legacy tests: migrate test6

src/nvim/testdir/test6.in

@@ -1,24 +0,0 @@
-Test for autocommand that redefines the argument list, when doing ":all".
-
-STARTTEST
-:so small.vim
-:au BufReadPost Xxx2 next Xxx2 Xxx1
-/^start of
-A1:.,/end of/w! Xxx1    " write test file Xxx1
-$r2:.,/end of/w! Xxx2     " write test file Xxx2
-$r3:.,/end of/w! Xxx3     " write test file Xxx3
-:next! Xxx1 Xxx2 Xxx3     " redefine arglist; go to Xxx1
-:all                      " open window for all args
-:w! test.out              " Write contents of Xxx1
-:w >>test.out     " Append contents of last window (Xxx1)
-:rew                      " should now be in Xxx2
-:w >>test.out             " Append contents of Xxx2
-:qa!
-ENDTEST
-
-start of test file Xxx
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-end of test file Xxx

src/nvim/testdir/test6.ok

@@ -1,18 +0,0 @@
-start of test file Xxx1
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-end of test file Xxx
-start of test file Xxx1
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-end of test file Xxx
-start of test file Xxx2
-	this is a test
-	this is a test
-	this is a test
-	this is a test
-end of test file Xxx

test/functional/legacy/006_argument_list_spec.lua

@@ -0,0 +1,81 @@
+-- Test for autocommand that redefines the argument list, when doing ":all".
+
+local helpers = require('test.functional.helpers')
+local clear, feed, insert = helpers.clear, helpers.feed, helpers.insert
+local execute, dedent, eq = helpers.execute, helpers.dedent, helpers.eq
+local curbuf_contents = helpers.curbuf_contents
+
+describe('argument list', function()
+  setup(clear)
+
+  it('is working', function()
+    insert([[
+      start of test file Xxx
+          this is a test
+          this is a test
+          this is a test
+          this is a test
+      end of test file Xxx]])
+
+    execute('au BufReadPost Xxx2 next Xxx2 Xxx1')
+    execute('/^start of')
+    
+    -- Write test file Xxx1
+    feed('A1<Esc>:.,/end of/w! Xxx1<cr>')
+
+    -- Write test file Xxx2
+    feed('$r2:.,/end of/w! Xxx2<cr>')
+
+    -- Write test file Xxx3
+    feed('$r3:.,/end of/w! Xxx3<cr>')
+
+    -- Redefine arglist; go to Xxx1
+    execute('next! Xxx1 Xxx2 Xxx3')
+    
+    -- Open window for all args
+    execute('all')
+    
+    -- Write contents of Xxx1
+    execute('%yank A')
+
+    -- Append contents of last window (Xxx1)
+    feed('')
+    execute('%yank A')
+    
+    -- should now be in Xxx2
+    execute('rew')
+    
+    -- Append contents of Xxx2
+    execute('%yank A')
+
+    execute('%d')
+    execute('0put=@a')
+    execute('1d | $d')
+
+    eq(dedent([[
+      start of test file Xxx1
+          this is a test
+          this is a test
+          this is a test
+          this is a test
+      end of test file Xxx
+      start of test file Xxx1
+          this is a test
+          this is a test
+          this is a test
+          this is a test
+      end of test file Xxx
+      start of test file Xxx2
+          this is a test
+          this is a test
+          this is a test
+          this is a test
+      end of test file Xxx]]), curbuf_contents())
+  end)
+
+  teardown(function()
+    os.remove('Xxx1')   
+    os.remove('Xxx2')   
+    os.remove('Xxx3')   
+  end)
+end)