vim-patch:9.0.0670: no space for command line when there is a tabline (#20512)

Problem:    No space for command line when there is a tabline.
Solution:   Correct computation of where the command line should be.
            (closes vim/vim#11295)
https://github.com/vim/vim/commit/c9f5f73206272ccad0aa536854debc5f9781978a

1 files changed, 26 insertions, 0 deletions

diff --git a/test/functional/legacy/cmdline_spec.lua b/test/functional/legacy/cmdline_spec.lua
index e7f5c780dc..2fceb6a132 100644
--- a/test/functional/legacy/cmdline_spec.lua
+++ b/test/functional/legacy/cmdline_spec.lua
@@ -5,6 +5,7 @@ local command = helpers.command
 local feed = helpers.feed
 local feed_command = helpers.feed_command
 local exec = helpers.exec
+local meths = helpers.meths
 local pesc = helpers.pesc
 
 describe('cmdline', function()
@@ -213,6 +214,31 @@ describe('cmdline', function()
                                                                   |
     ]])
   end)
+
+  -- oldtest: Test_cmdheight_tabline()
+  it("changing 'cmdheight' when there is a tabline", function()
+    local screen = Screen.new(60, 8)
+    screen:set_default_attr_ids({
+      [0] = {bold = true, foreground = Screen.colors.Blue},  -- NonText
+      [1] = {bold = true, reverse = true},  -- StatusLine
+      [2] = {bold = true},  -- TabLineSel
+      [3] = {reverse = true},  -- TabLineFill
+    })
+    screen:attach()
+    meths.set_option('laststatus', 2)
+    meths.set_option('showtabline', 2)
+    meths.set_option('cmdheight', 1)
+    screen:expect([[
+      {2: [No Name] }{3:                                                 }|
+      ^                                                            |
+      {0:~                                                           }|
+      {0:~                                                           }|
+      {0:~                                                           }|
+      {0:~                                                           }|
+      {1:[No Name]                                                   }|
+                                                                  |
+    ]])
+  end)
 end)
 
 describe('cmdwin', function()