chore: show one accumulated warning instead of multiple warnings

lua/neotest-golang/options.lua

@@ -17,6 +17,7 @@ function Opts:new(opts)
   self.dap_go_enabled = opts.dap_go_enabled or false
   self.dap_go_opts = opts.dap_go_opts or {}
   self.warn_test_name_dupes = opts.warn_test_name_dupes or true
+  self.warn_test_not_executed = opts.warn_test_not_executed or true
 
   -- dev options below, not meant for end-users.
   self.debug_test_not_associated = opts.debug_test_not_associated or false
@@ -29,6 +30,7 @@ function Opts:get()
     dap_go_enabled = self.dap_go_enabled,
     dap_go_opts = self.dap_go_opts,
     warn_test_name_dupes = self.warn_test_name_dupes,
+    warn_test_not_executed = self.warn_test_not_executed,
     debug_test_not_associated = self.debug_test_not_associated,
   }
 end

lua/neotest-golang/results_dir.lua

@@ -285,19 +285,21 @@ function M.show_warnings(d)
     )
   end
 
-  -- warn about duplicate tests
   if options.get().warn_test_name_dupes == true then
+    -- warn about duplicate tests
+    local test_dupes = {}
     for pos_id, test_data in pairs(d) do
       if test_data.duplicate_test_detected == true then
-        vim.notify(
-          "Duplicate test name detected: "
-            .. test_data.gotest_data.pkg
-            .. "/"
-            .. test_data.gotest_data.name,
-          vim.log.levels.WARN
+        table.insert(
+          test_dupes,
+          test_data.gotest_data.pkg .. "/" .. test_data.gotest_data.name
         )
       end
     end
+    vim.notify(
+      "Duplicate test name(s) detected:\n" .. table.concat(test_dupes, "\n"),
+      vim.log.levels.WARN
+    )
   end
 end