test: use exec_capture() in more places (#22787)

Problem:
Using `meths.exec2("code", { output = true })` is too verbose.

Solution:
Use exec_capture() in more places.

2 files changed, 6 insertions, 5 deletions

diff --git a/test/functional/core/remote_spec.lua b/test/functional/core/remote_spec.lua
index b2a1679023..f74bb65553 100644
--- a/test/functional/core/remote_spec.lua
+++ b/test/functional/core/remote_spec.lua
@@ -3,11 +3,11 @@ local helpers = require('test.functional.helpers')(after_each)
 local clear = helpers.clear
 local command = helpers.command
 local eq = helpers.eq
+local exec_capture = helpers.exec_capture
 local exec_lua = helpers.exec_lua
 local expect = helpers.expect
 local funcs = helpers.funcs
 local insert = helpers.insert
-local meths = helpers.meths
 local new_argv = helpers.new_argv
 local neq = helpers.neq
 local set_session = helpers.set_session
@@ -101,7 +101,7 @@ describe('Remote', function()
     expect(contents)
     eq(1, #funcs.getbufinfo())
     -- Since we didn't pass silent, we should get a complaint
-    neq(nil, string.find(meths.exec2('messages', { output = true }).output, 'E247'))
+    neq(nil, string.find(exec_capture('messages'), 'E247:'))
   end)
 
   it('creates server if not found with tabs', function()
@@ -110,7 +110,7 @@ describe('Remote', function()
     eq(2, #funcs.gettabinfo())
     eq(2, #funcs.getbufinfo())
     -- We passed silent, so no message should be issued about the server not being found
-    eq(nil, string.find(meths.exec2('messages', { output = true }).output, 'E247'))
+    eq(nil, string.find(exec_capture('messages'), 'E247:'))
   end)
 
   pending('exits with error on', function()
diff --git a/test/functional/core/startup_spec.lua b/test/functional/core/startup_spec.lua
index 4ae8b1c95e..cc94623df3 100644
--- a/test/functional/core/startup_spec.lua
+++ b/test/functional/core/startup_spec.lua
@@ -9,6 +9,7 @@ local ok = helpers.ok
 local eq = helpers.eq
 local matches = helpers.matches
 local eval = helpers.eval
+local exec_capture = helpers.exec_capture
 local exec_lua = helpers.exec_lua
 local feed = helpers.feed
 local funcs = helpers.funcs
@@ -823,7 +824,7 @@ describe('user config init', function()
       clear{ args_rm={'-u'}, env=xenv }
       feed('<cr><c-c>')  -- Dismiss "Conflicting config …" message.
       eq(1, eval('g:lua_rc'))
-      matches('^E5422: Conflicting configs', meths.exec2('messages', { output = true }).output)
+      matches('^E5422: Conflicting configs', exec_capture('messages'))
     end)
   end)
 end)
@@ -872,7 +873,7 @@ describe('runtime:', function()
 
     eq(2, eval('g:lua_plugin'))
     -- Check if plugin_file_path is listed in :scriptname
-    local scripts = meths.exec2(':scriptnames', { output = true }).output
+    local scripts = exec_capture('scriptnames')
     assert(scripts:find(plugin_file_path))
 
     -- Check if plugin_file_path is listed in startup profile