feat(test): use nvim_exec in helpers.source() #16064

helpers.source() was a hack to work around the lack of anonymous
:source. Its "create tempfile" behavior is not a required part of most
tests that use it.

Some tests still need the old "create tempfile" behavior either because
they test SID behavior, or because of missing nvim_exec features: #16071

13 files changed, 93 insertions, 70 deletions

diff --git a/README.md b/README.md
index 4ec5cf2be3..b5a469b32d 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
-[![Neovim](https://raw.githubusercontent.com/neovim/neovim.github.io/master/logos/neovim-logo-300x87.png)](https://neovim.io)
+<h1 align="center">
+  <img src="https://raw.githubusercontent.com/neovim/neovim.github.io/master/logos/neovim-logo-300x87.png" alt="Neovim">
+</h1>
 
 [Documentation](https://neovim.io/doc/general/) |
 [Chat](https://app.element.io/#/room/#neovim:matrix.org) |
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 8323ec3e9d..c0a7b73438 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -3670,8 +3670,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 		0: never
 		1: only if there are at least two windows
 		2: always
-		3: have a global statusline at the bottom instead of one for
-		   each window
+		3: always and ONLY the last window
 	The screen looks nicer with a status line if you have several
 	windows, but it takes another screen line. |status-line|
 
diff --git a/runtime/doc/repeat.txt b/runtime/doc/repeat.txt
index 994f97bba0..508565dea4 100644
--- a/runtime/doc/repeat.txt
+++ b/runtime/doc/repeat.txt
@@ -182,8 +182,7 @@ For writing a Vim script, see chapter 41 of the user manual |usr_41.txt|.
 
 					*:so* *:source* *load-vim-script*
 :[range]so[urce] [file]	Runs |Ex| commands or Lua code (".lua" files) from
-			[file], or from the current buffer if no [file] is
-			given.
+			[file], or current buffer if no [file].
 			Triggers the |SourcePre| autocommand.
 							*:source!*
 :[range]so[urce]! {file}
diff --git a/runtime/doc/vim_diff.txt b/runtime/doc/vim_diff.txt
index 9ca5faf112..59f085977b 100644
--- a/runtime/doc/vim_diff.txt
+++ b/runtime/doc/vim_diff.txt
@@ -180,6 +180,7 @@ Commands:
   |:Man| is available by default, with many improvements such as completion
   |:sign-define| accepts a `numhl` argument, to highlight the line number
   |:match| can be invoked before highlight group is defined
+  |:source| works with Lua and anonymous (no file) scripts
 
 Events:
   |RecordingEnter|
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index fbbc543893..6c72c2866e 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -9217,6 +9217,8 @@ dictitem_T *find_var_in_ht(hashtab_T *const ht, int htname, const char *const va
 
 /// Finds the dict (g:, l:, s:, …) and hashtable used for a variable.
 ///
+/// Assigns SID if s: scope is accessed from Lua or anonymous Vimscript. #15994
+///
 /// @param[in]  name  Variable name, possibly with scope prefix.
 /// @param[in]  name_len  Variable name length.
 /// @param[out]  varname  Will be set to the start of the name without scope
@@ -9304,6 +9306,7 @@ static hashtab_T *find_var_ht_dict(const char *name, const size_t name_len, cons
       }
     }
     if (current_sctx.sc_sid == SID_STR || current_sctx.sc_sid == SID_LUA) {
+      // Create SID if s: scope is accessed from Lua or anon Vimscript. #15994
       new_script_item(NULL, &current_sctx.sc_sid);
     }
     *d = &SCRIPT_SV(current_sctx.sc_sid)->sv_dict;
diff --git a/test/functional/api/command_spec.lua b/test/functional/api/command_spec.lua
index b80004f67c..94176fc2ce 100644
--- a/test/functional/api/command_spec.lua
+++ b/test/functional/api/command_spec.lua
@@ -65,6 +65,7 @@ describe('nvim_get_commands', function()
     local cmd3 = { addr=NIL,         bang=false, bar=true,  complete=NIL,      complete_arg=NIL,         count=NIL,  definition='call \128\253R3_ohyeah()',      name='Cmd3',    nargs='0', range=NIL,  register=false, keepscript=false, script_id=3, }
     local cmd4 = { addr=NIL,         bang=false, bar=false, complete=NIL,      complete_arg=NIL,         count=NIL,  definition='call \128\253R4_just_great()',  name='Cmd4',    nargs='0', range=NIL,  register=true,  keepscript=false, script_id=4, }
     source([[
+      let s:foo = 1
       command -complete=custom,ListUsers -nargs=+ Finger !finger <args>
     ]])
     eq({Finger=cmd1}, meths.get_commands({builtin=false}))
@@ -72,12 +73,18 @@ describe('nvim_get_commands', function()
     eq({Finger=cmd1, TestCmd=cmd0}, meths.get_commands({builtin=false}))
 
     source([[
+      function! s:foo() abort
+      endfunction
       command -bang -nargs=* Cmd2 call <SID>foo(<q-args>)
     ]])
     source([[
+      function! s:ohyeah() abort
+      endfunction
       command -bar -nargs=0 Cmd3 call <SID>ohyeah()
     ]])
     source([[
+      function! s:just_great() abort
+      endfunction
       command -register Cmd4 call <SID>just_great()
     ]])
     -- TODO(justinmk): Order is stable but undefined. Sort before return?
diff --git a/test/functional/ex_cmds/cmd_map_spec.lua b/test/functional/ex_cmds/cmd_map_spec.lua
index 0b2190bbcf..64cf53dfa9 100644
--- a/test/functional/ex_cmds/cmd_map_spec.lua
+++ b/test/functional/ex_cmds/cmd_map_spec.lua
@@ -1,21 +1,23 @@
 local helpers = require('test.functional.helpers')(after_each)
 local clear = helpers.clear
-local feed_command = helpers.feed_command
 local feed = helpers.feed
 local eq = helpers.eq
 local expect = helpers.expect
 local eval = helpers.eval
 local funcs = helpers.funcs
 local insert = helpers.insert
+local write_file = helpers.write_file
 local exc_exec = helpers.exc_exec
-local source = helpers.source
+local command = helpers.command
 local Screen = require('test.functional.ui.screen')
 
 describe('mappings with <Cmd>', function()
   local screen
+  local tmpfile = 'X_ex_cmds_cmd_map'
+
   local function cmdmap(lhs, rhs)
-    feed_command('noremap '..lhs..' <Cmd>'..rhs..'<cr>')
-    feed_command('noremap! '..lhs..' <Cmd>'..rhs..'<cr>')
+    command('noremap '..lhs..' <Cmd>'..rhs..'<cr>')
+    command('noremap! '..lhs..' <Cmd>'..rhs..'<cr>')
   end
 
   before_each(function()
@@ -39,7 +41,7 @@ describe('mappings with <Cmd>', function()
     cmdmap('<F4>', 'normal! ww')
     cmdmap('<F5>', 'normal! "ay')
     cmdmap('<F6>', 'throw "very error"')
-    feed_command([[
+    command([[
         function! TextObj()
             if mode() !=# "v"
                 normal! v
@@ -55,11 +57,15 @@ describe('mappings with <Cmd>', function()
     feed('gg')
     cmdmap('<F8>', 'startinsert')
     cmdmap('<F9>', 'stopinsert')
-    feed_command("abbr foo <Cmd>let g:y = 17<cr>bar")
+    command("abbr foo <Cmd>let g:y = 17<cr>bar")
+  end)
+
+  after_each(function()
+    os.remove(tmpfile)
   end)
 
   it('can be displayed', function()
-    feed_command('map <F3>')
+    command('map <F3>')
     screen:expect([[
       ^some short lines                                                 |
       of test text                                                     |
@@ -73,8 +79,8 @@ describe('mappings with <Cmd>', function()
   end)
 
   it('handles invalid mappings', function()
-    feed_command('let x = 0')
-    feed_command('noremap <F3> <Cmd><Cmd>let x = 1<cr>')
+    command('let x = 0')
+    command('noremap <F3> <Cmd><Cmd>let x = 1<cr>')
     feed('<F3>')
     screen:expect([[
       ^some short lines                                                 |
@@ -87,7 +93,7 @@ describe('mappings with <Cmd>', function()
       {2:E5521: <Cmd> mapping must end with <CR> before second <Cmd>}      |
     ]])
 
-    feed_command('noremap <F3> <Cmd><F3>let x = 2<cr>')
+    command('noremap <F3> <Cmd><F3>let x = 2<cr>')
     feed('<F3>')
     screen:expect([[
       ^some short lines                                                 |
@@ -100,7 +106,7 @@ describe('mappings with <Cmd>', function()
       {2:E5522: <Cmd> mapping must not include <F3> key}                   |
     ]])
 
-    feed_command('noremap <F3> <Cmd>let x = 3')
+    command('noremap <F3> <Cmd>let x = 3')
     feed('<F3>')
     screen:expect([[
       ^some short lines                                                 |
@@ -137,7 +143,7 @@ describe('mappings with <Cmd>', function()
     eq('n', eval('mode(1)'))
 
     -- select mode mapping
-    feed_command('snoremap <F3> <Cmd>let m = mode(1)<cr>')
+    command('snoremap <F3> <Cmd>let m = mode(1)<cr>')
     feed('gh<F3>')
     eq('s', eval('m'))
     -- didn't leave select mode
@@ -184,8 +190,8 @@ describe('mappings with <Cmd>', function()
     eq('n', eval('mode(1)'))
 
     -- terminal mode
-    feed_command('tnoremap <F3> <Cmd>let m = mode(1)<cr>')
-    feed_command('split | terminal')
+    command('tnoremap <F3> <Cmd>let m = mode(1)<cr>')
+    command('split | terminal')
     feed('i')
     eq('t', eval('mode(1)'))
     feed('<F3>')
@@ -264,11 +270,11 @@ describe('mappings with <Cmd>', function()
   end)
 
   it('works in :normal command', function()
-    feed_command('noremap ,x <Cmd>call append(1, "xx")\\| call append(1, "aa")<cr>')
-    feed_command('noremap ,f <Cmd>nosuchcommand<cr>')
-    feed_command('noremap ,e <Cmd>throw "very error"\\| call append(1, "yy")<cr>')
-    feed_command('noremap ,m <Cmd>echoerr "The message."\\| call append(1, "zz")<cr>')
-    feed_command('noremap ,w <Cmd>for i in range(5)\\|if i==1\\|echoerr "Err"\\|endif\\|call append(1, i)\\|endfor<cr>')
+    command('noremap ,x <Cmd>call append(1, "xx")\\| call append(1, "aa")<cr>')
+    command('noremap ,f <Cmd>nosuchcommand<cr>')
+    command('noremap ,e <Cmd>throw "very error"\\| call append(1, "yy")<cr>')
+    command('noremap ,m <Cmd>echoerr "The message."\\| call append(1, "zz")<cr>')
+    command('noremap ,w <Cmd>for i in range(5)\\|if i==1\\|echoerr "Err"\\|endif\\|call append(1, i)\\|endfor<cr>')
 
     feed(":normal ,x<cr>")
     screen:expect([[
@@ -297,7 +303,7 @@ describe('mappings with <Cmd>', function()
       :normal ,x                                                       |
     ]])
 
-    feed_command(':%d')
+    command(':%d')
     eq('Vim(echoerr):Err', exc_exec("normal ,w"))
     screen:expect([[
       ^                                                                 |
@@ -310,8 +316,8 @@ describe('mappings with <Cmd>', function()
       --No lines in buffer--                                           |
     ]])
 
-    feed_command(':%d')
-    feed_command(':normal ,w')
+    command(':%d')
+    feed(':normal ,w<cr>')
     screen:expect([[
       ^                                                                 |
       4                                                                |
@@ -401,8 +407,8 @@ describe('mappings with <Cmd>', function()
   end)
 
   it('works in select mode', function()
-    feed_command('snoremap <F1> <cmd>throw "very error"<cr>')
-    feed_command('snoremap <F2> <cmd>normal! <c-g>"by<cr>')
+    command('snoremap <F1> <cmd>throw "very error"<cr>')
+    command('snoremap <F2> <cmd>normal! <c-g>"by<cr>')
     -- can extend select mode
     feed('gh<F4>')
     screen:expect([[
@@ -830,12 +836,14 @@ describe('mappings with <Cmd>', function()
   end)
 
   it("works with <SID> mappings", function()
-    source([[
+    command('new!')
+    write_file(tmpfile, [[
       map <f2> <Cmd>call <SID>do_it()<Cr>
       function! s:do_it()
         let g:x = 10
       endfunction
     ]])
+    command('source '..tmpfile)
     feed('<f2>')
     eq('', eval('v:errmsg'))
     eq(10, eval('g:x'))
diff --git a/test/functional/ex_cmds/echo_spec.lua b/test/functional/ex_cmds/echo_spec.lua
index d320425de1..a6be04138b 100644
--- a/test/functional/ex_cmds/echo_spec.lua
+++ b/test/functional/ex_cmds/echo_spec.lua
@@ -181,9 +181,9 @@ describe(':echo :echon :echomsg :echoerr', function()
     end)
 
     it('dumps references to script functions', function()
-      eq('<SNR>2_Test2', eval('String(Test2_f)'))
-      eq("function('<SNR>2_Test2')", eval('StringMsg(Test2_f)'))
-      eq("function('<SNR>2_Test2')", eval('StringErr(Test2_f)'))
+      eq('<SNR>1_Test2', eval('String(Test2_f)'))
+      eq("function('<SNR>1_Test2')", eval('StringMsg(Test2_f)'))
+      eq("function('<SNR>1_Test2')", eval('StringErr(Test2_f)'))
     end)
 
     it('dump references to lambdas', function()
@@ -205,11 +205,11 @@ describe(':echo :echon :echomsg :echoerr', function()
 
     it('dumps automatically created partials', function()
       assert_same_echo_dump(
-        "function('<SNR>2_Test2', {'f': function('<SNR>2_Test2')})",
+        "function('<SNR>1_Test2', {'f': function('<SNR>1_Test2')})",
         '{"f": Test2_f}.f',
         true)
       assert_same_echo_dump(
-        "function('<SNR>2_Test2', [1], {'f': function('<SNR>2_Test2', [1])})",
+        "function('<SNR>1_Test2', [1], {'f': function('<SNR>1_Test2', [1])})",
         '{"f": function(Test2_f, [1])}.f',
         true)
     end)
@@ -227,7 +227,7 @@ describe(':echo :echon :echomsg :echoerr', function()
     function()
       meths.set_var('d', {v=true})
       eq(dedent([[
-          {'p': function('<SNR>2_Test2', {...@0}), 'f': function('<SNR>2_Test2'), 'v': v:true}]]),
+          {'p': function('<SNR>1_Test2', {...@0}), 'f': function('<SNR>1_Test2'), 'v': v:true}]]),
         exec_capture('echo String(extend(extend(g:d, {"f": g:Test2_f}), {"p": g:d.f}))'))
     end)
 
@@ -264,7 +264,7 @@ describe(':echo :echon :echomsg :echoerr', function()
       eval('add(l, function("Test1", l))')
       eval('add(l, function("Test1", d))')
       eq(dedent([=[
-          {'p': function('<SNR>2_Test2', [[[...@3], function('Test1', [[...@3]]), function('Test1', {...@0})], function('Test1', [[[...@5], function('Test1', [[...@5]]), function('Test1', {...@0})]]), function('Test1', {...@0})], {...@0}), 'f': function('<SNR>2_Test2'), 'v': v:true}]=]),
+          {'p': function('<SNR>1_Test2', [[[...@3], function('Test1', [[...@3]]), function('Test1', {...@0})], function('Test1', [[[...@5], function('Test1', [[...@5]]), function('Test1', {...@0})]]), function('Test1', {...@0})], {...@0}), 'f': function('<SNR>1_Test2'), 'v': v:true}]=]),
         exec_capture('echo String(extend(extend(g:d, {"f": g:Test2_f}), {"p": function(g:d.f, l)}))'))
     end)
   end)
diff --git a/test/functional/ex_cmds/script_spec.lua b/test/functional/ex_cmds/script_spec.lua
index f249b9ba7c..bf69ada820 100644
--- a/test/functional/ex_cmds/script_spec.lua
+++ b/test/functional/ex_cmds/script_spec.lua
@@ -2,18 +2,30 @@ local helpers = require('test.functional.helpers')(after_each)
 
 local eq = helpers.eq
 local neq = helpers.neq
+local command = helpers.command
+local write_file = helpers.write_file
 local meths = helpers.meths
 local clear = helpers.clear
 local dedent = helpers.dedent
-local source = helpers.source
 local exc_exec = helpers.exc_exec
 local missing_provider = helpers.missing_provider
 
+local tmpfile = 'X_ex_cmds_script'
+
 before_each(clear)
 
+local function source(code)
+  write_file(tmpfile, code)
+  command('source '..tmpfile)
+end
+
 describe('script_get-based command', function()
   local garbage = ')}{+*({}]*[;(+}{&[]}{*])('
 
+  after_each(function()
+    os.remove(tmpfile)
+  end)
+
   local function test_garbage_exec(cmd, check_neq)
     describe(cmd, function()
       it('works correctly when skipping oneline variant', function()
diff --git a/test/functional/helpers.lua b/test/functional/helpers.lua
index 1845786c4b..173fc54af5 100644
--- a/test/functional/helpers.lua
+++ b/test/functional/helpers.lua
@@ -21,7 +21,6 @@ local map = global_helpers.tbl_map
 local ok = global_helpers.ok
 local sleep = global_helpers.sleep
 local tbl_contains = global_helpers.tbl_contains
-local write_file = global_helpers.write_file
 local fail = global_helpers.fail
 
 local module = {
@@ -54,7 +53,6 @@ if module.nvim_dir == module.nvim_prog then
   module.nvim_dir = "."
 end
 
-local tmpname = global_helpers.tmpname
 local iswin = global_helpers.iswin
 local prepend_argv
 
@@ -494,24 +492,9 @@ function module.feed_command(...)
   end
 end
 
-local sourced_fnames = {}
+-- @deprecated use nvim_exec()
 function module.source(code)
-  local fname = tmpname()
-  write_file(fname, code)
-  module.command('source '..fname)
-  -- DO NOT REMOVE FILE HERE.
-  -- do_source() has a habit of checking whether files are “same” by using inode
-  -- and device IDs. If you run two source() calls in quick succession there is
-  -- a good chance that underlying filesystem will reuse the inode, making files
-  -- appear as “symlinks” to do_source when it checks FileIDs. With current
-  -- setup linux machines (both QB, travis and mine(ZyX-I) with XFS) do reuse
-  -- inodes, Mac OS machines (again, both QB and travis) do not.
-  --
-  -- Files appearing as “symlinks” mean that both the first and the second
-  -- source() calls will use same SID, which may fail some tests which check for
-  -- exact numbers after `<SNR>` in e.g. function names.
-  sourced_fnames[#sourced_fnames + 1] = fname
-  return fname
+  module.exec(dedent(code))
 end
 
 function module.has_powershell()
@@ -525,7 +508,7 @@ function module.set_shell_powershell()
   local cmd = set_encoding..'Remove-Item -Force '..table.concat(iswin()
     and {'alias:cat', 'alias:echo', 'alias:sleep'}
     or  {'alias:echo'}, ',')..';'
-  module.source([[
+  module.exec([[
     let &shell = ']]..shell..[['
     set shellquote= shellxquote=
     let &shellpipe = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
@@ -887,9 +870,6 @@ module = global_helpers.tbl_extend('error', module, global_helpers)
 return function(after_each)
   if after_each then
     after_each(function()
-      for _, fname in ipairs(sourced_fnames) do
-        os.remove(fname)
-      end
       check_logs()
       check_cores('build/bin/nvim')
       if session then
diff --git a/test/functional/legacy/assert_spec.lua b/test/functional/legacy/assert_spec.lua
index dd6a9d0bde..4829a0bbe1 100644
--- a/test/functional/legacy/assert_spec.lua
+++ b/test/functional/legacy/assert_spec.lua
@@ -136,19 +136,19 @@ describe('assert function:', function()
     end)
 
     it('should have file names and passed messages', function()
-      local tmpname_one = source([[
+      source([[
         call assert_equal(1, 100, 'equal assertion failed')
         call assert_false('true', 'true  assertion failed')
         call assert_true('false', 'false assertion failed')
       ]])
-      local tmpname_two = source([[
+      source([[
         call assert_true('', 'file two')
       ]])
       expected_errors({
-        tmpname_one .. " line 1: equal assertion failed: Expected 1 but got 100",
-        tmpname_one .. " line 2: true  assertion failed: Expected False but got 'true'",
-        tmpname_one .. " line 3: false assertion failed: Expected True but got 'false'",
-        tmpname_two .. " line 1: file two: Expected True but got ''",
+        "nvim_exec(): equal assertion failed: Expected 1 but got 100",
+        "nvim_exec(): true  assertion failed: Expected False but got 'true'",
+        "nvim_exec(): false assertion failed: Expected True but got 'false'",
+        "nvim_exec(): file two: Expected True but got ''",
       })
     end)
   end)
diff --git a/test/functional/legacy/memory_usage_spec.lua b/test/functional/legacy/memory_usage_spec.lua
index 8d25b9d927..eec89aa919 100644
--- a/test/functional/legacy/memory_usage_spec.lua
+++ b/test/functional/legacy/memory_usage_spec.lua
@@ -10,6 +10,7 @@ local source = helpers.source
 local poke_eventloop = helpers.poke_eventloop
 local uname = helpers.uname
 local load_adjust = helpers.load_adjust
+local write_file = helpers.write_file
 local isCI = helpers.isCI
 
 local function isasan()
@@ -84,6 +85,12 @@ setmetatable(monitor_memory_usage,
 end})
 
 describe('memory usage', function()
+  local tmpfile = 'X_memory_usage'
+
+  after_each(function()
+    os.remove(tmpfile)
+  end)
+
   local function check_result(tbl, status, result)
     if not status then
       print('')
@@ -103,7 +110,7 @@ describe('memory usage', function()
   it('function capture vargs', function()
     local pid = eval('getpid()')
     local before = monitor_memory_usage(pid)
-    source([[
+    write_file(tmpfile, [[
       func s:f(...)
         let x = a:000
       endfunc
@@ -111,6 +118,8 @@ describe('memory usage', function()
         call s:f(0)
       endfor
     ]])
+    -- TODO: check_result fails if command() is used here. Why? #16064
+    feed_command('source '..tmpfile)
     poke_eventloop()
     local after = monitor_memory_usage(pid)
     -- Estimate the limit of max usage as 2x initial usage.
@@ -136,7 +145,7 @@ describe('memory usage', function()
   it('function capture lvars', function()
     local pid = eval('getpid()')
     local before = monitor_memory_usage(pid)
-    local fname = source([[
+    write_file(tmpfile, [[
       if !exists('s:defined_func')
         func s:f()
           let x = l:
@@ -147,10 +156,12 @@ describe('memory usage', function()
         call s:f()
       endfor
     ]])
+    feed_command('source '..tmpfile)
     poke_eventloop()
     local after = monitor_memory_usage(pid)
     for _ = 1, 3 do
-      feed_command('so '..fname)
+      -- TODO: check_result fails if command() is used here. Why? #16064
+      feed_command('source '..tmpfile)
       poke_eventloop()
     end
     local last = monitor_memory_usage(pid)
diff --git a/test/functional/vimscript/lang_spec.lua b/test/functional/vimscript/lang_spec.lua
index d5254986ab..90437f2ee1 100644
--- a/test/functional/vimscript/lang_spec.lua
+++ b/test/functional/vimscript/lang_spec.lua
@@ -11,6 +11,7 @@ describe('vimscript', function()
       return
     end
     source([[
+      let s:foo = 1
       func! <sid>_dummy_function()
         echo 1
       endfunc