old_contents: from gratipay.testing import Harness
  
  class TestNotifications(Harness):
      def test_add_single_notification(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          assert alice.notifications == ["abcd"]
  
      def test_add_multiple_notifications(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          alice.add_notification('1234')
          assert alice.notifications == ["abcd", "1234"]
  
      def test_add_same_notification_twice(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          alice.add_notification('abcd')
          assert alice.notifications == ["abcd"]
  
      def test_remove_notification(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          alice.add_notification('1234')
          alice.add_notification('bcde')
          alice.remove_notification('1234')
          assert alice.notifications == ["abcd", "bcde"]
  
new_contents: from gratipay.testing import Harness
  
  class TestNotifications(Harness):
      def test_add_single_notification(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          assert alice.notifications == ["abcd"]
  
      def test_add_multiple_notifications(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          alice.add_notification('1234')
          assert alice.notifications == ["abcd", "1234"]
  
      def test_add_same_notification_twice(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          alice.add_notification('abcd')
          assert alice.notifications == ["abcd"]
  
      def test_remove_notification(self):
          alice = self.make_participant('alice')
          alice.add_notification('abcd')
          alice.add_notification('1234')
          alice.add_notification('bcde')
          alice.remove_notification('1234')
          assert alice.notifications == ["abcd", "bcde"]
  
      def test_blog_announcement(self):
          assert 'blog/39c07bd031b">indefinitely' in self.client.GET('/').body
  
subject: Add a test for the blog announcement