legacy tests: migrate test4

src/nvim/testdir/test4.in

@@ -1,31 +0,0 @@
-Test for autocommand that changes current buffer on BufEnter event.
-Check if modelines are interpreted for the correct buffer.
-
-STARTTEST
-:so small.vim
-:set nocompatible viminfo+=nviminfo
-:au BufEnter Xxx brew
-/start of
-:.,/end of/w! Xxx   " write test file Xxx
-:set ai modeline modelines=3
-:sp Xxx             " split to Xxx, autocmd will do :brew
-G?this is a
-othis should be auto-indented
-:                   " Append text with autoindent to this file
-:au! BufEnter Xxx
-:buf Xxx            " go to Xxx, no autocmd anymore
-G?this is a
-othis should be in column 1:wq " append text without autoindent to Xxx
-G:r Xxx             " include Xxx in the current file
-:?startstart?,$w! test.out
-:qa!
-ENDTEST
-
-startstart
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-end of test file Xxx

src/nvim/testdir/test4.ok

@@ -1,17 +0,0 @@
-startstart
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-	this should be auto-indented
-end of test file Xxx
-start of test file Xxx
-vim: set noai :
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-this should be in column 1
-end of test file Xxx

test/functional/legacy/004_bufenter_with_modelines_spec.lua

@@ -0,0 +1,72 @@
+-- vim: set foldmethod=marker foldmarker=[[,]] :
+-- Test for autocommand that changes current buffer on BufEnter event.
+-- Check if modelines are interpreted for the correct buffer.
+
+local helpers = require('test.functional.helpers')
+local clear, feed, insert = helpers.clear, helpers.feed, helpers.insert
+local execute, expect = helpers.execute, helpers.expect
+
+describe('BufEnter with modelines', function()
+  setup(clear)
+
+  it('is working', function()
+    insert([[
+      startstart
+      start of test file Xxx
+      vim: set noai :
+          this is a test
+          this is a test
+          this is a test
+          this is a test
+      end of test file Xxx]])
+
+    execute('au BufEnter Xxx brew')
+
+    -- Write test file Xxx
+    execute('/start of')
+    execute('.,/end of/w! Xxx')
+    execute('set ai modeline modelines=3')
+
+    -- Split to Xxx, autocmd will do :brew
+    execute('sp Xxx')
+
+    -- Append text with autoindent to this file
+    feed('G?this is a<Esc>')
+    feed('othis should be auto-indented<Esc>')
+
+    -- Go to Xxx, no autocmd anymore
+    execute('au! BufEnter Xxx')
+    execute('buf Xxx')
+
+    -- Append text without autoindent to Xxx
+    feed('G?this is a<Esc>')
+    feed('othis should be in column 1<Esc>')
+    execute('wq')
+
+    -- Include Xxx in the current file
+    feed('G:r Xxx<CR>')
+
+    expect([[
+      startstart
+      start of test file Xxx
+      vim: set noai :
+          this is a test
+          this is a test
+          this is a test
+          this is a test
+          this should be auto-indented
+      end of test file Xxx
+      start of test file Xxx
+      vim: set noai :
+          this is a test
+          this is a test
+          this is a test
+          this is a test
+      this should be in column 1
+      end of test file Xxx]])
+  end)
+
+  teardown(function()
+    os.remove('Xxx')
+  end)
+end)