auth_fc: add tests on login with minimal user_info (#47566)

tests/auth_fc/test_auth_fc.py

@@ -352,3 +352,28 @@ def test_manager_user_sidebar(app, superuser, simple_user):
 
     response = app.get('/manage/users/%s/' % simple_user.id)
     assert 'FranceConnect' in response
+
+
+def test_user_info_incomplete(settings, app, franceconnect):
+    settings.A2_FC_CREATE = True
+    franceconnect.user_info = {}
+    franceconnect.login_with_fc_fixed_params(app)
+
+    user = User.objects.get()
+    assert app.session['_auth_user_id'] == str(user.pk)
+    fc_account = models.FcAccount.objects.get(user=user)
+    assert fc_account.sub == franceconnect.sub
+    assert fc_account.get_user_info() == {'sub': franceconnect.sub}
+
+
+def test_user_info_incomplete_already_linked(settings, app, franceconnect, simple_user):
+    settings.A2_FC_CREATE = True
+    user = User.objects.create()
+    models.FcAccount.objects.create(user=user, sub=franceconnect.sub)
+    franceconnect.user_info = {}
+    franceconnect.callback_params = {'next': '/accounts/'}
+
+    response = login(app, simple_user, path='/accounts/')
+    response = response.click(href='callback')
+    response = franceconnect.handle_authorization(app, response.location, status=302)
+    assert 'FranceConnect account  is already' in app.cookies['messages']