legacy tests: migrate test56

src/nvim/testdir/test56.in

@@ -1,21 +0,0 @@
-Test for script-local function.     vim: set ft=vim :
-
-STARTTEST
-:so small.vim
-:"
-:set nocp viminfo+=nviminfo
-:/^start:/+1,/^end:/-1w! Xtest.vim
-:source Xtest.vim
-_x
-:$-1,$wq! test.out
-ENDTEST
-
-start:
-fun <SID>DoLast()
-  call append(line('$'), "last line")
-endfun
-fun s:DoNothing()
-  call append(line('$'), "nothing line")
-endfun
-nnoremap <buffer> _x	:call <SID>DoNothing()<bar>call <SID>DoLast()<bar>delfunc <SID>DoNothing<bar>delfunc <SID>DoLast<cr>
-end:

src/nvim/testdir/test56.ok

@@ -1,2 +0,0 @@
-nothing line
-last line

test/functional/legacy/056_script_local_function_spec.lua

@@ -0,0 +1,31 @@
+-- vim: set foldmethod=marker foldmarker=[[,]] :
+-- Test for script-local function.
+
+local helpers = require('test.functional.helpers')
+local clear, feed, insert = helpers.clear, helpers.feed, helpers.insert
+local execute, expect = helpers.execute, helpers.expect
+
+describe('source function', function()
+  setup(clear)
+
+  it('is working', function()
+    insert([[
+      fun DoLast()
+        call append(line('$'), "last line")
+      endfun
+      fun DoNothing()
+        call append(line('$'), "nothing line")
+      endfun
+      nnoremap <buffer> _x :call DoNothing()<bar>call DoLast()<cr>]])
+
+    feed(':<C-R>=getline(1,3)<cr><cr>')
+    feed(':<C-R>=getline(4,6)<cr><cr>')
+    feed(':<C-R>=getline(7)<cr><cr>')
+    feed('ggdG')
+    feed('_xggdd')
+
+    expect([[
+      nothing line
+      last line]])
+  end)
+end)