def setUp(self): # Make a temp directory and test file self.source_dir = tempfile.mkdtemp() self.dest_dir = os.path.join(self.source_dir, 'dest/') os.mkdir(self.dest_dir) self.test_filename = "test.txt" self.source_file = os.path.join(self.source_dir, self.test_filename) self.dest_file = os.path.join(self.dest_dir, self.test_filename) with open(self.source_file, 'w') as output: output.write("This is a test file.") self.action = MoveTo(self.dest_dir)