patch 8.2.2877: insufficient tests for popup menu rightleft

Problem:    Insufficient tests for popup menu rightleft.
Solution:   Add tests. (Yegappan Lakshmanan, closes #8235)
diff --git a/src/testdir/test_popup.vim b/src/testdir/test_popup.vim
index c8f8820..88aeafd 100644
--- a/src/testdir/test_popup.vim
+++ b/src/testdir/test_popup.vim
@@ -1145,4 +1145,73 @@
   unlet g:pum_pos
 endfunc
 
+" Test for the popup menu with the 'rightleft' option set
+func Test_pum_rightleft()
+  CheckScreendump
+  let lines =<< trim END
+    abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
+    vim
+    victory
+  END
+  call writefile(lines, 'Xtest1')
+  let buf = RunVimInTerminal('--cmd "set rightleft" Xtest1', {})
+  call term_wait(buf)
+  call term_sendkeys(buf, "Go\<C-P>")
+  call term_wait(buf)
+  call VerifyScreenDump(buf, 'Test_pum_rightleft_01', {'rows': 8})
+  call term_sendkeys(buf, "\<C-P>\<C-Y>")
+  call term_wait(buf)
+  redraw!
+  call assert_match('\s*miv', Screenline(5))
+
+  " Test for expanding tabs to spaces in the popup menu
+  let lines =<< trim END
+    one	two
+    one	three
+    four
+  END
+  call writefile(lines, 'Xtest2')
+  call term_sendkeys(buf, "\<Esc>:e! Xtest2\<CR>")
+  call term_wait(buf)
+  call term_sendkeys(buf, "Goone\<C-X>\<C-L>")
+  call term_wait(buf)
+  redraw!
+  call VerifyScreenDump(buf, 'Test_pum_rightleft_02', {'rows': 7})
+  call term_sendkeys(buf, "\<C-Y>")
+  call term_wait(buf)
+  redraw!
+  call assert_match('\s*eerht     eno', Screenline(4))
+
+  call StopVimInTerminal(buf)
+  call delete('Xtest1')
+  call delete('Xtest2')
+endfunc
+
+" Test for a popup menu with a scrollbar
+func Test_pum_scrollbar()
+  CheckScreendump
+  let lines =<< trim END
+    one
+    two
+    three
+  END
+  call writefile(lines, 'Xtest1')
+  let buf = RunVimInTerminal('--cmd "set pumheight=2" Xtest1', {})
+  call term_wait(buf)
+  call term_sendkeys(buf, "Go\<C-P>\<C-P>\<C-P>")
+  call term_wait(buf)
+  call VerifyScreenDump(buf, 'Test_pum_scrollbar_01', {'rows': 7})
+  call term_sendkeys(buf, "\<C-E>\<Esc>dd")
+  call term_wait(buf)
+
+  call term_sendkeys(buf, ":set rightleft\<CR>")
+  call term_wait(buf)
+  call term_sendkeys(buf, "Go\<C-P>\<C-P>\<C-P>")
+  call term_wait(buf)
+  call VerifyScreenDump(buf, 'Test_pum_scrollbar_02', {'rows': 7})
+
+  call StopVimInTerminal(buf)
+  call delete('Xtest1')
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab