Merge #6481 from ZyX-I/rename-execute

Rename execute() function to feed_command()

10 files changed, 175 insertions, 172 deletions

diff --git a/test/functional/eval/api_functions_spec.lua b/test/functional/eval/api_functions_spec.lua
index 21dd228145..7f6f53d226 100644
--- a/test/functional/eval/api_functions_spec.lua
+++ b/test/functional/eval/api_functions_spec.lua
@@ -1,7 +1,7 @@
 local helpers = require('test.functional.helpers')(after_each)
 local Screen = require('test.functional.ui.screen')
 local lfs = require('lfs')
-local neq, eq, execute = helpers.neq, helpers.eq, helpers.execute
+local neq, eq, command = helpers.neq, helpers.eq, helpers.command
 local clear, curbufmeths = helpers.clear, helpers.curbufmeths
 local exc_exec, expect, eval = helpers.exc_exec, helpers.expect, helpers.eval
 local insert = helpers.insert
@@ -10,17 +10,17 @@ describe('api functions', function()
   before_each(clear)
 
   it("work", function()
-    execute("call nvim_command('let g:test = 1')")
+    command("call nvim_command('let g:test = 1')")
     eq(1, eval("nvim_get_var('test')"))
 
     local buf = eval("nvim_get_current_buf()")
-    execute("call nvim_buf_set_lines("..buf..", 0, -1, v:true, ['aa', 'bb'])")
+    command("call nvim_buf_set_lines("..buf..", 0, -1, v:true, ['aa', 'bb'])")
     expect([[
       aa
       bb]])
 
-    execute("call nvim_win_set_cursor(0, [1, 1])")
-    execute("call nvim_input('ax<esc>')")
+    command("call nvim_win_set_cursor(0, [1, 1])")
+    command("call nvim_input('ax<esc>')")
     expect([[
       aax
       bb]])
@@ -57,7 +57,7 @@ describe('api functions', function()
     eq(bnr, bhnd)
     eq(wid, whnd)
 
-    execute("new") -- creates new buffer and new window
+    command("new") -- creates new buffer and new window
     local bnr2 = eval("bufnr('')")
     local bhnd2 = eval("nvim_get_current_buf()")
     local wid2 = eval("win_getid()")
@@ -69,7 +69,7 @@ describe('api functions', function()
     -- 0 is synonymous to the current buffer
     eq(bnr2, eval("nvim_buf_get_number(0)"))
 
-    execute("bn") -- show old buffer in new window
+    command("bn") -- show old buffer in new window
     eq(bnr, eval("nvim_get_current_buf()"))
     eq(bnr, eval("bufnr('')"))
     eq(bnr, eval("nvim_buf_get_number(0)"))
@@ -81,7 +81,7 @@ describe('api functions', function()
     curbufmeths.set_lines(0, -1, true, {"aa\0", "b\0b"})
     eq({'aa\n', 'b\nb'}, eval("nvim_buf_get_lines(0, 0, -1, 1)"))
 
-    execute('call nvim_buf_set_lines(0, 1, 2, v:true, ["xx", "\\nyy"])')
+    command('call nvim_buf_set_lines(0, 1, 2, v:true, ["xx", "\\nyy"])')
     eq({'aa\0', 'xx', '\0yy'}, curbufmeths.get_lines(0, -1, 1))
   end)
 
@@ -124,9 +124,9 @@ describe('api functions', function()
       [5] = {bold = true, foreground = Screen.colors.Blue},
     })
 
-    execute("set ft=vim")
-    execute("let &rtp='build/runtime/,'.&rtp")
-    execute("syntax on")
+    command("set ft=vim")
+    command("let &rtp='build/runtime/,'.&rtp")
+    command("syntax on")
     insert([[
       call bufnr('%')
       call nvim_input('typing...')
diff --git a/test/functional/eval/glob_spec.lua b/test/functional/eval/glob_spec.lua
index 599b3dcdc3..b8807ecfcc 100644
--- a/test/functional/eval/glob_spec.lua
+++ b/test/functional/eval/glob_spec.lua
@@ -1,13 +1,13 @@
 local lfs = require('lfs')
 local helpers = require('test.functional.helpers')(after_each)
-local clear, execute, eval, eq = helpers.clear, helpers.execute, helpers.eval, helpers.eq
+local clear, command, eval, eq = helpers.clear, helpers.command, helpers.eval, helpers.eq
 
 before_each(function()
   clear()
   lfs.mkdir('test-glob')
 
   -- Long path might cause "Press ENTER" prompt; use :silent to avoid it.
-  execute('silent cd test-glob')
+  command('silent cd test-glob')
 end)
 
 after_each(function()
diff --git a/test/functional/eval/json_functions_spec.lua b/test/functional/eval/json_functions_spec.lua
index fc0a19bdfa..4d34cde849 100644
--- a/test/functional/eval/json_functions_spec.lua
+++ b/test/functional/eval/json_functions_spec.lua
@@ -4,16 +4,17 @@ local funcs = helpers.funcs
 local meths = helpers.meths
 local eq = helpers.eq
 local eval = helpers.eval
-local execute = helpers.execute
+local command = helpers.command
 local exc_exec = helpers.exc_exec
 local redir_exec = helpers.redir_exec
 local NIL = helpers.NIL
+local source = helpers.source
 
 describe('json_decode() function', function()
   local restart = function(...)
     clear(...)
-    execute('language C')
-    execute([[
+    source([[
+      language C
       function Eq(exp, act)
         let act = a:act
         let exp = a:exp
@@ -45,8 +46,6 @@ describe('json_decode() function', function()
         endif
         return 1
       endfunction
-    ]])
-    execute([[
       function EvalEq(exp, act_expr)
         let act = eval(a:act_expr)
         if Eq(a:exp, act)
@@ -441,7 +440,7 @@ describe('json_decode() function', function()
   local sp_decode_eq = function(expected, json)
     meths.set_var('__json', json)
     speq(expected, 'json_decode(g:__json)')
-    execute('unlet! g:__json')
+    command('unlet! g:__json')
   end
 
   it('parses strings with NUL properly', function()
@@ -527,7 +526,7 @@ end)
 describe('json_encode() function', function()
   before_each(function()
     clear()
-    execute('language C')
+    command('language C')
   end)
 
   it('dumps strings', function()
@@ -576,94 +575,94 @@ describe('json_encode() function', function()
 
   it('cannot dump generic mapping with generic mapping keys and values',
   function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('let todumpv1 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('let todumpv2 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('call add(todump._VAL, [todumpv1, todumpv2])')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('let todumpv1 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('let todumpv2 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('call add(todump._VAL, [todumpv1, todumpv2])')
     eq('Vim(call):E474: Invalid key in special dictionary', exc_exec('call json_encode(todump)'))
   end)
 
   it('cannot dump generic mapping with ext key', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.ext, "_VAL": [5, ["",""]]}')
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.ext, "_VAL": [5, ["",""]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
     eq('Vim(call):E474: Invalid key in special dictionary', exc_exec('call json_encode(todump)'))
   end)
 
   it('cannot dump generic mapping with array key', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": [5, [""]]}')
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": [5, [""]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
     eq('Vim(call):E474: Invalid key in special dictionary', exc_exec('call json_encode(todump)'))
   end)
 
   it('cannot dump generic mapping with UINT64_MAX key', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.integer}')
-    execute('let todump._VAL = [1, 3, 0x7FFFFFFF, 0x7FFFFFFF]')
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.integer}')
+    command('let todump._VAL = [1, 3, 0x7FFFFFFF, 0x7FFFFFFF]')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
     eq('Vim(call):E474: Invalid key in special dictionary', exc_exec('call json_encode(todump)'))
   end)
 
   it('cannot dump generic mapping with floating-point key', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.float, "_VAL": 0.125}')
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.float, "_VAL": 0.125}')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
     eq('Vim(call):E474: Invalid key in special dictionary', exc_exec('call json_encode(todump)'))
   end)
 
   it('can dump generic mapping with STR special key and NUL', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.string, "_VAL": ["\\n"]}')
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.string, "_VAL": ["\\n"]}')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
     eq('{"\\u0000": 1}', eval('json_encode(todump)'))
   end)
 
   it('can dump generic mapping with BIN special key and NUL', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.binary, "_VAL": ["\\n"]}')
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.binary, "_VAL": ["\\n"]}')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[todump, 1]]}')
     eq('{"\\u0000": 1}', eval('json_encode(todump)'))
   end)
 
   it('can dump STR special mapping with NUL and NL', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.string, "_VAL": ["\\n", ""]}')
+    command('let todump = {"_TYPE": v:msgpack_types.string, "_VAL": ["\\n", ""]}')
     eq('"\\u0000\\n"', eval('json_encode(todump)'))
   end)
 
   it('can dump BIN special mapping with NUL and NL', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.binary, "_VAL": ["\\n", ""]}')
+    command('let todump = {"_TYPE": v:msgpack_types.binary, "_VAL": ["\\n", ""]}')
     eq('"\\u0000\\n"', eval('json_encode(todump)'))
   end)
 
   it('cannot dump special ext mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.ext, "_VAL": [5, ["",""]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.ext, "_VAL": [5, ["",""]]}')
     eq('Vim(call):E474: Unable to convert EXT string to JSON', exc_exec('call json_encode(todump)'))
   end)
 
   it('can dump special array mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": [5, [""]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": [5, [""]]}')
     eq('[5, [""]]', eval('json_encode(todump)'))
   end)
 
   it('can dump special UINT64_MAX mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.integer}')
-    execute('let todump._VAL = [1, 3, 0x7FFFFFFF, 0x7FFFFFFF]')
+    command('let todump = {"_TYPE": v:msgpack_types.integer}')
+    command('let todump._VAL = [1, 3, 0x7FFFFFFF, 0x7FFFFFFF]')
     eq('18446744073709551615', eval('json_encode(todump)'))
   end)
 
   it('can dump special INT64_MIN mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.integer}')
-    execute('let todump._VAL = [-1, 2, 0, 0]')
+    command('let todump = {"_TYPE": v:msgpack_types.integer}')
+    command('let todump._VAL = [-1, 2, 0, 0]')
     eq('-9223372036854775808', eval('json_encode(todump)'))
   end)
 
   it('can dump special BOOLEAN true mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 1}')
+    command('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 1}')
     eq('true', eval('json_encode(todump)'))
   end)
 
   it('can dump special BOOLEAN false mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 0}')
+    command('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 0}')
     eq('false', eval('json_encode(todump)'))
   end)
 
   it('can dump special NIL mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.nil, "_VAL": 0}')
+    command('let todump = {"_TYPE": v:msgpack_types.nil, "_VAL": 0}')
     eq('null', eval('json_encode(todump)'))
   end)
 
@@ -673,7 +672,7 @@ describe('json_encode() function', function()
   end)
 
   it('fails to dump a partial', function()
-    execute('function T() dict\nendfunction')
+    command('function T() dict\nendfunction')
     eq('Vim(call):E474: Error while dumping encode_tv2json() argument, itself: attempt to dump function reference',
        exc_exec('call json_encode(function("T", [1, 2], {}))'))
   end)
@@ -684,56 +683,56 @@ describe('json_encode() function', function()
   end)
 
   it('fails to dump a recursive list', function()
-    execute('let todump = [[[]]]')
-    execute('call add(todump[0][0], todump)')
+    command('let todump = [[[]]]')
+    command('call add(todump[0][0], todump)')
     eq('Vim(call):E724: unable to correctly dump variable with self-referencing container',
        exc_exec('call json_encode(todump)'))
   end)
 
   it('fails to dump a recursive dict', function()
-    execute('let todump = {"d": {"d": {}}}')
-    execute('call extend(todump.d.d, {"d": todump})')
+    command('let todump = {"d": {"d": {}}}')
+    command('call extend(todump.d.d, {"d": todump})')
     eq('Vim(call):E724: unable to correctly dump variable with self-referencing container',
        exc_exec('call json_encode([todump])'))
   end)
 
   it('can dump dict with two same dicts inside', function()
-    execute('let inter = {}')
-    execute('let todump = {"a": inter, "b": inter}')
+    command('let inter = {}')
+    command('let todump = {"a": inter, "b": inter}')
     eq('{"a": {}, "b": {}}', eval('json_encode(todump)'))
   end)
 
   it('can dump list with two same lists inside', function()
-    execute('let inter = []')
-    execute('let todump = [inter, inter]')
+    command('let inter = []')
+    command('let todump = [inter, inter]')
     eq('[[], []]', eval('json_encode(todump)'))
   end)
 
   it('fails to dump a recursive list in a special dict', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
-    execute('call add(todump._VAL, todump)')
+    command('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
+    command('call add(todump._VAL, todump)')
     eq('Vim(call):E724: unable to correctly dump variable with self-referencing container',
        exc_exec('call json_encode(todump)'))
   end)
 
   it('fails to dump a recursive (val) map in a special dict', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('call add(todump._VAL, ["", todump])')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('call add(todump._VAL, ["", todump])')
     eq('Vim(call):E724: unable to correctly dump variable with self-referencing container',
        exc_exec('call json_encode([todump])'))
   end)
 
   it('fails to dump a recursive (val) map in a special dict, _VAL reference', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [["", []]]}')
-    execute('call add(todump._VAL[0][1], todump._VAL)')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [["", []]]}')
+    command('call add(todump._VAL[0][1], todump._VAL)')
     eq('Vim(call):E724: unable to correctly dump variable with self-referencing container',
        exc_exec('call json_encode(todump)'))
   end)
 
   it('fails to dump a recursive (val) special list in a special dict',
   function()
-    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
-    execute('call add(todump._VAL, ["", todump._VAL])')
+    command('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
+    command('call add(todump._VAL, ["", todump._VAL])')
     eq('Vim(call):E724: unable to correctly dump variable with self-referencing container',
        exc_exec('call json_encode(todump)'))
   end)
diff --git a/test/functional/eval/modeline_spec.lua b/test/functional/eval/modeline_spec.lua
index 0be7210a76..c5bb798f4a 100644
--- a/test/functional/eval/modeline_spec.lua
+++ b/test/functional/eval/modeline_spec.lua
@@ -1,5 +1,5 @@
 local helpers = require('test.functional.helpers')(after_each)
-local clear, execute, write_file = helpers.clear, helpers.execute, helpers.write_file
+local clear, command, write_file = helpers.clear, helpers.command, helpers.write_file
 local eq, eval = helpers.eq, helpers.eval
 
 describe("modeline", function()
@@ -12,7 +12,7 @@ describe("modeline", function()
 
   it('does not crash with a large version number', function()
     write_file(tempfile, 'vim100000000000000000000000')
-    execute('e! ' .. tempfile)
+    command('e! ' .. tempfile)
 
     eq(2, eval('1+1'))  -- Still alive?
   end)
diff --git a/test/functional/eval/msgpack_functions_spec.lua b/test/functional/eval/msgpack_functions_spec.lua
index 44c01d2226..c5520deb73 100644
--- a/test/functional/eval/msgpack_functions_spec.lua
+++ b/test/functional/eval/msgpack_functions_spec.lua
@@ -2,7 +2,7 @@ local helpers = require('test.functional.helpers')(after_each)
 local clear = helpers.clear
 local funcs = helpers.funcs
 local eval, eq = helpers.eval, helpers.eq
-local execute = helpers.execute
+local command = helpers.command
 local nvim = helpers.nvim
 local exc_exec = helpers.exc_exec
 
@@ -331,9 +331,9 @@ describe('msgpack*() functions', function()
   obj_test('are able to dump and restore floating-point value', {0.125})
 
   it('can restore and dump UINT64_MAX', function()
-    execute('let dumped = ["\\xCF" . repeat("\\xFF", 8)]')
-    execute('let parsed = msgpackparse(dumped)')
-    execute('let dumped2 = msgpackdump(parsed)')
+    command('let dumped = ["\\xCF" . repeat("\\xFF", 8)]')
+    command('let parsed = msgpackparse(dumped)')
+    command('let dumped2 = msgpackdump(parsed)')
     eq(1, eval('type(parsed[0]) == type(0) ' ..
                '|| parsed[0]._TYPE is v:msgpack_types.integer'))
     if eval('type(parsed[0]) == type(0)') == 1 then
@@ -345,9 +345,9 @@ describe('msgpack*() functions', function()
   end)
 
   it('can restore and dump INT64_MIN', function()
-    execute('let dumped = ["\\xD3\\x80" . repeat("\\n", 7)]')
-    execute('let parsed = msgpackparse(dumped)')
-    execute('let dumped2 = msgpackdump(parsed)')
+    command('let dumped = ["\\xD3\\x80" . repeat("\\n", 7)]')
+    command('let parsed = msgpackparse(dumped)')
+    command('let dumped2 = msgpackdump(parsed)')
     eq(1, eval('type(parsed[0]) == type(0) ' ..
                '|| parsed[0]._TYPE is v:msgpack_types.integer'))
     if eval('type(parsed[0]) == type(0)') == 1 then
@@ -359,33 +359,33 @@ describe('msgpack*() functions', function()
   end)
 
   it('can restore and dump BIN string with zero byte', function()
-    execute('let dumped = ["\\xC4\\x01\\n"]')
-    execute('let parsed = msgpackparse(dumped)')
-    execute('let dumped2 = msgpackdump(parsed)')
+    command('let dumped = ["\\xC4\\x01\\n"]')
+    command('let parsed = msgpackparse(dumped)')
+    command('let dumped2 = msgpackdump(parsed)')
     eq({{_TYPE={}, _VAL={'\n'}}}, eval('parsed'))
     eq(1, eval('parsed[0]._TYPE is v:msgpack_types.binary'))
     eq(1, eval('dumped ==# dumped2'))
   end)
 
   it('can restore and dump STR string with zero byte', function()
-    execute('let dumped = ["\\xA1\\n"]')
-    execute('let parsed = msgpackparse(dumped)')
-    execute('let dumped2 = msgpackdump(parsed)')
+    command('let dumped = ["\\xA1\\n"]')
+    command('let parsed = msgpackparse(dumped)')
+    command('let dumped2 = msgpackdump(parsed)')
     eq({{_TYPE={}, _VAL={'\n'}}}, eval('parsed'))
     eq(1, eval('parsed[0]._TYPE is v:msgpack_types.string'))
     eq(1, eval('dumped ==# dumped2'))
   end)
 
   it('can restore and dump BIN string with NL', function()
-    execute('let dumped = ["\\xC4\\x01", ""]')
-    execute('let parsed = msgpackparse(dumped)')
-    execute('let dumped2 = msgpackdump(parsed)')
+    command('let dumped = ["\\xC4\\x01", ""]')
+    command('let parsed = msgpackparse(dumped)')
+    command('let dumped2 = msgpackdump(parsed)')
     eq({"\n"}, eval('parsed'))
     eq(1, eval('dumped ==# dumped2'))
   end)
 
   it('dump and restore special mapping with floating-point value', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.float, "_VAL": 0.125}')
+    command('let todump = {"_TYPE": v:msgpack_types.float, "_VAL": 0.125}')
     eq({0.125}, eval('msgpackparse(msgpackdump([todump]))'))
   end)
 end)
@@ -394,52 +394,53 @@ describe('msgpackparse() function', function()
   before_each(clear)
 
   it('restores nil as v:null', function()
-    execute('let dumped = ["\\xC0"]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\xC0"]')
+    command('let parsed = msgpackparse(dumped)')
     eq('[v:null]', eval('string(parsed)'))
   end)
 
   it('restores boolean false as v:false', function()
-    execute('let dumped = ["\\xC2"]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\xC2"]')
+    command('let parsed = msgpackparse(dumped)')
     eq({false}, eval('parsed'))
   end)
 
   it('restores boolean true as v:true', function()
-    execute('let dumped = ["\\xC3"]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\xC3"]')
+    command('let parsed = msgpackparse(dumped)')
     eq({true}, eval('parsed'))
   end)
 
   it('restores FIXSTR as special dict', function()
-    execute('let dumped = ["\\xa2ab"]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\xa2ab"]')
+    command('let parsed = msgpackparse(dumped)')
     eq({{_TYPE={}, _VAL={'ab'}}}, eval('parsed'))
     eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.string'))
   end)
 
   it('restores BIN 8 as string', function()
-    execute('let dumped = ["\\xC4\\x02ab"]')
+    command('let dumped = ["\\xC4\\x02ab"]')
     eq({'ab'}, eval('msgpackparse(dumped)'))
   end)
 
   it('restores FIXEXT1 as special dictionary', function()
-    execute('let dumped = ["\\xD4\\x10", ""]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\xD4\\x10", ""]')
+    command('let parsed = msgpackparse(dumped)')
     eq({{_TYPE={}, _VAL={0x10, {"", ""}}}}, eval('parsed'))
     eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.ext'))
   end)
 
   it('restores MAP with BIN key as special dictionary', function()
-    execute('let dumped = ["\\x81\\xC4\\x01a\\xC4\\n"]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\x81\\xC4\\x01a\\xC4\\n"]')
+    command('let parsed = msgpackparse(dumped)')
     eq({{_TYPE={}, _VAL={{'a', ''}}}}, eval('parsed'))
     eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.map'))
   end)
 
   it('restores MAP with duplicate STR keys as special dictionary', function()
-    execute('let dumped = ["\\x82\\xA1a\\xC4\\n\\xA1a\\xC4\\n"]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\x82\\xA1a\\xC4\\n\\xA1a\\xC4\\n"]')
+    -- FIXME Internal error bug
+    command('silent! let parsed = msgpackparse(dumped)')
     eq({{_TYPE={}, _VAL={ {{_TYPE={}, _VAL={'a'}}, ''},
                           {{_TYPE={}, _VAL={'a'}}, ''}}} }, eval('parsed'))
     eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.map'))
@@ -448,8 +449,8 @@ describe('msgpackparse() function', function()
   end)
 
   it('restores MAP with MAP key as special dictionary', function()
-    execute('let dumped = ["\\x81\\x80\\xC4\\n"]')
-    execute('let parsed = msgpackparse(dumped)')
+    command('let dumped = ["\\x81\\x80\\xC4\\n"]')
+    command('let parsed = msgpackparse(dumped)')
     eq({{_TYPE={}, _VAL={{{}, ''}}}}, eval('parsed'))
     eq(1, eval('g:parsed[0]._TYPE is v:msgpack_types.map'))
   end)
@@ -494,7 +495,7 @@ describe('msgpackparse() function', function()
   end)
 
   it('fails to parse a partial', function()
-    execute('function T() dict\nendfunction')
+    command('function T() dict\nendfunction')
     eq('Vim(call):E686: Argument of msgpackparse() must be a List',
        exc_exec('call msgpackparse(function("T", [1, 2], {}))'))
   end)
@@ -514,10 +515,10 @@ describe('msgpackdump() function', function()
   end)
 
   it('can dump generic mapping with generic mapping keys and values', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('let todumpv1 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('let todumpv2 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('call add(todump._VAL, [todumpv1, todumpv2])')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('let todumpv1 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('let todumpv2 = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('call add(todump._VAL, [todumpv1, todumpv2])')
     eq({'\129\128\128'}, eval('msgpackdump([todump])'))
   end)
 
@@ -530,130 +531,130 @@ describe('msgpackdump() function', function()
   end)
 
   it('can v:null', function()
-    execute('let todump = v:null')
+    command('let todump = v:null')
   end)
 
   it('can dump special bool mapping (true)', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 1}')
+    command('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 1}')
     eq({'\195'}, eval('msgpackdump([todump])'))
   end)
 
   it('can dump special bool mapping (false)', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 0}')
+    command('let todump = {"_TYPE": v:msgpack_types.boolean, "_VAL": 0}')
     eq({'\194'}, eval('msgpackdump([todump])'))
   end)
 
   it('can dump special nil mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.nil, "_VAL": 0}')
+    command('let todump = {"_TYPE": v:msgpack_types.nil, "_VAL": 0}')
     eq({'\192'}, eval('msgpackdump([todump])'))
   end)
 
   it('can dump special ext mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.ext, "_VAL": [5, ["",""]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.ext, "_VAL": [5, ["",""]]}')
     eq({'\212\005', ''}, eval('msgpackdump([todump])'))
   end)
 
   it('can dump special array mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": [5, [""]]}')
+    command('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": [5, [""]]}')
     eq({'\146\005\145\196\n'}, eval('msgpackdump([todump])'))
   end)
 
   it('can dump special UINT64_MAX mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.integer}')
-    execute('let todump._VAL = [1, 3, 0x7FFFFFFF, 0x7FFFFFFF]')
+    command('let todump = {"_TYPE": v:msgpack_types.integer}')
+    command('let todump._VAL = [1, 3, 0x7FFFFFFF, 0x7FFFFFFF]')
     eq({'\207\255\255\255\255\255\255\255\255'}, eval('msgpackdump([todump])'))
   end)
 
   it('can dump special INT64_MIN mapping', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.integer}')
-    execute('let todump._VAL = [-1, 2, 0, 0]')
+    command('let todump = {"_TYPE": v:msgpack_types.integer}')
+    command('let todump._VAL = [-1, 2, 0, 0]')
     eq({'\211\128\n\n\n\n\n\n\n'}, eval('msgpackdump([todump])'))
   end)
 
   it('fails to dump a function reference', function()
-    execute('let Todump = function("tr")')
+    command('let Todump = function("tr")')
     eq('Vim(call):E5004: Error while dumping msgpackdump() argument, index 0, itself: attempt to dump function reference',
        exc_exec('call msgpackdump([Todump])'))
   end)
 
   it('fails to dump a partial', function()
-    execute('function T() dict\nendfunction')
-    execute('let Todump = function("T", [1, 2], {})')
+    command('function T() dict\nendfunction')
+    command('let Todump = function("T", [1, 2], {})')
     eq('Vim(call):E5004: Error while dumping msgpackdump() argument, index 0, itself: attempt to dump function reference',
        exc_exec('call msgpackdump([Todump])'))
   end)
 
   it('fails to dump a function reference in a list', function()
-    execute('let todump = [function("tr")]')
+    command('let todump = [function("tr")]')
     eq('Vim(call):E5004: Error while dumping msgpackdump() argument, index 0, index 0: attempt to dump function reference',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive list', function()
-    execute('let todump = [[[]]]')
-    execute('call add(todump[0][0], todump)')
+    command('let todump = [[[]]]')
+    command('call add(todump[0][0], todump)')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 0, index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive dict', function()
-    execute('let todump = {"d": {"d": {}}}')
-    execute('call extend(todump.d.d, {"d": todump})')
+    command('let todump = {"d": {"d": {}}}')
+    command('call extend(todump.d.d, {"d": todump})')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key \'d\', key \'d\', key \'d\'',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('can dump dict with two same dicts inside', function()
-    execute('let inter = {}')
-    execute('let todump = {"a": inter, "b": inter}')
+    command('let inter = {}')
+    command('let todump = {"a": inter, "b": inter}')
     eq({"\130\161a\128\161b\128"}, eval('msgpackdump([todump])'))
   end)
 
   it('can dump list with two same lists inside', function()
-    execute('let inter = []')
-    execute('let todump = [inter, inter]')
+    command('let inter = []')
+    command('let todump = [inter, inter]')
     eq({"\146\144\144"}, eval('msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive list in a special dict', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
-    execute('call add(todump._VAL, todump)')
+    command('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
+    command('call add(todump._VAL, todump)')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (key) map in a special dict', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('call add(todump._VAL, [todump, 0])')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('call add(todump._VAL, [todump, 0])')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 1',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (val) map in a special dict', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
-    execute('call add(todump._VAL, [0, todump])')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": []}')
+    command('call add(todump._VAL, [0, todump])')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key 0 at index 0 from special map',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (key) map in a special dict, _VAL reference', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
-    execute('call add(todump._VAL[0][0], todump._VAL)')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
+    command('call add(todump._VAL[0][0], todump._VAL)')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key [[[[...@0], []]]] at index 0 from special map, index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (val) map in a special dict, _VAL reference', function()
-    execute('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
-    execute('call add(todump._VAL[0][1], todump._VAL)')
+    command('let todump = {"_TYPE": v:msgpack_types.map, "_VAL": [[[], []]]}')
+    command('call add(todump._VAL[0][1], todump._VAL)')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in key [] at index 0 from special map, index 0',
        exc_exec('call msgpackdump([todump])'))
   end)
 
   it('fails to dump a recursive (val) special list in a special dict',
   function()
-    execute('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
-    execute('call add(todump._VAL, [0, todump._VAL])')
+    command('let todump = {"_TYPE": v:msgpack_types.array, "_VAL": []}')
+    command('call add(todump._VAL, [0, todump._VAL])')
     eq('Vim(call):E5005: Unable to dump msgpackdump() argument, index 0: container references itself in index 0, index 1',
        exc_exec('call msgpackdump([todump])'))
   end)
@@ -689,7 +690,7 @@ describe('msgpackdump() function', function()
   end)
 
   it('fails to dump a partial', function()
-    execute('function T() dict\nendfunction')
+    command('function T() dict\nendfunction')
     eq('Vim(call):E686: Argument of msgpackdump() must be a List',
        exc_exec('call msgpackdump(function("T", [1, 2], {}))'))
   end)
diff --git a/test/functional/eval/reltime_spec.lua b/test/functional/eval/reltime_spec.lua
index 0b19d372ec..0181f09024 100644
--- a/test/functional/eval/reltime_spec.lua
+++ b/test/functional/eval/reltime_spec.lua
@@ -1,6 +1,6 @@
 local helpers = require('test.functional.helpers')(after_each)
 local clear, eq, ok = helpers.clear,  helpers.eq, helpers.ok
-local neq, execute, funcs  = helpers.neq, helpers.execute, helpers.funcs
+local neq, command, funcs  = helpers.neq, helpers.command, helpers.funcs
 local reltime, reltimestr, reltimefloat = funcs.reltime, funcs.reltimestr, funcs.reltimefloat
 
 describe('reltimestr(), reltimefloat()', function()
@@ -8,7 +8,7 @@ describe('reltimestr(), reltimefloat()', function()
 
   it('Checks', function()
     local now = reltime()
-    execute('sleep 10m')
+    command('sleep 10m')
     local later = reltime()
     local elapsed = reltime(now)
 
diff --git a/test/functional/eval/setpos_spec.lua b/test/functional/eval/setpos_spec.lua
index 2e27cd8ac0..6a8b3a8732 100644
--- a/test/functional/eval/setpos_spec.lua
+++ b/test/functional/eval/setpos_spec.lua
@@ -3,7 +3,7 @@ local setpos = helpers.funcs.setpos
 local getpos = helpers.funcs.getpos
 local insert = helpers.insert
 local clear = helpers.clear
-local execute = helpers.execute
+local command = helpers.command
 local eval = helpers.eval
 local eq = helpers.eq
 local exc_exec = helpers.exc_exec
@@ -16,7 +16,7 @@ describe('setpos() function', function()
     First line of text
     Second line of text
     Third line of text]])
-    execute('new')
+    command('new')
     insert([[
     Line of text 1
     Line of text 2
@@ -34,7 +34,8 @@ describe('setpos() function', function()
   it('can set lowercase marks in the current buffer', function()
     setpos("'d", {0, 2, 1, 0})
     eq(getpos("'d"), {0, 2, 1, 0})
-    execute('undo', 'call setpos("\'d", [2, 3, 1, 0])')
+    command('undo')
+    command('call setpos("\'d", [2, 3, 1, 0])')
     eq(getpos("'d"), {0, 3, 1, 0})
   end)
   it('can set lowercase marks in other buffers', function()
@@ -42,7 +43,7 @@ describe('setpos() function', function()
     eq(0, retval)
     setpos("'d", {1, 2, 1, 0})
     eq(getpos("'d"), {0, 0, 0, 0})
-    execute('wincmd w')
+    command('wincmd w')
     eq(eval('bufnr("%")'), 1)
     eq(getpos("'d"), {0, 2, 1, 0})
   end)
diff --git a/test/functional/eval/special_vars_spec.lua b/test/functional/eval/special_vars_spec.lua
index 4c5d63ce23..3d9358447e 100644
--- a/test/functional/eval/special_vars_spec.lua
+++ b/test/functional/eval/special_vars_spec.lua
@@ -1,6 +1,6 @@
 local helpers = require('test.functional.helpers')(after_each)
 local exc_exec = helpers.exc_exec
-local execute = helpers.execute
+local command = helpers.command
 local funcs = helpers.funcs
 local clear = helpers.clear
 local eval = helpers.eval
@@ -12,7 +12,7 @@ describe('Special values', function()
   before_each(clear)
 
   it('do not cause error when freed', function()
-    execute([[
+    command([[
       function Test()
         try
           return v:true
@@ -109,7 +109,7 @@ describe('Special values', function()
   it('does not work with +=/-=/.=', function()
     meths.set_var('true', true)
     meths.set_var('false', false)
-    execute('let null = v:null')
+    command('let null = v:null')
 
     eq('Vim(let):E734: Wrong variable type for +=', exc_exec('let true  += 1'))
     eq('Vim(let):E734: Wrong variable type for +=', exc_exec('let false += 1'))
diff --git a/test/functional/eval/system_spec.lua b/test/functional/eval/system_spec.lua
index ee75b593ff..bf95752e3b 100644
--- a/test/functional/eval/system_spec.lua
+++ b/test/functional/eval/system_spec.lua
@@ -1,6 +1,8 @@
 local helpers = require('test.functional.helpers')(after_each)
-local eq, call, clear, eval, execute, feed, nvim =
-  helpers.eq, helpers.call, helpers.clear, helpers.eval, helpers.execute,
+
+local nvim_dir = helpers.nvim_dir
+local eq, call, clear, eval, feed_command, feed, nvim =
+  helpers.eq, helpers.call, helpers.clear, helpers.eval, helpers.feed_command,
   helpers.feed, helpers.nvim
 
 local Screen = require('test.functional.ui.screen')
@@ -31,7 +33,7 @@ describe('system()', function()
 
   describe('command passed as a List', function()
     local function printargs_path()
-      return helpers.nvim_dir..'/printargs-test'
+      return nvim_dir..'/printargs-test'
         .. (helpers.os_name() == 'windows' and '.exe' or '')
     end
 
@@ -43,10 +45,10 @@ describe('system()', function()
     it('parameter validation does NOT modify v:shell_error', function()
       -- 1. Call system() with invalid parameters.
       -- 2. Assert that v:shell_error was NOT set.
-      execute('call system({})')
+      feed_command('call system({})')
       eq('E475: Invalid argument: expected String or List', eval('v:errmsg'))
       eq(0, eval('v:shell_error'))
-      execute('call system([])')
+      feed_command('call system([])')
       eq('E474: Invalid argument', eval('v:errmsg'))
       eq(0, eval('v:shell_error'))
 
@@ -57,9 +59,9 @@ describe('system()', function()
 
       -- 1. Call system() with invalid parameters.
       -- 2. Assert that v:shell_error was NOT modified.
-      execute('call system({})')
+      feed_command('call system({})')
       eq(old_val, eval('v:shell_error'))
-      execute('call system([])')
+      feed_command('call system([])')
       eq(old_val, eval('v:shell_error'))
     end)
 
@@ -182,7 +184,7 @@ describe('system()', function()
     end)
     it('to backgrounded command does not crash', function()
       -- This is indeterminate, just exercise the codepath. May get E5677.
-      execute('call system("echo -n echoed &")')
+      feed_command('call system("echo -n echoed &")')
       local v_errnum = string.match(eval("v:errmsg"), "^E%d*:")
       if v_errnum then
         eq("E5677:", v_errnum)
@@ -197,7 +199,7 @@ describe('system()', function()
     end)
     it('to backgrounded command does not crash', function()
       -- This is indeterminate, just exercise the codepath. May get E5677.
-      execute('call system("cat - &")')
+      feed_command('call system("cat - &")')
       local v_errnum = string.match(eval("v:errmsg"), "^E%d*:")
       if v_errnum then
         eq("E5677:", v_errnum)
diff --git a/test/functional/eval/timer_spec.lua b/test/functional/eval/timer_spec.lua
index b3c4cd07eb..2dd9968a01 100644
--- a/test/functional/eval/timer_spec.lua
+++ b/test/functional/eval/timer_spec.lua
@@ -2,7 +2,7 @@ local helpers = require('test.functional.helpers')(after_each)
 local Screen = require('test.functional.ui.screen')
 local ok, feed, eq, eval = helpers.ok, helpers.feed, helpers.eq, helpers.eval
 local source, nvim_async, run = helpers.source, helpers.nvim_async, helpers.run
-local clear, execute, funcs = helpers.clear, helpers.execute, helpers.funcs
+local clear, command, funcs = helpers.clear, helpers.command, helpers.funcs
 local curbufmeths = helpers.curbufmeths
 
 describe('timers', function()
@@ -17,14 +17,14 @@ describe('timers', function()
   end)
 
   it('works one-shot', function()
-    execute("call timer_start(50, 'MyHandler')")
+    command("call timer_start(50, 'MyHandler')")
     eq(0,eval("g:val"))
     run(nil, nil, nil, 200)
     eq(1,eval("g:val"))
   end)
 
   it('works one-shot when repeat=0', function()
-    execute("call timer_start(50, 'MyHandler', {'repeat': 0})")
+    command("call timer_start(50, 'MyHandler', {'repeat': 0})")
     eq(0,eval("g:val"))
     run(nil, nil, nil, 200)
     eq(1,eval("g:val"))
@@ -32,14 +32,14 @@ describe('timers', function()
 
 
   it('works with repeat two', function()
-    execute("call timer_start(50, 'MyHandler', {'repeat': 2})")
+    command("call timer_start(50, 'MyHandler', {'repeat': 2})")
     eq(0,eval("g:val"))
     run(nil, nil, nil, 300)
     eq(2,eval("g:val"))
   end)
 
   it('are triggered during sleep', function()
-    execute("call timer_start(50, 'MyHandler', {'repeat': 2})")
+    command("call timer_start(50, 'MyHandler', {'repeat': 2})")
     nvim_async("command", "sleep 10")
     eq(0,eval("g:val"))
     run(nil, nil, nil, 300)
@@ -63,12 +63,12 @@ describe('timers', function()
   end)
 
   it('are paused when event processing is disabled', function()
-    execute("call timer_start(50, 'MyHandler', {'repeat': -1})")
+    command("call timer_start(50, 'MyHandler', {'repeat': -1})")
     run(nil, nil, nil, 100)
     local count = eval("g:val")
     -- shows two line error message and thus invokes the return prompt.
     -- if we start to allow event processing here, we need to change this test.
-    execute("throw 'fatal error'")
+    feed(':throw "fatal error"<CR>')
     run(nil, nil, nil, 300)
     feed("<cr>")
     local diff = eval("g:val") - count
@@ -76,7 +76,7 @@ describe('timers', function()
   end)
 
   it('are triggered in blocking getchar() call', function()
-    execute("call timer_start(50, 'MyHandler', {'repeat': -1})")
+    command("call timer_start(50, 'MyHandler', {'repeat': -1})")
     nvim_async("command", "let g:c = getchar()")
     run(nil, nil, nil, 300)
     feed("c")
@@ -157,7 +157,7 @@ describe('timers', function()
         endif
       endfunc
     ]])
-    execute("call timer_start(50, 'MyHandler', {'repeat': -1})")
+    command("call timer_start(50, 'MyHandler', {'repeat': -1})")
     eq(0,eval("g:val"))
     run(nil, nil, nil, 300)
     eq(3,eval("g:val"))
@@ -170,8 +170,8 @@ describe('timers', function()
         let g:val2 += 1
       endfunc
     ]])
-    execute("call timer_start(50,  'MyHandler', {'repeat': 3})")
-    execute("call timer_start(100, 'MyHandler2', {'repeat': 2})")
+    command("call timer_start(50,  'MyHandler', {'repeat': 3})")
+    command("call timer_start(100, 'MyHandler2', {'repeat': 2})")
     run(nil, nil, nil, 300)
     eq(3,eval("g:val"))
     eq(2,eval("g:val2"))
@@ -186,7 +186,7 @@ describe('timers', function()
         let g:val += 1
       endfunc
     ]])
-    execute("call timer_start(5, 'MyHandler', {'repeat': 1})")
+    command("call timer_start(5, 'MyHandler', {'repeat': 1})")
     run(nil, nil, nil, 300)
     eq(1,eval("g:val"))
   end)
@@ -201,7 +201,7 @@ describe('timers', function()
         echo "evil"
       endfunc
     ]])
-    execute("call timer_start(100,  'MyHandler', {'repeat': 1})")
+    command("call timer_start(100,  'MyHandler', {'repeat': 1})")
     feed(":good")
     screen:sleep(200)
     screen:expect([[