minor: fix tests.settings (#90)

Required changes to make it usable with `djanog-admin`.

Author: blueyed

tests/settings.py

@@ -1,5 +1,11 @@
+import os
+
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 DATABASES = {
-    'default': {'ENGINE': 'django.db.backends.sqlite3'}
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+    }
 }
 INSTALLED_APPS = [
     'django.contrib.admin',
@@ -19,5 +25,10 @@
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
         'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.contrib.auth.context_processors.auth',
+            ],
+        },
     },
 ]