fix: isolate Django tests from SMTP

backend/azionelab/settings.py

@@ -1,4 +1,5 @@
 import os
+import sys
 from pathlib import Path
 
 import dj_database_url
@@ -102,6 +103,15 @@ TIME_ZONE = os.environ.get("TIME_ZONE", "Europe/Rome")
 USE_I18N = True
 USE_TZ = True
 
+EMAIL_BACKEND = os.environ.get(
+    "EMAIL_BACKEND",
+    "django.core.mail.backends.smtp.EmailBackend",
+)
+DEFAULT_FROM_EMAIL = os.environ.get("DEFAULT_FROM_EMAIL", "no-reply@azionelab.local")
+
+if "test" in sys.argv:
+    EMAIL_BACKEND = "django.core.mail.backends.locmem.EmailBackend"
+
 STATIC_URL = "static/"
 DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"