[REFACTOR] Changed error message to a variable

informasi_fasilitas/tests.py

 from django.test import TestCase
 from django.db.utils import IntegrityError
 from .models import Lokasi, Fasilitas, Komentar, KURSI_RODA, RUNNING_TEXT
-# from registrasi.models import User
+from registrasi.models import BisaGoUser
 from django.contrib.auth.models import User
 import tempfile
 
 # Create your tests here.
-class Informasi_Fasilitas_Test(TestCase):
+class InformasiFasilitasTest(TestCase):
+    not_null_constraint_failed = 'NOT NULL constraint failed'
 
     def test_models_lokasi_not_created(self):
         with self.assertRaises(IntegrityError) as cm:
             obj = Lokasi(name=None)
             obj.save();
-        self.assertTrue(str(cm.exception).startswith('NOT NULL constraint failed'))
+        self.assertTrue(str(cm.exception).startswith(not_null_constraint_failed))
 
     def test_models_create_new_lokasi(self):
         image = tempfile.NamedTemporaryFile(suffix=".jpg").name
@@ -31,7 +32,7 @@ class Informasi_Fasilitas_Test(TestCase):
         with self.assertRaises(IntegrityError) as cm:
             obj = Fasilitas(lokasi=None)
             obj.save();
-        self.assertTrue(str(cm.exception).startswith('NOT NULL constraint failed'))
+        self.assertTrue(str(cm.exception).startswith(not_null_constraint_failed))
         
     def test_models_create_new_fasilitas(self):
         image = tempfile.NamedTemporaryFile(suffix=".jpg").name
@@ -68,7 +69,7 @@ class Informasi_Fasilitas_Test(TestCase):
         with self.assertRaises(IntegrityError) as cm:
             obj = Komentar(fasilitas=None)
             obj.save();
-        self.assertTrue(str(cm.exception).startswith('NOT NULL constraint failed'))
+        self.assertTrue(str(cm.exception).startswith(not_null_constraint_failed))
 
     def test_models_create_new_komentar(self):
         image = tempfile.NamedTemporaryFile(suffix=".jpg").name