fix(move): redraw for 'concealcursor' after changing w_wcol (#31276)

1 files changed, 32 insertions, 1 deletions

diff --git a/test/functional/ui/syntax_conceal_spec.lua b/test/functional/ui/syntax_conceal_spec.lua
index 57d76e54df..80e38d974a 100644
--- a/test/functional/ui/syntax_conceal_spec.lua
+++ b/test/functional/ui/syntax_conceal_spec.lua
@@ -198,7 +198,7 @@ describe('Screen', function()
       end)
     end) -- a region of text (implicit concealing)
 
-    it('cursor position is correct when entering Insert mode with cocu=ni #13916', function()
+    it('cursor position when entering Insert mode with cocu=ni #13916', function()
       insert([[foobarfoobarfoobar]])
       -- move to end of line
       feed('$')
@@ -217,6 +217,37 @@ describe('Screen', function()
         {4:-- INSERT --}                                         |
       ]])
     end)
+
+    it('cursor position when scrolling in Normal mode with cocu=n #31271', function()
+      insert(('foo\n'):rep(9) .. 'foofoobarfoofoo' .. ('\nfoo'):rep(9))
+      command('set concealcursor=n')
+      command('syn match Foo /bar/ conceal cchar=&')
+      feed('gg5<C-E>10gg$')
+      screen:expect([[
+        foo                                                  |*4
+        foofoo{1:&}foofo^o                                        |
+        foo                                                  |*4
+                                                             |
+      ]])
+      feed('zz')
+      screen:expect_unchanged()
+      feed('zt')
+      screen:expect([[
+        foofoo{1:&}foofo^o                                        |
+        foo                                                  |*8
+                                                             |
+      ]])
+      feed('zt')
+      screen:expect_unchanged()
+      feed('zb')
+      screen:expect([[
+        foo                                                  |*8
+        foofoo{1:&}foofo^o                                        |
+                                                             |
+      ]])
+      feed('zb')
+      screen:expect_unchanged()
+    end)
   end) -- match and conceal
 
   describe('let the conceal level be', function()