Add a simple unit test for the settings model

InvenTree/common/models.py

@@ -97,7 +97,7 @@ class InvenTreeSetting(models.Model):
             else:
                 return
             
-        setting.value = value
+        setting.value = str(value)
         setting.save()
 
     key = models.CharField(max_length=50, blank=False, unique=True, help_text=_('Settings key (must be unique - case insensitive'))

InvenTree/common/tests.py

@@ -2,8 +2,9 @@
 from __future__ import unicode_literals
 
 from django.test import TestCase
+from django.contrib.auth import get_user_model
 
-from .models import Currency
+from .models import Currency, InvenTreeSetting
 
 
 class CurrencyTest(TestCase):
@@ -17,3 +18,32 @@ class CurrencyTest(TestCase):
         # Simple test for now (improve this later!)
 
         self.assertEqual(Currency.objects.count(), 2)
+
+
+class SettingsTest(TestCase):
+    """
+    Tests for the 'settings' model
+    """
+
+    def setUp(self):
+
+        User = get_user_model()
+        
+        self.user = User.objects.create_user('username', 'user@email.com', 'password')
+        self.user.is_staff = True
+        self.user.save()
+
+        self.client.login(username='username', password='password')
+
+    def test_defaults(self):
+        """
+        Populate the settings with default values
+        """
+
+        for key in InvenTreeSetting.DEFAULT_VALUES.keys():
+
+            value = InvenTreeSetting.DEFAULT_VALUES[key]
+
+            InvenTreeSetting.set_setting(key, value, self.user)
+
+            self.assertEqual(str(value), InvenTreeSetting.get_setting(key))