Merge #2819 'tests: Migrate legacy test argument_0count.'.

src/nvim/testdir/Makefile

@@ -30,7 +30,6 @@ SCRIPTS := test_eval.out                                               \
            test_argument_count.out                                     \
            test_close_count.out                                        \
            test_command_count.out                                      \
-           test_argument_0count.out
 
 SCRIPTS_GUI := test16.out
 

src/nvim/testdir/test_argument_0count.in

@@ -1,28 +0,0 @@
-Tests for :0argadd and :0argedit     vim: set ft=vim :
-
-STARTTEST
-:so small.vim
-:let arglists = []
-:%argd
-:arga a b c d
-:2argu
-:0arga added
-:call add(arglists, argv())
-:2argu
-:arga third
-:call add(arglists, argv())
-:%argd
-:arga a b c d
-:2argu
-:0arge edited
-:call add(arglists, argv())
-:2argu
-:arga third
-:call add(arglists, argv())
-:e! test.out
-:call append(0, map(copy(arglists), 'join(v:val, " ")'))
-:w
-:qa!
-ENDTEST
-
-

src/nvim/testdir/test_argument_0count.ok

@@ -1,5 +0,0 @@
-added a b c d
-added a third b c d
-edited a b c d
-edited a third b c d
-

test/functional/legacy/argument_0count_spec.lua

@@ -0,0 +1,28 @@
+-- Tests for :0argadd and :0argedit
+
+local helpers = require('test.functional.helpers')
+local eq, eval, clear, execute =
+  helpers.eq, helpers.eval, helpers.clear, helpers.execute
+
+describe('argument_0count', function()
+  setup(clear)
+
+  it('is working', function()
+    execute('arga a b c d')
+    eq({'a', 'b', 'c', 'd'}, eval('argv()'))
+    execute('2argu')
+    execute('0arga added')
+    eq({'added', 'a', 'b', 'c', 'd'}, eval('argv()'))
+    execute('2argu')
+    execute('arga third')
+    eq({'added', 'a', 'third', 'b', 'c', 'd'}, eval('argv()'))
+    execute('%argd')
+    execute('arga a b c d')
+    execute('2argu')
+    execute('0arge edited')
+    eq({'edited', 'a', 'b', 'c', 'd'}, eval('argv()'))
+    execute('2argu')
+    execute('arga third')
+    eq({'edited', 'a', 'third', 'b', 'c', 'd'}, eval('argv()'))
+  end)
+end)