old_contents: # coding=utf-8
  
  import os
  import shutil
  import tempfile
  import unittest
  
  import six
  
  from conans.client.tools import chdir
  from conans.client.tools import net
  from conans.errors import ConanException
  
  
  class ToolsNetTest(unittest.TestCase):
  
      def run(self, *args, **kwargs):
          self.tmp_folder = tempfile.mkdtemp()
          try:
              with chdir(self.tmp_folder):
                  super(ToolsNetTest, self).run(*args, **kwargs)
          finally:
              shutil.rmtree(self.tmp_folder)
  
      def test_ftp_auth(self):
          filename = "/pub/example/readme.txt"
          net.ftp_download("test.rebex.net", filename, "demo", "password")
          self.assertTrue(os.path.exists(os.path.basename(filename)))
  
      def test_ftp_anonymous(self):
          filename = "1KB.zip"
          net.ftp_download("speedtest.tele2.net", filename)
          self.assertTrue(os.path.exists(os.path.basename(filename)))
  
      def test_ftp_invalid_path(self):
          with six.assertRaisesRegex(self, ConanException,
                                       "550 The system cannot find the file specified."):
              net.ftp_download("test.rebex.net", "invalid-file", "demo", "password")
          self.assertFalse(os.path.exists("invalid-file"))
  
      def test_ftp_invalid_auth(self):
          with six.assertRaisesRegex(self, ConanException, "530 User cannot log in."):
              net.ftp_download("test.rebex.net", "readme.txt", "demo", "invalid")
          self.assertFalse(os.path.exists("readme.txt"))
  
new_contents: # coding=utf-8
  
  import os
  import platform
  import shutil
  import tempfile
  import unittest
  
  import six
  
  from conans.client.tools import chdir
  from conans.client.tools import net
  from conans.errors import ConanException
  
  
  class ToolsNetTest(unittest.TestCase):
  
      def run(self, *args, **kwargs):
          self.tmp_folder = tempfile.mkdtemp()
          try:
              with chdir(self.tmp_folder):
                  super(ToolsNetTest, self).run(*args, **kwargs)
          finally:
              shutil.rmtree(self.tmp_folder)
  
      def test_ftp_auth(self):
          filename = "/pub/example/readme.txt"
          net.ftp_download("test.rebex.net", filename, "demo", "password")
          self.assertTrue(os.path.exists(os.path.basename(filename)))
  
      # FIXME. This was removed cause failures in CI, but doesn't make sense to fail only on OSX
      @unittest.skipIf(platform.system() == "Darwin", "Fails in Macos")
      def test_ftp_anonymous(self):
          filename = "1KB.zip"
          net.ftp_download("speedtest.tele2.net", filename)
          self.assertTrue(os.path.exists(os.path.basename(filename)))
  
      def test_ftp_invalid_path(self):
          with six.assertRaisesRegex(self, ConanException,
                                     "550 The system cannot find the file specified."):
              net.ftp_download("test.rebex.net", "invalid-file", "demo", "password")
          self.assertFalse(os.path.exists("invalid-file"))
  
      def test_ftp_invalid_auth(self):
          with six.assertRaisesRegex(self, ConanException, "530 User cannot log in."):
              net.ftp_download("test.rebex.net", "readme.txt", "demo", "invalid")
          self.assertFalse(os.path.exists("readme.txt"))
  
subject: remove ftp test (#6366)