new_contents: """
  Tests for the Subscriptions API class.
  """
  import unittest
  import mws
  from .utils import CommonRequestTestTools
  
  
  class SubscriptionsTestCase(unittest.TestCase, CommonRequestTestTools):
      """
      Test cases for Subscriptions.
      """
      # TODO: Add remaining methods for Subscriptions
      def setUp(self):
          self.api = mws.Subscriptions(
              self.CREDENTIAL_ACCESS,
              self.CREDENTIAL_SECRET,
              self.CREDENTIAL_ACCOUNT,
              auth_token=self.CREDENTIAL_TOKEN
          )
          self.api._test_request_params = True
  
subject: Add stub for Subscriptions API testing