test(old): add more missing test files and run more tests alone

Copy four files from Vim v8.2.1432.
Try to match Vim's test_alot.vim.
This marks Vim patch 8.2.0164 as ported:

vim-patch:8.2.0164: test_alot takes too long

Problem:    Test_alot takes too long.
Solution:   Run several tests individually.
842931cd7a

test/functional/legacy/delete_spec.lua

@@ -1,7 +1,6 @@
 local helpers = require('test.functional.helpers')(after_each)
 local clear, source = helpers.clear, helpers.source
 local eq, eval, command = helpers.eq, helpers.eval, helpers.command
-local exc_exec = helpers.exc_exec
 
 describe('Test for delete()', function()
   before_each(clear)
@@ -9,42 +8,6 @@ describe('Test for delete()', function()
     os.remove('Xfile')
   end)
 
-  it('file delete', function()
-    command('split Xfile')
-    command("call setline(1, ['a', 'b'])")
-    command('wq')
-    eq(eval("['a', 'b']"), eval("readfile('Xfile')"))
-    eq(0, eval("delete('Xfile')"))
-    eq(-1, eval("delete('Xfile')"))
-  end)
-
-  it('directory delete', function()
-    command("call mkdir('Xdir1')")
-    eq(1, eval("isdirectory('Xdir1')"))
-    eq(0, eval("delete('Xdir1', 'd')"))
-    eq(0, eval("isdirectory('Xdir1')"))
-    eq(-1, eval("delete('Xdir1', 'd')"))
-  end)
-  it('recursive delete', function()
-    command("call mkdir('Xdir1')")
-    command("call mkdir('Xdir1/subdir')")
-    command("call mkdir('Xdir1/empty')")
-    command('split Xdir1/Xfile')
-    command("call setline(1, ['a', 'b'])")
-    command('w')
-    command('w Xdir1/subdir/Xfile')
-    command('close')
-
-    eq(1, eval("isdirectory('Xdir1')"))
-    eq(eval("['a', 'b']"), eval("readfile('Xdir1/Xfile')"))
-    eq(1, eval("isdirectory('Xdir1/subdir')"))
-    eq(eval("['a', 'b']"), eval("readfile('Xdir1/subdir/Xfile')"))
-    eq(1, eval("'Xdir1/empty'->isdirectory()"))
-    eq(0, eval("delete('Xdir1', 'rf')"))
-    eq(0, eval("isdirectory('Xdir1')"))
-    eq(-1, eval("delete('Xdir1', 'd')"))
-  end)
-
   it('symlink delete', function()
     source([[
       split Xfile
@@ -115,10 +78,4 @@ describe('Test for delete()', function()
     eq(0, eval("delete('Xdir4/Xfile')"))
     eq(0, eval("delete('Xdir4', 'd')"))
   end)
-
-  it('gives correct emsgs', function()
-    eq('Vim(call):E474: Invalid argument', exc_exec("call delete('')"))
-    eq('Vim(call):E15: Invalid expression: 0',
-       exc_exec("call delete('foo', 0)"))
-  end)
 end)

test/functional/legacy/file_perm_spec.lua

@@ -1,43 +0,0 @@
--- Test getting and setting file permissions.
-require('os')
-
-local helpers = require('test.functional.helpers')(after_each)
-local clear, call, eq = helpers.clear, helpers.call, helpers.eq
-local neq, exc_exec, eval = helpers.neq, helpers.exc_exec, helpers.eval
-
-describe('Test getting and setting file permissions', function()
-  local tempfile = helpers.tmpname()
-
-  before_each(function()
-    os.remove(tempfile)
-    clear()
-  end)
-
-  it('file permissions', function()
-    -- eval() is used to test VimL method syntax for setfperm() and getfperm()
-    eq('', call('getfperm', tempfile))
-    eq(0, eval("'" .. tempfile .. "'->setfperm('r--------')"))
-
-    call('writefile', {'one'}, tempfile)
-    eq(9, eval("len('" .. tempfile .. "'->getfperm())"))
-
-    eq(1, call('setfperm', tempfile, 'rwx------'))
-    if helpers.is_os('win') then
-      eq('rw-rw-rw-', call('getfperm', tempfile))
-    else
-      eq('rwx------', call('getfperm', tempfile))
-    end
-
-    eq(1, call('setfperm', tempfile, 'r--r--r--'))
-    eq('r--r--r--', call('getfperm', tempfile))
-
-    local err = exc_exec(('call setfperm("%s", "---")'):format(tempfile))
-    neq(err:find('E475:'), nil)
-
-    eq(1, call('setfperm', tempfile, 'rwx------'))
-  end)
-
-  after_each(function()
-    os.remove(tempfile)
-  end)
-end)

test/functional/legacy/searchpos_spec.lua

@@ -1,35 +0,0 @@
-local helpers = require('test.functional.helpers')(after_each)
-local call = helpers.call
-local clear = helpers.clear
-local command = helpers.command
-local eq = helpers.eq
-local eval = helpers.eval
-local insert = helpers.insert
-
-describe('searchpos', function()
-  before_each(clear)
-
-  it('is working', function()
-    insert([[
-      1a3
-      123xyz]])
-
-    call('cursor', 1, 1)
-    eq({1, 1, 2}, eval([[searchpos('\%(\([a-z]\)\|\_.\)\{-}xyz', 'pcW')]]))
-    call('cursor', 1, 2)
-    eq({2, 1, 1}, eval([['\%(\([a-z]\)\|\_.\)\{-}xyz'->searchpos('pcW')]]))
-
-    command('set cpo-=c')
-    call('cursor', 1, 2)
-    eq({1, 2, 2}, eval([[searchpos('\%(\([a-z]\)\|\_.\)\{-}xyz', 'pcW')]]))
-    call('cursor', 1, 3)
-    eq({1, 3, 1}, eval([[searchpos('\%(\([a-z]\)\|\_.\)\{-}xyz', 'pcW')]]))
-
-    -- Now with \zs, first match is in column 0, "a" is matched.
-    call('cursor', 1, 3)
-    eq({2, 4, 2}, eval([[searchpos('\%(\([a-z]\)\|\_.\)\{-}\zsxyz', 'pcW')]]))
-    -- With z flag start at cursor column, don't see the "a".
-    call('cursor', 1, 3)
-    eq({2, 4, 1}, eval([[searchpos('\%(\([a-z]\)\|\_.\)\{-}\zsxyz', 'pcWz')]]))
-  end)
-end)

test/functional/legacy/set_spec.lua

@@ -1,30 +0,0 @@
--- Tests for :set
-
-local helpers = require('test.functional.helpers')(after_each)
-local clear, command, eval, eq =
-  helpers.clear, helpers.command, helpers.eval, helpers.eq
-
-describe(':set', function()
-  before_each(clear)
-
-  it('handles backslash properly', function()
-    command('set iskeyword=a,b,c')
-    command('set iskeyword+=d')
-    eq('a,b,c,d', eval('&iskeyword'))
-
-    command([[set iskeyword+=\\,e]])
-    eq([[a,b,c,d,\,e]], eval('&iskeyword'))
-
-    command('set iskeyword-=e')
-    eq([[a,b,c,d,\]], eval('&iskeyword'))
-
-    command([[set iskeyword-=\]])
-    eq('a,b,c,d', eval('&iskeyword'))
-  end)
-
-  it('recognizes a trailing comma with +=', function()
-    command('set wildignore=*.png,')
-    command('set wildignore+=*.jpg')
-    eq('*.png,*.jpg', eval('&wildignore'))
-  end)
-end)