test(lua/fs_spec): fix vim.fs.dir() test

test/functional/lua/fs_spec.lua

@@ -1,4 +1,5 @@
 local helpers = require('test.functional.helpers')(after_each)
+local lfs = require('lfs')
 
 local clear = helpers.clear
 local exec_lua = helpers.exec_lua
@@ -130,6 +131,17 @@ describe('vim.fs', function()
  end)
 
  describe('dir()', function()
+ before_each(function()
+ lfs.mkdir('testd')
+ lfs.mkdir('testd/a')
+ lfs.mkdir('testd/a/b')
+ lfs.mkdir('testd/a/b/c')
+ end)
+
+ after_each(function()
+ rmdir('testd')
+ end)
+
  it('works', function()
  eq(true, exec_lua([[
  local dir, nvim = ...
@@ -143,24 +155,18 @@ describe('vim.fs', function()
  end)
 
  it('works with opts.depth and opts.skip', function()
- if is_os('win') then
- pending()
- end
- helpers.funcs.system 'mkdir -p testd/a/b/c'
- helpers.funcs.system('touch '..table.concat({
- 'testd/a1',
- 'testd/b1',
- 'testd/c1',
- 'testd/a/a2',
- 'testd/a/b2',
- 'testd/a/c2',
- 'testd/a/b/a3',
- 'testd/a/b/b3',
- 'testd/a/b/c3',
- 'testd/a/b/c/a4',
- 'testd/a/b/c/b4',
- 'testd/a/b/c/c4',
- }, ' '))
+ io.open('testd/a1', 'w'):close()
+ io.open('testd/b1', 'w'):close()
+ io.open('testd/c1', 'w'):close()
+ io.open('testd/a/a2', 'w'):close()
+ io.open('testd/a/b2', 'w'):close()
+ io.open('testd/a/c2', 'w'):close()
+ io.open('testd/a/b/a3', 'w'):close()
+ io.open('testd/a/b/b3', 'w'):close()
+ io.open('testd/a/b/c3', 'w'):close()
+ io.open('testd/a/b/c/a4', 'w'):close()
+ io.open('testd/a/b/c/b4', 'w'):close()
+ io.open('testd/a/b/c/c4', 'w'):close()
 
  local function run(dir, depth, skip)
  local r = exec_lua([[