test: api: Do not truncate errors <1 MB.

2 files changed, 11 insertions, 3 deletions

diff --git a/test/functional/api/vim_spec.lua b/test/functional/api/vim_spec.lua
index 8f9f155110..60f30dcfe6 100644
--- a/test/functional/api/vim_spec.lua
+++ b/test/functional/api/vim_spec.lua
@@ -412,7 +412,7 @@ describe('api', function()
       eq(5, meths.get_var('avar'))
     end)
 
-    it('throws error on malformated arguments', function()
+    it('throws error on malformed arguments', function()
       local req = {
         {'nvim_set_var', {'avar', 1}},
         {'nvim_set_var'},
@@ -452,6 +452,13 @@ describe('api', function()
     ok(err:match('Invalid option name') ~= nil)
   end)
 
+  it('does not truncate error message <1 MB #5984', function()
+    local very_long_name = 'A'..('x'):rep(10000)..'Z'
+    local status, err = pcall(nvim, 'get_option', very_long_name)
+    eq(false, status)
+    eq(very_long_name, err:match('Ax+Z?'))
+  end)
+
   it("doesn't leak memory on incorrect argument types", function()
     local status, err = pcall(nvim, 'set_current_dir',{'not', 'a', 'dir'})
     eq(false, status)
diff --git a/test/functional/ui/screen.lua b/test/functional/ui/screen.lua
index bcf2a2e3d6..7d9cd6c026 100644
--- a/test/functional/ui/screen.lua
+++ b/test/functional/ui/screen.lua
@@ -312,12 +312,13 @@ function Screen:_redraw(updates)
     -- print(require('inspect')(update))
     local method = update[1]
     for i = 2, #update do
-      local handler = self['_handle_'..method]
+      local handler_name = '_handle_'..method
+      local handler = self[handler_name]
       if handler ~= nil then
         handler(self, unpack(update[i]))
       else
         assert(self._on_event,
-          "Add Screen:_handle_XXX method or call Screen:set_on_event_handler")
+          "Add Screen:"..handler_name.." or call Screen:set_on_event_handler")
         self._on_event(method, update[i])
       end
     end