test: improve test conventions

Work on https://github.com/neovim/neovim/issues/27004.

test/benchmark/autocmd_spec.lua

@@ -1,7 +1,7 @@
-local helpers = require('test.functional.helpers')(after_each)
+local t = require('test.functional.testutil')(after_each)
 
-local clear = helpers.clear
-local exec_lua = helpers.exec_lua
+local clear = t.clear
+local exec_lua = t.exec_lua
 
 local N = 7500
 

test/benchmark/bench_regexp_spec.lua

@@ -1,8 +1,8 @@
 -- Test for benchmarking the RE engine.
 
-local helpers = require('test.functional.helpers')(after_each)
-local insert, source = helpers.insert, helpers.source
-local clear, command = helpers.clear, helpers.command
+local t = require('test.functional.testutil')(after_each)
+local insert, source = t.insert, t.source
+local clear, command = t.clear, t.command
 
 -- Temporary file for gathering benchmarking results for each regexp engine.
 local result_file = 'benchmark.out'

test/benchmark/preload.lua

@@ -1,4 +1,4 @@
 -- Modules loaded here will not be cleared and reloaded by Busted.
 -- Busted started doing this to help provide more isolation.  See issue #62
 -- for more information about this.
-local helpers = require('test.functional.helpers')
+local t = require('test.functional.testutil')

test/benchmark/screenpos_spec.lua

@@ -1,5 +1,5 @@
-local helpers = require('test.functional.helpers')(after_each)
-local api = helpers.api
+local t = require('test.functional.testutil')(after_each)
+local api = t.api
 local Screen = require('test.functional.ui.screen')
 
 local function rand_utf8(count, seed)
@@ -78,7 +78,7 @@ local N = 10000
 local function benchmark(lines, expected_value)
   local lnum = #lines
 
-  local results = helpers.exec_lua(
+  local results = t.exec_lua(
     [==[
     local N, lnum = ...
 
@@ -99,7 +99,7 @@ local function benchmark(lines, expected_value)
   )
 
   for _, value in ipairs(results[1]) do
-    helpers.eq(expected_value, value)
+    t.eq(expected_value, value)
   end
   local stats = results[2]
   table.sort(stats)
@@ -119,7 +119,7 @@ end
 
 local function benchmarks(benchmark_results)
   describe('screenpos() perf', function()
-    before_each(helpers.clear)
+    before_each(t.clear)
 
     -- no breakindent
     for li, lines_type in ipairs(benchmark_lines) do
@@ -134,7 +134,7 @@ local function benchmarks(benchmark_results)
           screen:attach()
           api.nvim_buf_set_lines(0, 0, 1, false, lines)
           -- for smaller screen expect (last line always different, first line same as others)
-          helpers.feed('G$')
+          t.feed('G$')
           screen:expect(result.screen)
           benchmark(lines, result.value)
         end)
@@ -153,9 +153,9 @@ local function benchmarks(benchmark_results)
           local screen = Screen.new(width, height + 1)
           screen:attach()
           api.nvim_buf_set_lines(0, 0, 1, false, lines)
-          helpers.command('set breakindent')
+          t.command('set breakindent')
           -- for smaller screen expect (last line always different, first line same as others)
-          helpers.feed('G$')
+          t.feed('G$')
           screen:expect(result.screen)
           benchmark(lines, result.value)
         end)

test/benchmark/treesitter_spec.lua

@@ -1,7 +1,7 @@
-local helpers = require('test.functional.helpers')(after_each)
+local t = require('test.functional.testutil')(after_each)
 
-local clear = helpers.clear
-local exec_lua = helpers.exec_lua
+local clear = t.clear
+local exec_lua = t.exec_lua
 
 describe('treesitter perf', function()
   setup(function()
@@ -9,7 +9,7 @@ describe('treesitter perf', function()
   end)
 
   it('can handle large folds', function()
-    helpers.command 'edit ./src/nvim/eval.c'
+    t.command 'edit ./src/nvim/eval.c'
     exec_lua [[
       local parser = vim.treesitter.get_parser(0, "c", {})
       vim.treesitter.highlighter.new(parser)