test: improve test conventions

Specifically, functions that are run in the context of the test runner
are put in module `test/testutil.lua` while the functions that are run
in the context of the test session are put in
`test/functional/testnvim.lua`.

Closes https://github.com/neovim/neovim/issues/27004.

1 files changed, 11 insertions, 10 deletions

diff --git a/test/functional/api/extmark_spec.lua b/test/functional/api/extmark_spec.lua
index 82e7ad3988..70bdb050e5 100644
--- a/test/functional/api/extmark_spec.lua
+++ b/test/functional/api/extmark_spec.lua
@@ -1,20 +1,21 @@
-local t = require('test.functional.testutil')()
+local t = require('test.testutil')
+local n = require('test.functional.testnvim')()
 local Screen = require('test.functional.ui.screen')
 
-local request = t.request
+local request = n.request
 local eq = t.eq
 local ok = t.ok
 local pcall_err = t.pcall_err
-local insert = t.insert
-local feed = t.feed
-local clear = t.clear
-local command = t.command
-local exec = t.exec
-local api = t.api
-local assert_alive = t.assert_alive
+local insert = n.insert
+local feed = n.feed
+local clear = n.clear
+local command = n.command
+local exec = n.exec
+local api = n.api
+local assert_alive = n.assert_alive
 
 local function expect(contents)
-  return eq(contents, t.curbuf_contents())
+  return eq(contents, n.curbuf_contents())
 end
 
 local function set_extmark(ns_id, id, line, col, opts)