Test that existing user overwrites invite properly

Issue: greg-105

gregui/tests/authentication/test_user_profile.py

@@ -4,7 +4,7 @@ from django.test.client import RequestFactory
 
 from greg.models import Identity
 from gregui.authentication.auth_backends import GregOIDCBackend
-from gregui.models import GregUserProfile
+from gregui.models import GregUserProfile, Person
 
 
 @pytest.mark.django_db
@@ -265,3 +265,56 @@ def test_invited_user_no_id(invited_person_no_ids):
     assert len(person_feide_email) == 1
     assert person_feide_email[0].value == feide_id
     assert person_feide_email[0].verified == Identity.Verified.AUTOMATIC
+
+
+@pytest.mark.django_db
+def test_invited_existing_user(invited_person, user_person):
+    """
+    Invitation login, user with existing person and GregUserProfile
+
+    Expect the person connected to the invite to be deleted and replaced by
+    the existing person
+    """
+    old_user = user_person
+    old_person = GregUserProfile.objects.get(user=old_user).person
+
+    feide_id = (
+        old_person.identities.filter(type=Identity.IdentityType.FEIDE_ID).first().value
+    )
+
+    person, invitation_link = invited_person
+
+    auth_request = RequestFactory().get("/foo", {"code": "foo", "state": "bar"})
+    auth_request.session = {"invite_id": invitation_link.uuid}
+
+    backend = GregOIDCBackend()
+    backend.request = auth_request
+
+    with pytest.raises(GregUserProfile.DoesNotExist):
+        GregUserProfile.objects.get(person=person)
+
+    claims = {
+        "sub": f"{old_user.username}",
+        "connect-userid_sec": [f"feide:{feide_id}"],
+        "dataporten-userid_sec": [f"feide:{feide_id}", f"nin:{old_person.fnr.value}"],
+        "name": f"{old_person.first_name} {old_person.last_name}",
+        "email": f"{feide_id}",
+        "email_verified": True,
+        "picture": "https://foo.org/p:2192dff7-6989-4244-83cc-ae5e78875bdd",
+    }
+
+    # set username like this user was created by logging in
+    old_user.username = backend.get_username(old_user.username)
+    old_user.save()
+
+    assert invitation_link.invitation.role.person == person
+    user = backend.update_user(old_user, claims)
+    invitation_link.refresh_from_db()
+    assert invitation_link.invitation.role.person == old_person
+
+    old_person.refresh_from_db()
+    with pytest.raises(Person.DoesNotExist):
+        person.refresh_from_db()
+
+    user_profile = GregUserProfile.objects.get(user=user)
+    assert user_profile.person == old_person