refactor(tests): drop os_kill #32401

Also change job tests to use `nvim` instead of random programs like `ping`.

test/functional/core/job_spec.lua

@@ -21,7 +21,6 @@ local rmdir = n.rmdir
 local assert_alive = n.assert_alive
 local command = n.command
 local fn = n.fn
-local os_kill = n.os_kill
 local retry = t.retry
 local api = n.api
 local NIL = vim.NIL
@@ -444,27 +443,23 @@ describe('jobs', function()
   end)
 
   it('disposed on Nvim exit', function()
-    -- use sleep, which doesn't die on stdin close
-    command(
-      "let g:j =  jobstart(has('win32') ? ['ping', '-n', '1001', '127.0.0.1'] : ['sleep', '1000'], g:job_opts)"
-    )
-    local pid = eval('jobpid(g:j)')
-    neq(NIL, api.nvim_get_proc(pid))
+    -- Start a child process which doesn't die on stdin close.
+    local j = n.fn.jobstart({ n.nvim_prog, '--clean', '--headless' })
+    local pid = n.fn.jobpid(j)
+    eq('number', type(api.nvim_get_proc(pid).pid))
     clear()
     eq(NIL, api.nvim_get_proc(pid))
   end)
 
-  it('can survive the exit of nvim with "detach"', function()
-    command('let g:job_opts.detach = 1')
-    command(
-      "let g:j = jobstart(has('win32') ? ['ping', '-n', '1001', '127.0.0.1'] : ['sleep', '1000'], g:job_opts)"
-    )
-    local pid = eval('jobpid(g:j)')
-    neq(NIL, api.nvim_get_proc(pid))
+  it('can survive Nvim exit with "detach"', function()
+    local j = n.fn.jobstart({ n.nvim_prog, '--clean', '--headless' }, { detach = true })
+    local pid = n.fn.jobpid(j)
+    eq('number', type(api.nvim_get_proc(pid).pid))
     clear()
-    neq(NIL, api.nvim_get_proc(pid))
-    -- clean up after ourselves
-    eq(0, os_kill(pid))
+    -- Still alive.
+    eq('number', type(api.nvim_get_proc(pid).pid))
+    -- Clean up after ourselves.
+    eq(0, vim.uv.kill(pid, 'sigkill'))
   end)
 
   it('can pass user data to the callback', function()

test/functional/ex_cmds/swapfile_preserve_recover_spec.lua

@@ -14,7 +14,6 @@ local ok = t.ok
 local rmdir = n.rmdir
 local new_pipename = n.new_pipename
 local pesc = vim.pesc
-local os_kill = n.os_kill
 local set_session = n.set_session
 local async_meths = n.async_meths
 local expect_msg_seq = n.expect_msg_seq
@@ -100,7 +99,7 @@ describe("preserve and (R)ecover with custom 'directory'", function()
   it('with :preserve and SIGKILL', function()
     local swappath1 = setup_swapname()
     command('preserve')
-    os_kill(eval('getpid()'))
+    eq(0, vim.uv.kill(eval('getpid()'), 'sigkill'))
     test_recover(swappath1)
   end)
 

test/functional/testnvim.lua

@@ -978,18 +978,6 @@ function M.add_builddir_to_rtp()
   M.command(string.format([[set rtp+=%s/runtime]], t.paths.test_build_dir))
 end
 
---- Kill (reap) a process by PID.
---- @param pid string
---- @return boolean?
-function M.os_kill(pid)
-  return os.execute(
-    (
-      is_os('win') and 'taskkill /f /t /pid ' .. pid .. ' > nul'
-      or 'kill -9 ' .. pid .. ' > /dev/null'
-    )
-  )
-end
-
 --- Create folder with non existing parents
 --- @param path string
 --- @return boolean?

test/functional/vimscript/system_spec.lua

@@ -12,7 +12,6 @@ local command = n.command
 local insert = n.insert
 local expect = n.expect
 local exc_exec = n.exc_exec
-local os_kill = n.os_kill
 local pcall_err = t.pcall_err
 local is_os = t.is_os
 
@@ -394,7 +393,7 @@ describe('system()', function()
   it("with a program that doesn't close stdout will exit properly after passing input", function()
     local out = eval(string.format("system('%s', 'clip-data')", testprg('streams-test')))
     assert(out:sub(0, 5) == 'pid: ', out)
-    os_kill(out:match('%d+'))
+    eq(0, vim.uv.kill(assert(tonumber(out:match('%d+'))), 'sigkill'))
   end)
 end)
 
@@ -538,7 +537,7 @@ describe('systemlist()', function()
   it("with a program that doesn't close stdout will exit properly after passing input", function()
     local out = eval(string.format("systemlist('%s', 'clip-data')", testprg('streams-test')))
     assert(out[1]:sub(0, 5) == 'pid: ', out)
-    os_kill(out[1]:match('%d+'))
+    eq(0, vim.uv.kill(assert(tonumber(out[1]:match('%d+'))), 'sigkill'))
   end)
 
   it('powershell w/ UTF-8 text #13713', function()