fix(lsp): hover keymap (#31208)

* fix: use function call in keymap

* fix: test

2 files changed, 13 insertions, 4 deletions

diff --git a/runtime/lua/vim/lsp.lua b/runtime/lua/vim/lsp.lua
index c032d25cb1..6d29c9e4df 100644
--- a/runtime/lua/vim/lsp.lua
+++ b/runtime/lua/vim/lsp.lua
@@ -371,7 +371,9 @@ function lsp._set_defaults(client, bufnr)
       and is_empty_or_default(bufnr, 'keywordprg')
       and vim.fn.maparg('K', 'n', false, false) == ''
     then
-      vim.keymap.set('n', 'K', vim.lsp.buf.hover, { buffer = bufnr, desc = 'vim.lsp.buf.hover()' })
+      vim.keymap.set('n', 'K', function()
+        vim.lsp.buf.hover()
+      end, { buffer = bufnr, desc = 'vim.lsp.buf.hover()' })
     end
   end)
   if client:supports_method(ms.textDocument_diagnostic) then
diff --git a/test/functional/plugin/lsp_spec.lua b/test/functional/plugin/lsp_spec.lua
index f14e24bb19..332a1a48bb 100644
--- a/test/functional/plugin/lsp_spec.lua
+++ b/test/functional/plugin/lsp_spec.lua
@@ -466,10 +466,17 @@ describe('LSP', function()
               true,
               exec_lua(function()
                 local keymap --- @type table<string,any>
+                local called = false
+                local origin = vim.lsp.buf.hover
+                vim.lsp.buf.hover = function()
+                  called = true
+                end
                 vim._with({ buf = _G.BUFFER }, function()
                   keymap = vim.fn.maparg('K', 'n', false, true)
                 end)
-                return keymap.callback == vim.lsp.buf.hover
+                keymap.callback()
+                vim.lsp.buf.hover = origin
+                return called
               end)
             )
             client:stop()
@@ -480,13 +487,13 @@ describe('LSP', function()
           eq('', get_buf_option('omnifunc'))
           eq('', get_buf_option('formatexpr'))
           eq(
-            '',
+            true,
             exec_lua(function()
               local keymap --- @type string
               vim._with({ buf = _G.BUFFER }, function()
                 keymap = vim.fn.maparg('K', 'n', false, false)
               end)
-              return keymap
+              return keymap:match('<Lua %d+: .+/runtime/lua/vim/lsp%.lua:%d+>') ~= nil
             end)
           )
         end,