From 4147302f4be3fe8a5dae3f20a336477cb5f507a4 Mon Sep 17 00:00:00 2001
From: Luuk van Baal <luukvbaal@gmail.com>
Date: Tue, 26 Mar 2024 19:06:39 +0100
Subject: vim-patch:9.1.0211: page-wise scrolling does not support
 smooth-scrolling

Problem:  Page-wise scrolling with Ctrl-F/Ctrl-B implements
          it's own logic to change the topline and cursor.
          In doing so, skipcol is not handled properly for
          'smoothscroll', and virtual lines.
Solution: Re-use the logic from Ctrl-E/Ctrl-Y while staying
          backward compatible as much as possible.

https://github.com/vim/vim/commit/b9f5b95b7bec2414a5a96010514702d99afea18e
---
 test/old/testdir/test_diffmode.vim | 40 +++++++++++++++++++++-----------------
 1 file changed, 22 insertions(+), 18 deletions(-)

(limited to 'test/old/testdir/test_diffmode.vim')

diff --git a/test/old/testdir/test_diffmode.vim b/test/old/testdir/test_diffmode.vim
index c1a63a6f88..3e7eabf8f5 100644
--- a/test/old/testdir/test_diffmode.vim
+++ b/test/old/testdir/test_diffmode.vim
@@ -1632,34 +1632,38 @@ endfunc
 func Test_diff_scroll_many_filler()
   20new
   vnew
-  call setline(1, ['^^^', '^^^', '$$$', '$$$'])
+  call setline(1, range(1, 40))
   diffthis
   setlocal scrolloff=0
   wincmd p
-  call setline(1, ['^^^', '^^^'] + repeat(['###'], 41) + ['$$$', '$$$'])
+  call setline(1, range(1, 20)->reverse() + ['###']->repeat(41) + range(21, 40)->reverse())
   diffthis
   setlocal scrolloff=0
   wincmd p
   redraw
 
   " Note: need a redraw after each scroll, otherwise the test always passes.
-  normal! G
-  redraw
-  call assert_equal(3, winsaveview().topline)
-  call assert_equal(18, winsaveview().topfill)
-  exe "normal! \<C-B>"
-  redraw
-  call assert_equal(3, winsaveview().topline)
-  call assert_equal(19, winsaveview().topfill)
-  exe "normal! \<C-B>"
-  redraw
-  call assert_equal(2, winsaveview().topline)
-  call assert_equal(0, winsaveview().topfill)
-  exe "normal! \<C-B>"
-  redraw
-  call assert_equal(1, winsaveview().topline)
-  call assert_equal(0, winsaveview().topfill)
+  for _ in range(2)
+    normal! G
+    redraw
+    call assert_equal(40, winsaveview().topline)
+    call assert_equal(19, winsaveview().topfill)
+    exe "normal! \<C-B>"
+    redraw
+    call assert_equal(22, winsaveview().topline)
+    call assert_equal(0, winsaveview().topfill)
+    exe "normal! \<C-B>"
+    redraw
+    call assert_equal(4, winsaveview().topline)
+    call assert_equal(0, winsaveview().topfill)
+    exe "normal! \<C-B>"
+    redraw
+    call assert_equal(1, winsaveview().topline)
+    call assert_equal(0, winsaveview().topfill)
+    set smoothscroll
+  endfor
 
+  set smoothscroll&
   bwipe!
   bwipe!
 endfunc
-- 
cgit