fix(buffer_updates): correct buffer updates when splitting empty line

fixes #11591

2 files changed, 19 insertions, 0 deletions

diff --git a/test/functional/api/buffer_updates_spec.lua b/test/functional/api/buffer_updates_spec.lua
index b0efcf0dab..8e43d28322 100644
--- a/test/functional/api/buffer_updates_spec.lua
+++ b/test/functional/api/buffer_updates_spec.lua
@@ -349,6 +349,16 @@ describe('API: buffer events:', function()
     expectn('nvim_buf_lines_event', { b, tick, 3, 4, {}, false })
   end)
 
+  it('visual paste split empty line', function()
+    local b, tick = editoriginal(true, { 'abc', '{', 'def', '}' })
+    command('normal! ggyyjjvi{p')
+    expectn('nvim_buf_lines_event', { b, tick + 1, 2, 3, { '' }, false })
+    expectn('nvim_buf_lines_event', { b, tick + 2, 2, 3, { '}' }, false })
+    expectn('nvim_buf_lines_event', { b, tick + 3, 3, 4, {}, false })
+    expectn('nvim_buf_lines_event', { b, tick + 3, 2, 3, { '' }, false })
+    expectn('nvim_buf_lines_event', { b, tick + 4, 3, 3, { 'abc', '}' }, false })
+  end)
+
   it('when lines are filtered', function()
     -- Test filtering lines with !cat
     local b, tick = editoriginal(true, { 'A', 'C', 'E', 'B', 'D', 'F' })
diff --git a/test/functional/lua/buffer_updates_spec.lua b/test/functional/lua/buffer_updates_spec.lua
index 073ac40ef1..447c1ee345 100644
--- a/test/functional/lua/buffer_updates_spec.lua
+++ b/test/functional/lua/buffer_updates_spec.lua
@@ -1073,6 +1073,15 @@ describe('lua: nvim_buf_attach on_bytes', function()
       }
     end)
 
+    it('visual paste 2: splitting an empty line', function()
+      local check_events = setup_eventcheck(verify, { 'abc', '{', 'def', '}' })
+      feed('ggyyjjvi{p')
+      check_events {
+        { 'test1', 'bytes', 1, 6, 2, 0, 6, 1, 0, 4, 0, 0, 0 },
+        { 'test1', 'bytes', 1, 6, 2, 0, 6, 0, 0, 0, 2, 0, 5 },
+      }
+    end)
+
     it('nvim_buf_set_lines', function()
       local check_events = setup_eventcheck(verify, { 'AAA', 'BBB' })