refactor!: optwin.lua #36505

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Co-authored-by: Justin M. Keyes <justinkz@gmail.com>

test/functional/plugin/optwin_spec.lua

@@ -0,0 +1,101 @@
+local t = require('test.testutil')
+local n = require('test.functional.testnvim')()
+
+local command = n.command
+local api = n.api
+local fn = n.fn
+local eval = n.eval
+local feed = n.feed
+local clear = n.clear
+local eq = t.eq
+local neq = t.neq
+
+describe('optwin.lua', function()
+  before_each(clear)
+
+  it(':options shows options UI', function()
+    command 'options'
+
+    command '/^ 1'
+    local lnum = fn.line('.')
+    feed('<CR>')
+    neq(lnum, fn.line('.'))
+
+    n.add_builddir_to_rtp()
+    command '/^startofline'
+    local win = api.nvim_get_current_win()
+    feed('<CR>')
+    neq(win, api.nvim_get_current_win())
+    eq('help', eval('&filetype'))
+    api.nvim_win_close(0, true)
+    eq(win, api.nvim_get_current_win())
+
+    command '/^ \t'
+    local opt_value = eval('&startofline')
+    local line = api.nvim_get_current_line()
+    feed('<CR>')
+    neq(opt_value, eval('&startofline'))
+    neq(line, api.nvim_get_current_line())
+
+    command('set startofline!')
+    neq(line, api.nvim_get_current_line())
+    feed('<space>')
+    eq(line, api.nvim_get_current_line())
+
+    command 'wincmd j'
+    command 'wincmd k'
+    command '/^number'
+    command '/^ \t'
+    line = api.nvim_get_current_line()
+    feed('<CR>')
+    neq(line, api.nvim_get_current_line())
+    command 'wincmd o'
+    feed('<CR>')
+    neq(line, api.nvim_get_current_line())
+  end)
+
+  it(':options shows all options', function()
+    local ignore = {
+      -- These options are removed/unused/deprecated
+      'compatible',
+      'paste',
+      'highlight',
+      'terse',
+      'aleph',
+      'encoding',
+      'termencoding',
+      'maxcombine',
+      'secure',
+      'prompt',
+      'edcompatible',
+      'guioptions',
+      'guitablabel',
+      'guitabtooltip',
+      'insertmode',
+      'mouseshape',
+      'imcmdline',
+      'imdisable',
+      'pastetoggle',
+      'langnoremap',
+      'opendevice',
+      'ttyfast',
+      'remap',
+      'hkmap',
+      'hkmapp',
+
+      -- These options are read-only
+      'channel',
+    }
+
+    command 'options'
+
+    local options = ignore
+    for _, line in ipairs(api.nvim_buf_get_lines(0, 0, -1, true)) do
+      if line:match('^[a-z]') then
+        table.insert(options, line:match('^[a-z]+'))
+      end
+    end
+
+    eq(fn.sort(vim.tbl_keys(api.nvim_get_all_options_info())), fn.sort(options))
+  end)
+end)