret
  AssertSyntax '-•••• •••••', '••••• ••• ••••'
  normal wll
  AssertSyntax '••••• ••-••', '••••• ••• ••••'

Execute (none visibility):
  let g:secret_visibility = 'none'
  Secret
  AssertSyntax '••••• •••••', '••••• ••• ••••'
  normal jww
  AssertSyntax '••••• •••••', '••••• ••• ••••'

Execute (line, insert):
  let g:secret_visibility_insert = 'line'
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  doautocmd InsertEnter
  AssertSyntax '-----------', '••••• ••• ••••'
  doautocmd InsertLeave
  AssertSyntax '----- •••••', '••••• ••• ••••'

Execute (word, insert):
  let g:secret_visibility_insert = 'word'
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  doautocmd InsertEnter
  AssertSyntax '----- •••••', '••••• ••• ••••'
  doautocmd InsertLeave
  AssertSyntax '----- •••••', '••••• ••• ••••'

Execute (char, insert):
  let g:secret_visibility_insert = 'char'
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  normal l
  doautocmd InsertEnter
  AssertSyntax '-•••• •••••', '••••• ••• ••••'
  doautocmd InsertLeave
  AssertSyntax '----- •••••', '••••• ••• ••••'

Execute (none, insert):
  let g:secret_visibility_insert = 'none'
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  doautocmd InsertEnter
  AssertSyntax '••••• •••••', '••••• ••• ••••'
  doautocmd InsertLeave
  AssertSyntax '----- •••••', '••••• ••• ••••'

Execute (timeout, normal):
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  doautocmd CursorHold
  AssertSyntax '••••• •••••', '••••• ••• ••••'
  Secret!
  let g:secret_timeout_normal = 0
  Secret
  doautocmd CursorHold
  AssertSyntax '----- •••••', '••••• ••• ••••'

Execute (timeout, insert):
  " Not testable?

Execute (splits 1):
  vsp
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  let w = win_getid()
  let b = bufnr()
  wincmd l
  Assert !exists('w:secret_state')
  Assert exists('#secret-' . w . '-' . b)
  AssertSyntax '           ', '              '
  wincmd h " Switch back to secret buffer so it is undone

Execute (splits 2):
  Secret
  vsp
  Assert !exists('w:secret_state')
  AssertSyntax '           ', '              '
  wincmd l
  doautocmd CursorMoved
  AssertSyntax '----- •••••', '••••• ••• ••••'

Execute (leave window):
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  doautocmd WinLeave
  AssertSyntax '••••• •••••', '••••• ••• ••••'

Execute (close buffer):
  enew
  let b = bufnr()
  0put ='Lorem ipsum'
  Secret
  AssertSyntax '----- •••••'
  bdelete!
  Assert !exists('w:secret_state')
  Assert !exists('#secret-' . win_getid() . '-' . b)

Execute (switching buffers in one window):
  let a = bufnr()
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'

  enew
  let b = bufnr()
  Secret
  0put ='Lorem ipsum'
  AssertSyntax '----- •••••'

  enew
  let c = bufnr()
  0put ='Lorem ibsum'
  Secret
  normal w
  AssertSyntax '••••• -----'

  Assert exists('#secret-' . win_getid() . '-' . a)
  Assert exists('#secret-' . win_getid() . '-' . b)
  Assert exists('#secret-' . win_getid() . '-' . c)
  Assert has_key(w:secret_state, a)
  Assert has_key(w:secret_state, b)
  Assert has_key(w:secret_state, c)

  execute 'b' a
  AssertSyntax '----- •••••', '••••• ••• ••••'
  execute 'b' b
  AssertSyntax '----- •••••'
  execute 'b' c
  AssertSyntax '----- •••••'

  execute 'b' a
  execute 'bdelete!' c

  Assert exists('#secret-' . win_getid() . '-' . a)
  Assert exists('#secret-' . win_getid() . '-' . b)
  Assert !exists('#secret-' . win_getid() . '-' . c)
  Assert has_key(w:secret_state, a)
  Assert has_key(w:secret_state, b)
  Assert !has_key(w:secret_state, c)

  execute 'bdelete!' b

  Assert exists('#secret-' . win_getid() . '-' . a)
  Assert !exists('#secret-' . win_getid() . '-' . b)
  Assert !exists('#secret-' . win_getid() . '-' . c)
  Assert has_key(w:secret_state, a)
  Assert !has_key(w:secret_state, b)
  Assert !has_key(w:secret_state, c)

  b #
  execute 'bdelete!' a
  Assert !exists('#secret-' . win_getid() . '-' . a)
  Assert !exists('#secret-' . win_getid() . '-' . b)
  Assert !exists('#secret-' . win_getid() . '-' . c)
  Assert !exists('w:secret_state')

Execute (quickhide mapping):
  let g:secret_quickhide = '<C-e>'
  Secret
  AssertSyntax '----- •••••', '••••• ••• ••••'
  normal 
  AssertSyntax '••••• •••••', '••••• ••• ••••'
  normal w
  doautocmd CursorMoved
  AssertSyntax '••••• -----', '••••• ••• ••••'

Execute (quickhide mapping, moving around):
  let g:secret_quickhide = 'q'
  vsp
  Secret
  normal q
  AssertSyntax '••••• •••••', '••••• ••• ••••'
  enew
  0put ='Lorem ipsum'
  AssertEqual maparg('q'), ''
  b #
  AssertEqual maparg('q'), ':syntax clear SecretVisible<CR>'
  wincmd l
  AssertEqual maparg('q'), ''
  wincmd h
  doautocmd CursorMoved
  AssertSyntax '----- •••••', '••••• ••• ••••'
  normal q
  AssertSyntax '••••• •••••', '••••• ••• ••••'
  Secret!
  AssertEqual maparg('q'), ''

Execute (toggle mapping):
  nmap s <Plug>SecretToggle
  AssertSyntax '           ', '              '
  normal s
  AssertSyntax '----- •••••', '••••• ••• ••••'