vim-patch:8.1.1327: unnecessary scroll after horizontal split

Problem:    Unnecessary scroll after horizontal split.
Solution:   Don't adjust to fraction if all the text fits in the window.
            (Martin Kunev, closes vim/vim#4367)
https://github.com/vim/vim/commit/a9b2535f44f3265940a18d08520a9ad4ef7bda82

1 files changed, 36 insertions, 0 deletions

diff --git a/src/nvim/testdir/test_window_cmd.vim b/src/nvim/testdir/test_window_cmd.vim
index 72f1baf39e..c41f4f9412 100644
--- a/src/nvim/testdir/test_window_cmd.vim
+++ b/src/nvim/testdir/test_window_cmd.vim
@@ -756,6 +756,42 @@ func Test_relative_cursor_second_line_after_resize()
   let &so = so_save
 endfunc
 
+func Test_split_noscroll()
+  let so_save = &so
+  new
+  only
+
+  " Make sure windows can hold all content after split.
+  for i in range(1, 20)
+    wincmd +
+    redraw!
+  endfor
+
+  call setline (1, range(1, 8))
+  normal 100%
+  split
+
+  1wincmd w
+  let winid1 = win_getid()
+  let info1 = getwininfo(winid1)[0]
+
+  2wincmd w
+  let winid2 = win_getid()
+  let info2 = getwininfo(winid2)[0]
+
+  call assert_equal(1, info1.topline)
+  call assert_equal(1, info2.topline)
+
+  " Restore original state.
+  for i in range(1, 20)
+    wincmd -
+    redraw!
+  endfor
+  only!
+  bwipe!
+  let &so = so_save
+endfunc
+
 " Tests for the winnr() function
 func Test_winnr()
   only | tabonly