tests: detect invalid helpers.sleep

test/functional/ex_cmds/ctrl_c_spec.lua

@@ -41,7 +41,7 @@ describe("CTRL-C (mapped)", function()
 
     local function test_ctrl_c(ms)
       feed(":global/^/p<CR>")
-      helpers.sleep(ms)
+      screen:sleep(ms)
       feed("<C-C>")
       screen:expect([[Interrupt]], nil, nil, nil, true)
     end

test/functional/helpers.lua

@@ -392,7 +392,16 @@ end
 
 -- sleeps the test runner (_not_ the nvim instance)
 local function sleep(ms)
-  run(nil, nil, nil, ms)
+  local function notification_cb(method, args)
+    local _ = args
+    if method == "redraw" then
+      error("helpers.sleep() called while screen is attached. "..
+            "Use screen:sleep(...) instead")
+    end
+    return true
+  end
+
+  run(nil, notification_cb, nil, ms)
 end
 
 local function curbuf_contents()

test/functional/terminal/ex_terminal_spec.lua

@@ -26,7 +26,7 @@ describe(':terminal', function()
     feed_command([[terminal while true; do echo X; done]])
     helpers.feed([[<C-\><C-N>]])
     wait()
-    screen.sleep(10)  -- Let some terminal activity happen.
+    screen:sleep(10)  -- Let some terminal activity happen.
     feed_command("messages")
     screen:expect([[
       msg1                                              |