✅(backend) add extra tests for email search

Test the reverse situation from the previous ones:
if the user searches with accent but the email doesn't have one.

Author: Ash-Crow

src/backend/core/tests/test_api_users.py

@@ -87,6 +87,7 @@ def test_api_users_list_query_email_with_internationalized_domain_names():
     client.force_login(user)
 
     jean = factories.UserFactory(email="jean.martin@éducation.fr")
+    marie = factories.UserFactory(email="marie.durand@education.fr")
     kurokawa = factories.UserFactory(email="contact@黒川.日本")
 
     response = client.get("/api/v1.0/users/?q=jean.martin@education.fr")
@@ -99,6 +100,16 @@ def test_api_users_list_query_email_with_internationalized_domain_names():
     user_ids = [user["id"] for user in response.json()]
     assert user_ids == [str(jean.id)]
 
+    response = client.get("/api/v1.0/users/?q=marie.durand@education.fr")
+    assert response.status_code == 200
+    user_ids = [user["id"] for user in response.json()]
+    assert user_ids == [str(marie.id)]
+
+    response = client.get("/api/v1.0/users/?q=marie.durand@éducation.fr")
+    assert response.status_code == 200
+    user_ids = [user["id"] for user in response.json()]
+    assert user_ids == [str(marie.id)]
+
     response = client.get("/api/v1.0/users/?q=contact@黒川.日本")
     assert response.status_code == 200
     user_ids = [user["id"] for user in response.json()]