local helpers = require('test.functional.helpers')
local eq = helpers.eq
local eval = helpers.eval
local clear = helpers.clear
local source = helpers.source
local redir_exec = helpers.redir_exec
local exc_exec = helpers.exc_exec
local funcs = helpers.funcs
local Screen = require('test.functional.ui.screen')
local feed = helpers.feed

describe('capture()', function()
  before_each(clear)

  it('returns the same result with :redir', function()
    eq(redir_exec('messages'), funcs.capture('messages'))
  end)

  it('returns the output of the commands if the argument is List', function()
    eq("foobar", funcs.capture({'echon "foo"', 'echon "bar"'}))
    eq("\nfoo\nbar", funcs.capture({'echo "foo"', 'echo "bar"'}))
  end)

  it('supports the nested redirection', function()
    source([[
    function! g:Foo()
      let a = ''
      redir => a
      silent echon "foo"
      redir END
      return a
    endfunction
    function! g:Bar()
      let a = ''
      redir => a
      call g:Foo()
      redir END
      return a
    endfunction
    ]])
    eq('foo', funcs.capture('call g:Bar()'))

    eq('42', funcs.capture([[echon capture("echon capture('echon 42')")]]))
  end)

  it('returns the transformed string', function()
    eq('^A', funcs.capture('echon "\\<C-a>"'))
  end)

  it('returns the empty string if the argument list is empty', function()
    eq('', funcs.capture({}))
    eq(0, exc_exec('let g:ret = capture(v:_null_list)'))
    eq('', eval('g:ret'))
  end)

  it('returns the errors', function()
    local ret
    ret = exc_exec('call capture(0.0)')
    eq('Vim(call):E806: using Float as a String', ret)
    ret = exc_exec('call capture(v:_null_dict)')
    eq('Vim(call):E731: using Dictionary as a String', ret)
    ret = exc_exec('call capture(function("tr"))')
    eq('Vim(call):E729: using Funcref as a String', ret)
    ret = exc_exec('call capture(["echo 42", 0.0, "echo 44"])')
    eq('Vim(call):E806: using Float as a String', ret)
    ret = exc_exec('call capture(["echo 42", v:_null_dict, "echo 44"])')
    eq('Vim(call):E731: using Dictionary as a String', ret)
    ret = exc_exec('call capture(["echo 42", function("tr"), "echo 44"])')
    eq('Vim(call):E729: using Funcref as a String', ret)
  end)

  it('silences command run inside', function()
    local screen = Screen.new(20, 5)
    screen:attach()
    screen:set_default_attr_ignore({{bold=true, foreground=255}})
    feed(':let g:mes = capture("echon 42")<CR>')
    screen:expect([[
    ^                    |
    ~                   |
    ~                   |
    ~                   |
                        |
    ]])
    eq('42', eval('g:mes'))
  end)
end)