Unit tests

	@override_settings(CELERY_ALWAYS_EAGER = True, BROKER_BACKEND = 'memory')
	def test_user_should_get_email_when_is_public_is_true_for_PRIMARY_OFFERINGS_ONLY(self):
		"""
		issue 952 fix
		- if offering is primary and is_public goes from false to true then email should be sent
		- if offering is not primary and is_public goes from false to true no email should be sent
		"""
		self.assertEqual(len(mail.outbox),0)
		self.assertFalse(self.offering.is_public)
		self.assertEquals(self.offering.offer_type, Offering.OFFERING_TYPE_PRIMARY)

		self.offering.is_public = True
		self.offering.save()

		# two users so two emails should get sent
		self.assertEqual(len(mail.outbox),2)

	@override_settings(CELERY_ALWAYS_EAGER = True, BROKER_BACKEND = 'memory')
	def test_user_should_not_get_email_when_is_public_is_true_for_ANYTHING_BESIDES_PRIMARY_OFFERING(self):
		"""
		issue 952 fix
		- if offering is primary and is_public goes from false to true then email should be sent
		- if offering is not primary and is_public goes from false to true no email should be sent
		"""
		self.offering.offer_type = Offering.OFFERING_TYPE_SECONDARY
		self.offering.save()

		self.assertEqual(len(mail.outbox),0)
		self.assertFalse(self.offering.is_public)
		self.assertEquals(self.offering.offer_type, Offering.OFFERING_TYPE_SECONDARY)

		self.offering.is_public = True
		self.offering.save()

		self.assertEqual(len(mail.outbox),0)


Code
	if 'is_public' in dirty_fields and instance.is_public and instance.offer_type == Offering.OFFERING_TYPE_PRIMARY: