patch 8.1.1272: click on WinBar of other window not tested

Problem:    Click on WinBar of other window not tested.
Solution:   Add a test case.

src/testdir/test_winbar.vim

@@ -27,20 +27,24 @@ func Test_add_remove_menu()
   close
 endfunc
 
-func Test_click_in_winbar()
-  new
+" Create a WinBar with three buttons.
+" Columns of the button edges:
+" _Next_  _Cont_  _Close_
+" 2    7  10  15  18   24
+func SetupWinbar()
   amenu 1.10 WinBar.Next :let g:did_next = 11<CR>
   amenu 1.20 WinBar.Cont :let g:did_cont = 12<CR>
   amenu 1.30 WinBar.Close :close<CR>
   redraw
   call assert_match('Next    Cont    Close', Screenline(1))
+endfunc
 
+func Test_click_in_winbar()
+  new
+  call SetupWinbar()
   let save_mouse = &mouse
   set mouse=a
 
-  " Columns of the button edges:
-  " _Next_  _Cont_  _Close_
-  " 2    7  10  15  18   24
   let g:did_next = 0
   let g:did_cont = 0
   for col in [1, 8, 9, 16, 17, 25, 26]
@@ -71,3 +75,38 @@ func Test_click_in_winbar()
 
   let &mouse = save_mouse
 endfunc
+
+func Test_click_in_other_winbar()
+  new
+  call SetupWinbar()
+  let save_mouse = &mouse
+  set mouse=a
+  let winid = win_getid()
+
+  split
+  let [row, col] = win_screenpos(winid)
+
+  " Click on Next button in other window
+  let g:did_next = 0
+  call test_setmouse(row, 5)
+  call feedkeys("\<LeftMouse>", "xt")
+  call assert_equal(11, g:did_next)
+
+  " Click on Cont button in other window from Visual mode
+  let g:did_cont = 0
+  call setline(1, 'select XYZ here')
+  call test_setmouse(row, 12)
+  call feedkeys("0fXvfZ\<LeftMouse>x", "xt")
+  call assert_equal(12, g:did_cont)
+  call assert_equal('select  here', getline(1))
+
+  " Click on Close button in other window
+  let wincount = winnr('$')
+  let winid = win_getid()
+  call test_setmouse(row, 20)
+  call feedkeys("\<LeftMouse>", "xt")
+  call assert_equal(wincount - 1, winnr('$'))
+  call assert_equal(winid, win_getid())
+
+  bwipe!
+endfunc

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1272,
 /**/
     1271,
 /**/