feat: click support for 'statusline', 'winbar' #18650

The mouseclick item "%@" is now supported by 'statusline' and 'winbar'.
Previously it was only supported by 'tabline'.

2 files changed, 317 insertions, 260 deletions

diff --git a/test/functional/ui/global_statusline_spec.lua b/test/functional/ui/global_statusline_spec.lua
deleted file mode 100644
index 369c4a31f1..0000000000
--- a/test/functional/ui/global_statusline_spec.lua
+++ /dev/null
@@ -1,260 +0,0 @@
-local helpers = require('test.functional.helpers')(after_each)
-local Screen = require('test.functional.ui.screen')
-local clear, command, feed = helpers.clear, helpers.command, helpers.feed
-local eq, funcs, meths = helpers.eq, helpers.funcs, helpers.meths
-
-describe('global statusline', function()
-  local screen
-
-  before_each(function()
-    clear()
-    screen = Screen.new(60, 16)
-    screen:attach()
-    command('set laststatus=3')
-    command('set ruler')
-  end)
-
-  it('works', function()
-    screen:expect{grid=[[
-      ^                                                            |
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {2:[No Name]                                 0,0-1          All}|
-                                                                  |
-    ]], attr_ids={
-      [1] = {bold = true, foreground = Screen.colors.Blue1};
-      [2] = {bold = true, reverse = true};
-    }}
-
-    feed('i<CR><CR>')
-    screen:expect{grid=[[
-                                                                  |
-                                                                  |
-      ^                                                            |
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {2:[No Name] [+]                             3,1            All}|
-      {3:-- INSERT --}                                                |
-    ]], attr_ids={
-      [1] = {bold = true, foreground = Screen.colors.Blue};
-      [2] = {bold = true, reverse = true};
-      [3] = {bold = true};
-    }}
-  end)
-
-  it('works with splits', function()
-    command('vsplit | split | vsplit | vsplit | wincmd l | split | 2wincmd l | split')
-    screen:expect{grid=[[
-                          │                │ │^                    |
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }├────────────────┤{2:~}│{2:~                   }|
-      {2:~                   }│                │{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}├────────────────────|
-      {2:~                   }│{2:~               }│{2:~}│                    |
-      ────────────────────┴────────────────┴─┤{2:~                   }|
-                                             │{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {3:[No Name]                                 0,0-1          All}|
-                                                                  |
-    ]], attr_ids={
-      [1] = {reverse = true};
-      [2] = {bold = true, foreground = Screen.colors.Blue1};
-      [3] = {bold = true, reverse = true};
-    }}
-  end)
-
-  it('works when switching between values of laststatus', function()
-    command('set laststatus=1')
-    screen:expect{grid=[[
-      ^                                                            |
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-                                                0,0-1         All |
-    ]], attr_ids={
-      [1] = {foreground = Screen.colors.Blue, bold = true};
-    }}
-
-    command('set laststatus=3')
-    screen:expect{grid=[[
-      ^                                                            |
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {1:~                                                           }|
-      {2:[No Name]                                 0,0-1          All}|
-                                                                  |
-    ]], attr_ids={
-      [1] = {foreground = Screen.colors.Blue, bold = true};
-      [2] = {reverse = true, bold = true};
-    }}
-
-    command('vsplit | split | vsplit | vsplit | wincmd l | split | 2wincmd l | split')
-    command('set laststatus=2')
-    screen:expect{grid=[[
-                          │                │ │^                    |
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{1:< Name] 0,0-1   }│{2:~}│{2:~                   }|
-      {2:~                   }│                │{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{3:<No Name] 0,0-1  All}|
-      {2:~                   }│{2:~               }│{2:~}│                    |
-      {1:<No Name] 0,0-1  All < Name] 0,0-1    <}│{2:~                   }|
-                                             │{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {1:[No Name]            0,0-1          All <No Name] 0,0-1  All}|
-                                                                  |
-    ]], attr_ids={
-      [1] = {reverse = true};
-      [2] = {foreground = Screen.colors.Blue, bold = true};
-      [3] = {reverse = true, bold = true};
-    }}
-
-    command('set laststatus=3')
-    screen:expect{grid=[[
-                          │                │ │^                    |
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }├────────────────┤{2:~}│{2:~                   }|
-      {2:~                   }│                │{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}├────────────────────|
-      {2:~                   }│{2:~               }│{2:~}│                    |
-      ────────────────────┴────────────────┴─┤{2:~                   }|
-                                             │{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {3:[No Name]                                 0,0-1          All}|
-                                                                  |
-    ]], attr_ids={
-      [1] = {reverse = true};
-      [2] = {foreground = Screen.colors.Blue, bold = true};
-      [3] = {reverse = true, bold = true};
-    }}
-
-    command('set laststatus=0')
-    screen:expect{grid=[[
-                          │                │ │^                    |
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{1:< Name] 0,0-1   }│{2:~}│{2:~                   }|
-      {2:~                   }│                │{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{3:<No Name] 0,0-1  All}|
-      {2:~                   }│{2:~               }│{2:~}│                    |
-      {1:<No Name] 0,0-1  All < Name] 0,0-1    <}│{2:~                   }|
-                                             │{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-                                                0,0-1         All |
-    ]], attr_ids={
-      [1] = {reverse = true};
-      [2] = {foreground = Screen.colors.Blue, bold = true};
-      [3] = {reverse = true, bold = true};
-    }}
-
-    command('set laststatus=3')
-    screen:expect{grid=[[
-                          │                │ │^                    |
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }├────────────────┤{2:~}│{2:~                   }|
-      {2:~                   }│                │{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}│{2:~                   }|
-      {2:~                   }│{2:~               }│{2:~}├────────────────────|
-      {2:~                   }│{2:~               }│{2:~}│                    |
-      ────────────────────┴────────────────┴─┤{2:~                   }|
-                                             │{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {2:~                                      }│{2:~                   }|
-      {3:[No Name]                                 0,0-1          All}|
-                                                                  |
-    ]], attr_ids={
-      [1] = {reverse = true};
-      [2] = {foreground = Screen.colors.Blue, bold = true};
-      [3] = {reverse = true, bold = true};
-    }}
-  end)
-
-  it('win_move_statusline() can reduce cmdheight to 1', function()
-    eq(1, meths.get_option('cmdheight'))
-    funcs.win_move_statusline(0, -1)
-    eq(2, meths.get_option('cmdheight'))
-    funcs.win_move_statusline(0, -1)
-    eq(3, meths.get_option('cmdheight'))
-    funcs.win_move_statusline(0, 1)
-    eq(2, meths.get_option('cmdheight'))
-    funcs.win_move_statusline(0, 1)
-    eq(1, meths.get_option('cmdheight'))
-  end)
-
-  it('mouse dragging can reduce cmdheight to 1', function()
-    command('set mouse=a')
-    meths.input_mouse('left', 'press', '', 0, 14, 10)
-    eq(1, meths.get_option('cmdheight'))
-    meths.input_mouse('left', 'drag', '', 0, 13, 10)
-    eq(2, meths.get_option('cmdheight'))
-    meths.input_mouse('left', 'drag', '', 0, 12, 10)
-    eq(3, meths.get_option('cmdheight'))
-    meths.input_mouse('left', 'drag', '', 0, 13, 10)
-    eq(2, meths.get_option('cmdheight'))
-    meths.input_mouse('left', 'drag', '', 0, 14, 10)
-    eq(1, meths.get_option('cmdheight'))
-  end)
-end)
diff --git a/test/functional/ui/statusline_spec.lua b/test/functional/ui/statusline_spec.lua
new file mode 100644
index 0000000000..3e1b284856
--- /dev/null
+++ b/test/functional/ui/statusline_spec.lua
@@ -0,0 +1,317 @@
+local helpers = require('test.functional.helpers')(after_each)
+local Screen = require('test.functional.ui.screen')
+local clear = helpers.clear
+local command = helpers.command
+local feed = helpers.feed
+local eq = helpers.eq
+local funcs = helpers.funcs
+local meths = helpers.meths
+local exec = helpers.exec
+local exec_lua = helpers.exec_lua
+local eval = helpers.eval
+
+describe('statusline clicks', function()
+  local screen
+
+  before_each(function()
+    clear()
+    screen = Screen.new(40, 8)
+    screen:attach()
+    command('set laststatus=2')
+    exec([=[
+      function! MyClickFunc(minwid, clicks, button, mods)
+        let g:testvar = printf("%d %d %s", a:minwid, a:clicks, a:button)
+      endfunction
+    ]=])
+  end)
+
+  it('works', function()
+    meths.set_option('statusline', 'Not clicky stuff %0@MyClickFunc@Clicky stuff%T')
+    meths.input_mouse('left', 'press', '', 0, 6, 17)
+    eq('0 1 l', eval("g:testvar"))
+    meths.input_mouse('right', 'press', '', 0, 6, 17)
+    eq('0 1 r', eval("g:testvar"))
+  end)
+
+  it('works for winbar', function()
+    meths.set_option('winbar', 'Not clicky stuff %0@MyClickFunc@Clicky stuff%T')
+    meths.input_mouse('left', 'press', '', 0, 0, 17)
+    eq('0 1 l', eval("g:testvar"))
+    meths.input_mouse('right', 'press', '', 0, 6, 17)
+    eq('0 1 r', eval("g:testvar"))
+  end)
+
+  it('works for winbar in floating window', function()
+    meths.open_win(0, true, { width=30, height=4, relative='editor', row=1, col=5,
+                              border = "single" })
+    meths.set_option_value('winbar', 'Not clicky stuff %0@MyClickFunc@Clicky stuff%T',
+                           { scope = 'local' })
+    meths.input_mouse('left', 'press', '', 0, 2, 23)
+    eq('0 1 l', eval("g:testvar"))
+  end)
+
+  it('works when there are multiple windows', function()
+    command('split')
+    meths.set_option('statusline', 'Not clicky stuff %0@MyClickFunc@Clicky stuff%T')
+    meths.set_option('winbar', 'Not clicky stuff %0@MyClickFunc@Clicky stuff%T')
+    meths.input_mouse('left', 'press', '', 0, 0, 17)
+    eq('0 1 l', eval("g:testvar"))
+    meths.input_mouse('right', 'press', '', 0, 4, 17)
+    eq('0 1 r', eval("g:testvar"))
+    meths.input_mouse('middle', 'press', '', 0, 3, 17)
+    eq('0 1 m', eval("g:testvar"))
+    meths.input_mouse('left', 'press', '', 0, 6, 17)
+    eq('0 1 l', eval("g:testvar"))
+  end)
+
+  it('works with Lua function', function()
+    exec_lua([[
+      function clicky_func(minwid, clicks, button, mods)
+        vim.g.testvar = string.format("%d %d %s", minwid, clicks, button)
+      end
+    ]])
+    meths.set_option('statusline', 'Not clicky stuff %0@v:lua.clicky_func@Clicky stuff%T')
+    meths.input_mouse('left', 'press', '', 0, 6, 17)
+    eq('0 1 l', eval("g:testvar"))
+  end)
+
+  it('ignores unsupported click items', function()
+    command('tabnew | tabprevious')
+    meths.set_option('statusline', '%2TNot clicky stuff%T')
+    meths.input_mouse('left', 'press', '', 0, 6, 0)
+    eq(1, meths.get_current_tabpage().id)
+    meths.set_option('statusline', '%2XNot clicky stuff%X')
+    meths.input_mouse('left', 'press', '', 0, 6, 0)
+    eq(2, #meths.list_tabpages())
+  end)
+end)
+
+describe('global statusline', function()
+  local screen
+
+  before_each(function()
+    clear()
+    screen = Screen.new(60, 16)
+    screen:attach()
+    screen:set_default_attr_ids({
+      [1] = {bold = true, foreground = Screen.colors.Blue};
+      [2] = {bold = true, reverse = true};
+      [3] = {bold = true};
+      [4] = {reverse = true};
+    })
+    command('set laststatus=3')
+    command('set ruler')
+  end)
+
+  it('works', function()
+    screen:expect([[
+      ^                                                            |
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {2:[No Name]                                 0,0-1          All}|
+                                                                  |
+    ]])
+
+    feed('i<CR><CR>')
+    screen:expect([[
+                                                                  |
+                                                                  |
+      ^                                                            |
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {2:[No Name] [+]                             3,1            All}|
+      {3:-- INSERT --}                                                |
+    ]])
+  end)
+
+  it('works with splits', function()
+    command('vsplit | split | vsplit | vsplit | wincmd l | split | 2wincmd l | split')
+    screen:expect([[
+                          │                │ │^                    |
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }├────────────────┤{1:~}│{1:~                   }|
+      {1:~                   }│                │{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}├────────────────────|
+      {1:~                   }│{1:~               }│{1:~}│                    |
+      ────────────────────┴────────────────┴─┤{1:~                   }|
+                                             │{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {2:[No Name]                                 0,0-1          All}|
+                                                                  |
+    ]])
+  end)
+
+  it('works when switching between values of laststatus', function()
+    command('set laststatus=1')
+    screen:expect([[
+      ^                                                            |
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+                                                0,0-1         All |
+    ]])
+
+    command('set laststatus=3')
+    screen:expect([[
+      ^                                                            |
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {1:~                                                           }|
+      {2:[No Name]                                 0,0-1          All}|
+                                                                  |
+    ]])
+
+    command('vsplit | split | vsplit | vsplit | wincmd l | split | 2wincmd l | split')
+    command('set laststatus=2')
+    screen:expect([[
+                          │                │ │^                    |
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{4:< Name] 0,0-1   }│{1:~}│{1:~                   }|
+      {1:~                   }│                │{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{2:<No Name] 0,0-1  All}|
+      {1:~                   }│{1:~               }│{1:~}│                    |
+      {4:<No Name] 0,0-1  All < Name] 0,0-1    <}│{1:~                   }|
+                                             │{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {4:[No Name]            0,0-1          All <No Name] 0,0-1  All}|
+                                                                  |
+    ]])
+
+    command('set laststatus=3')
+    screen:expect([[
+                          │                │ │^                    |
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }├────────────────┤{1:~}│{1:~                   }|
+      {1:~                   }│                │{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}├────────────────────|
+      {1:~                   }│{1:~               }│{1:~}│                    |
+      ────────────────────┴────────────────┴─┤{1:~                   }|
+                                             │{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {2:[No Name]                                 0,0-1          All}|
+                                                                  |
+    ]])
+
+    command('set laststatus=0')
+    screen:expect([[
+                          │                │ │^                    |
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{4:< Name] 0,0-1   }│{1:~}│{1:~                   }|
+      {1:~                   }│                │{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{2:<No Name] 0,0-1  All}|
+      {1:~                   }│{1:~               }│{1:~}│                    |
+      {4:<No Name] 0,0-1  All < Name] 0,0-1    <}│{1:~                   }|
+                                             │{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+                                                0,0-1         All |
+    ]])
+
+    command('set laststatus=3')
+    screen:expect([[
+                          │                │ │^                    |
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }├────────────────┤{1:~}│{1:~                   }|
+      {1:~                   }│                │{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}│{1:~                   }|
+      {1:~                   }│{1:~               }│{1:~}├────────────────────|
+      {1:~                   }│{1:~               }│{1:~}│                    |
+      ────────────────────┴────────────────┴─┤{1:~                   }|
+                                             │{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {1:~                                      }│{1:~                   }|
+      {2:[No Name]                                 0,0-1          All}|
+                                                                  |
+    ]])
+  end)
+
+  it('win_move_statusline() can reduce cmdheight to 1', function()
+    eq(1, meths.get_option('cmdheight'))
+    funcs.win_move_statusline(0, -1)
+    eq(2, meths.get_option('cmdheight'))
+    funcs.win_move_statusline(0, -1)
+    eq(3, meths.get_option('cmdheight'))
+    funcs.win_move_statusline(0, 1)
+    eq(2, meths.get_option('cmdheight'))
+    funcs.win_move_statusline(0, 1)
+    eq(1, meths.get_option('cmdheight'))
+  end)
+
+  it('mouse dragging can reduce cmdheight to 1', function()
+    command('set mouse=a')
+    meths.input_mouse('left', 'press', '', 0, 14, 10)
+    eq(1, meths.get_option('cmdheight'))
+    meths.input_mouse('left', 'drag', '', 0, 13, 10)
+    eq(2, meths.get_option('cmdheight'))
+    meths.input_mouse('left', 'drag', '', 0, 12, 10)
+    eq(3, meths.get_option('cmdheight'))
+    meths.input_mouse('left', 'drag', '', 0, 13, 10)
+    eq(2, meths.get_option('cmdheight'))
+    meths.input_mouse('left', 'drag', '', 0, 14, 10)
+    eq(1, meths.get_option('cmdheight'))
+  end)
+end)