" Test editing line in Ex mode (see :help Q and :help gQ).

source check.vim

" Helper function to test editing line in Q Ex mode
func Ex_Q(cmd)
  " Is there a simpler way to test editing Ex line?
  call feedkeys("Q"
        \    .. "let s:test_ex =<< END\<CR>"
        \    .. a:cmd .. "\<CR>"
        \    .. "END\<CR>"
        \    .. "visual\<CR>", 'tx')
  return s:test_ex[0]
endfunc

" Helper function to test editing line in gQ Ex mode
func Ex_gQ(cmd)
  call feedkeys("gQ" .. a:cmd .. "\<C-b>\"\<CR>", 'tx')
  let ret = @:[1:] " Remove leading quote.
  call feedkeys("visual\<CR>", 'tx')
  return ret
endfunc

" Helper function to test editing line with both Q and gQ Ex mode.
func Ex(cmd)
 return [Ex_Q(a:cmd), Ex_gQ(a:cmd)]
endfunc

" Test editing line in Ex mode (both Q and gQ)
func Test_ex_mode()
  let encoding_save = &encoding
  set sw=2

  for e in ['utf8', 'latin1']
    exe 'set encoding=' . e

    call assert_equal(['bar', 'bar'],             Ex("foo bar\<C-u>bar"), e)
    call assert_equal(["1\<C-u>2", "1\<C-u>2"],   Ex("1\<C-v>\<C-u>2"), e)
    call assert_equal(["1\<C-b>2\<C-e>3", '213'], Ex("1\<C-b>2\<C-e>3"), e)
    call assert_equal(['0123', '2013'],           Ex("01\<Home>2\<End>3"), e)
    call assert_equal(['0123', '0213'],           Ex("01\<Left>2\<Right>3"), e)
    call assert_equal(['01234', '0342'],          Ex("012\<Left>\<Left>\<Insert>3\<Insert>4"), e)
    call assert_equal(["foo bar\<C-w>", 'foo '],  Ex("foo bar\<C-w>"), e)
    call assert_equal(['foo', 'foo'],             Ex("fooba\<Del>\<Del>"), e)
    call assert_equal(["foo\tbar", 'foobar'],     Ex("foo\<Tab>bar"), e)
    call assert_equal(["abbrev\t", 'abbreviate'], Ex("abbrev\<Tab>"), e)
    call assert_equal(['    1', "1\<C-t>\<C-t>"], Ex("1\<C-t>\<C-t>"), e)
    call assert_equal(['  1', "1\<C-t>\<C-t>"],   Ex("1\<C-t>\<C-t>\<C-d>"), e)
    call assert_equal(['  foo', '    foo'],       Ex("    foo\<C-d>"), e)
    call assert_equal(['foo', '    foo0'],        Ex("    foo0\<C-d>"), e)
    call assert_equal(['foo', '    foo^'],        Ex("    foo^\<C-d>"), e)
    call assert_equal(['foo', 'foo'],
          \ Ex("\<BS>\<C-H>\<Del>\<kDel>foo"), e)
    " default wildchar <Tab> interferes with this test
    set wildchar=<c-e>
    call assert_equal(["a\tb", "a\tb"],           Ex("a\t\t\<C-H>b"), e)
    call assert_equal(["\t  mn", "\tm\<C-T>n"],        Ex("\tm\<C-T>n"), e)
    set wildchar&
  endfor

  set sw&
  let &encoding = encoding_save
endfunc

" Test substitute confirmation prompt :%s/pat/str/c in Ex mode
func Test_Ex_substitute()
  CheckRunVimInTerminal
  let buf = RunVimInTerminal('', {'rows': 6})

  call term_sendkeys(buf, ":call setline(1, ['foo foo', 'foo foo', 'foo foo'])\<CR>")
  call term_sendkeys(buf, ":set number\<CR>")
  call term_sendkeys(buf, "gQ")
  call WaitForAssert({-> assert_match(':', term_getline(buf, 6))}, 1000)

  call term_sendkeys(buf, "%s/foo/bar/gc\<CR>")
  call WaitForAssert({-> assert_match('  1 foo foo', term_getline(buf, 5))},
        \ 1000)
  call WaitForAssert({-> assert_match('    ^^^', term_getline(buf, 6))}, 1000)
  call term_sendkeys(buf, "n\<CR>")
  call WaitForAssert({-> assert_match('        ^^^', term_getline(buf, 6))},
        \ 1000)
  call term_sendkeys(buf, "y\<CR>")

  call term_sendkeys(buf, "q\<CR>")
  call WaitForAssert({-> assert_match(':', term_getline(buf, 6))}, 1000)

  " Pressing enter in ex mode should print the current line
  call term_sendkeys(buf, "\<CR>")
  call WaitForAssert({-> assert_match('  3 foo foo',
        \ term_getline(buf, 5))}, 1000)

  call term_sendkeys(buf, ":vi\<CR>")
  call WaitForAssert({-> assert_match('foo bar', term_getline(buf, 1))}, 1000)

  call StopVimInTerminal(buf)
endfunc

" Test for displaying lines from an empty buffer in Ex mode
func Test_Ex_emptybuf()
  new
  call assert_fails('call feedkeys("Q\<CR>", "xt")', 'E749:')
  call setline(1, "abc")
  call assert_fails('call feedkeys("Q\<CR>", "xt")', 'E501:')
  call assert_fails('call feedkeys("Q%d\<CR>", "xt")', 'E749:')
  close!
endfunc

" Test for the :open command
func Test_open_command()
  new
  call setline(1, ['foo foo', 'foo bar', 'foo baz'])
  call feedkeys("Qopen\<CR>j", 'xt')
  call assert_equal('foo bar', getline('.'))
  call feedkeys("Qopen /bar/\<CR>", 'xt')
  call assert_equal(5, col('.'))
  call assert_fails('call feedkeys("Qopen /baz/\<CR>", "xt")', 'E479:')
  close!
endfunc

" Test for :g/pat/visual to run vi commands in Ex mode
" This used to hang Vim before 8.2.0274.
func Test_Ex_global()
  new
  call setline(1, ['', 'foo', 'bar', 'foo', 'bar', 'foo'])
  call feedkeys("Q\<bs>g/bar/visual\<CR>$rxQ$ryQvisual\<CR>j", "xt")
  call assert_equal('bax', getline(3))
  call assert_equal('bay', getline(5))
  bwipe!
endfunc

" In Ex-mode, a backslash escapes a newline
func Test_Ex_escape_enter()
  call feedkeys("gQlet l = \"a\\\<kEnter>b\"\<cr>vi\<cr>", 'xt')
  call assert_equal("a\rb", l)
endfunc

" Test for :append! command in Ex mode
func Test_Ex_append()
  new
  call setline(1, "\t   abc")
  call feedkeys("Qappend!\npqr\nxyz\n.\nvisual\n", 'xt')
  call assert_equal(["\t   abc", "\t   pqr", "\t   xyz"], getline(1, '$'))
  close!
endfunc

" In Ex-mode, backslashes at the end of a command should be halved.
func Test_Ex_echo_backslash()
  " This test works only when the language is English
  if v:lang != "C" && v:lang !~ '^[Ee]n'
    return
  endif
  let bsl = '\\\\'
  let bsl2 = '\\\'
  call assert_fails('call feedkeys("Qecho " .. bsl .. "\nvisual\n", "xt")',
        \ "E15: Invalid expression: \\\\")
  call assert_fails('call feedkeys("Qecho " .. bsl2 .. "\nm\nvisual\n", "xt")',
        \ "E15: Invalid expression: \\\nm")
endfunc

func Test_ex_mode_errors()
  " Not allowed to enter ex mode when text is locked
  au InsertCharPre <buffer> normal! gQ<CR>
  let caught_e523 = 0
  try
    call feedkeys("ix\<esc>", 'xt')
  catch /^Vim\%((\a\+)\)\=:E523/ " catch E523
    let caught_e523 = 1
  endtry
  call assert_equal(1, caught_e523)
  au! InsertCharPre
endfunc

" vim: shiftwidth=2 sts=2 expandtab