Use release date from env

and test that joined_before_premium_release property works as expected

.env-dist

@@ -32,3 +32,4 @@ PREMIUM_ENABLED=False
 PREMIUM_PROD_ID=prod_IyCWnXUbkYjDgL
 PREMIUM_PRICE_ID=price_1IMG7KKb9q6OnNsL15Hsn1HE
 SUBSCRIPTIONS_WITH_UNLIMITED="monitor-unlimited,mozilla-one,guardian_vpn"
+PREMIUM_RELEASE_DATE='2021-10-27 17:00:00+00:00'

emails/models.py

@@ -158,9 +158,9 @@ class Profile(models.Model):
         return sum(blocked['num_blocked'] for blocked in relay_addresses_blocked)
 
     @property
-    def created_before_premium_release(self):
+    def joined_before_premium_release(self):
         date_created = self.user.date_joined
-        return date_created < datetime(2021, 10, 27, 18, 00) 
+        return date_created < datetime.fromisoformat(settings.PREMIUM_RELEASE_DATE)
 
     def add_subdomain(self, subdomain):
         if not self.has_premium:

emails/tests/models_tests.py

@@ -511,6 +511,24 @@ class ProfileTest(TestCase):
         profile = Profile.objects.get(user=social_account.user)
         assert profile.display_name == None
 
+    @override_settings(PREMIUM_RELEASE_DATE='2021-10-27 17:00:00+00:00')
+    def test_user_joined_before_premium_release_returns_True(self):
+        user = baker.make(
+            User,
+            date_joined=datetime.now(timezone.utc)
+        )
+        profile = Profile.objects.get(user=user)
+        assert profile.joined_before_premium_release
+
+    @override_settings(PREMIUM_RELEASE_DATE='2021-10-27 17:00:00+00:00')
+    def test_user_joined_before_premium_release_returns_False(self):
+        user = baker.make(
+            User,
+            date_joined=datetime.fromisoformat('2021-10-28 17:00:00+00:00')
+        )
+        profile = Profile.objects.get(user=user)
+        assert profile.joined_before_premium_release is False
+
 
 class DomainAddressTest(TestCase):
     def setUp(self):

privaterelay/settings.py

@@ -12,6 +12,7 @@ https://docs.djangoproject.com/en/2.2/ref/settings/
 
 import ipaddress
 import os
+from datetime import datetime, timezone
 
 from decouple import config
 import markus
@@ -242,6 +243,7 @@ PREMIUM_PRICE_ID = config('PREMIUM_PRICE_ID', '', cast=str)
 SUBSCRIPTIONS_WITH_UNLIMITED = config(
     'SUBSCRIPTIONS_WITH_UNLIMITED', default=''
 )
+PREMIUM_RELEASE_DATE = config('PREMIUM_RELEASE_DATE', str(datetime.now(timezone.utc)), cast=str)
 
 DOMAIN_REGISTRATION_MODAL = config('DOMAIN_REGISTRATION_MODAL', False, cast=bool)