legacy tests: migrate test_changelist

src/nvim/testdir/test_changelist.in

@@ -1,22 +0,0 @@
-Test changelist position after splitting window
-Set 'undolevels' to make changelist for sourced file
-
-STARTTEST
-:so small.vim
-Gkylp:set ul=100
-Gylp:set ul=100
-gg
-:vsplit
-:try
-:  normal g;
-:  normal ggVGcpass
-:catch
-:  normal ggVGcfail
-:finally
-:  %w! test.out
-:endtry
-:qa!
-ENDTEST
-
-1
-2

src/nvim/testdir/test_changelist.ok

@@ -1 +0,0 @@
-pass

test/functional/legacy/changelist_spec.lua

@@ -0,0 +1,26 @@
+-- Test changelist position after splitting window
+-- Set 'undolevels' to make changelist for sourced file
+
+local helpers = require('test.functional.helpers')
+local clear, feed, insert = helpers.clear, helpers.feed, helpers.insert
+local execute, expect = helpers.execute, helpers.expect
+
+describe('changelist', function()
+  setup(clear)
+
+  it('is working', function()
+    insert("1\n2")
+
+    feed('Gkylp')
+    execute('set ul=100')
+
+    feed('Gylp')
+    execute('set ul=100')
+
+    feed('gg')
+    execute('vsplit')
+    execute('try', 'normal g;', 'normal ggVGcpass', 'catch', 'normal ggVGcfail', 'endtry')
+
+    expect('pass')
+  end)
+end)