new_contents: from sendgrid.helpers.mail.spam_check import SpamCheck
  
  try:
      import unittest2 as unittest
  except ImportError:
      import unittest
  
  
  class UnitTests(unittest.TestCase):
  
      def test_spam_all_values(self):
          expected = {'enable': True, 'threshold': 5, 'post_to_url': 'https://www.test.com'}
          spam_check = SpamCheck(enable=True, threshold=5, post_to_url='https://www.test.com')
          self.assertEqual(spam_check.get(), expected)
  
      def test_spam_no_url(self):
          expected = {'enable': True, 'threshold': 10}
          spam_check = SpamCheck(enable=True, threshold=10)
          self.assertEqual(spam_check.get(), expected)
  
      def test_spam_no_threshold(self):
          expected = {'enable': True}
          spam_check = SpamCheck(enable=True)
          self.assertEqual(spam_check.get(), expected)
  
      def test_has_values_but_not_enabled(self):
          expected = {'enable': False, 'threshold': 1, 'post_to_url': 'https://www.test.com'}
          spam_check = SpamCheck(enable=False, threshold=1, post_to_url='https://www.test.com')
          self.assertEqual(spam_check.get(), expected)
  
      def test_spam_change_properties(self):
          expected = {'enable': False, 'threshold': 10, 'post_to_url': 'https://www.testing.com'}
          spam_check = SpamCheck(enable=True, threshold=5, post_to_url='https://www.test.com')
          spam_check.enable = False
          spam_check.threshold = 10
          spam_check.post_to_url = 'https://www.testing.com'
          self.assertEqual(spam_check.get(), expected)
  
  
subject: Add unit tests for spam check