add testss for user creation

InvenTree/InvenTree/apps.py

@@ -30,6 +30,7 @@ class InvenTreeConfig(AppConfig):
             if not isInTestMode():
                 self.update_exchange_rates()
 
+        if canAppAccessDatabase() or settings.TESTING:
             self.add_user_on_startup()
 
     def remove_obsolete_tasks(self):
@@ -189,6 +190,8 @@ class InvenTreeConfig(AppConfig):
             logger.info(f'User {str(new_user)} was created!')
         except IntegrityError as _e:
             logger.warning(f'The user "{add_user}" could not be created due to the following error:\n{str(_e)}')
+            if settings.TESTING:
+                raise _e
         except Exception as _e:
             raise _e
 

InvenTree/InvenTree/tests.py

@@ -1,9 +1,13 @@
 
 import json
+from test.support import EnvironmentVarGuard
 
 from django.test import TestCase
 import django.core.exceptions as django_exceptions
 from django.core.exceptions import ValidationError
+from django.contrib.auth import get_user_model
+from django.conf import settings
+from django.db.utils import IntegrityError
 
 from djmoney.money import Money
 from djmoney.contrib.exchange.models import Rate, convert_money
@@ -407,3 +411,47 @@ class TestStatus(TestCase):
 
     def test_Importing(self):
         self.assertEqual(ready.isImportingData(), False)
+
+
+class TestSettings(TestCase):
+    """
+    Unit tests for settings
+    """
+
+    def setUp(self) -> None:
+        self.user_mdl = get_user_model()
+        self.env = EnvironmentVarGuard()
+
+    def run_reload(self):
+        from plugin import registry
+
+        with self.env:
+            settings.USER_ADDED = False
+            registry.reload_plugins()
+
+    def test_set_user_to_few(self):
+        # add shortcut
+        user_count = self.user_mdl.objects.count
+
+        # nothing set
+        self.assertEqual(user_count(), 0)
+
+        # not enough set
+        self.env.set('INVENTREE_SET_USER', 'admin')  # set username
+        self.run_reload()
+        self.assertEqual(user_count(), 0)
+
+        # enough set
+        self.env.set('INVENTREE_SET_USER', 'admin')  # set username
+        self.env.set('INVENTREE_SET_EMAIL', 'info@example.com')  # set email
+        self.env.set('INVENTREE_SET_PASSWORD', 'password123')  # set password
+        self.run_reload()
+        self.assertEqual(user_count(), 1)
+
+        # double adding should not work
+        self.env.set('INVENTREE_SET_USER', 'admin')  # set username
+        self.env.set('INVENTREE_SET_EMAIL', 'info@example.com')  # set email
+        self.env.set('INVENTREE_SET_PASSWORD', 'password123')  # set password
+        with self.assertRaises(IntegrityError):
+            self.run_reload()
+        self.assertEqual(user_count(), 1)