feat(diagnostic): add `current_line` option for `virtual_text` handler

1 files changed, 19 insertions, 0 deletions

diff --git a/test/functional/lua/diagnostic_spec.lua b/test/functional/lua/diagnostic_spec.lua
index 9a982a1c6d..a19f558ef2 100644
--- a/test/functional/lua/diagnostic_spec.lua
+++ b/test/functional/lua/diagnostic_spec.lua
@@ -2160,6 +2160,25 @@ describe('vim.diagnostic', function()
       eq(1, #result)
       eq(' An error there!', result[1][4].virt_text[3][1])
     end)
+
+    it('can only show virtual_text for the current line', function()
+      local result = exec_lua(function()
+        vim.api.nvim_win_set_cursor(0, { 1, 0 })
+
+        vim.diagnostic.config({ virtual_text = { current_line = true } })
+
+        vim.diagnostic.set(_G.diagnostic_ns, _G.diagnostic_bufnr, {
+          _G.make_error('Error here!', 0, 0, 0, 0, 'foo_server'),
+          _G.make_error('Another error there!', 1, 0, 1, 0, 'foo_server'),
+        })
+
+        local extmarks = _G.get_virt_text_extmarks(_G.diagnostic_ns)
+        return extmarks
+      end)
+
+      eq(1, #result)
+      eq(' Error here!', result[1][4].virt_text[3][1])
+    end)
   end)
 
   describe('handlers.virtual_lines', function()