new_contents: import os
  import stat
  import shutil
  import filecmp
  
  from dvc.main import main
  from dvc.command.imp import CmdImport
  
  from tests.basic_env import TestDvc
  
  
  class TestCmdImport(TestDvc):
      def test(self):
          ret = main(['import',
                      self.FOO, 'import'])
          self.assertEqual(ret, 0)
  
          ret = main(['import',
                      'non-existing-file', 'import'])
          self.assertNotEqual(ret, 0)
  
subject: add basic test from `dvc import` cmd