[Fix] Remove all Scenarios, catch empty SMILES, prevent default Package delete (#134)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#134

tests/views/test_package_views.py

@@ -178,3 +178,15 @@ class PackageViewTest(TestCase):
 
         response = self.client.get(package_url)
         self.assertEqual(response.status_code, 404)
+
+    def test_delete_default_package(self):
+        self.client.force_login(self.user1)
+        # Try to delete the default package
+        response = self.client.post(self.user1.default_package.url, {
+            "hidden": "delete"
+        })
+
+        self.assertEqual(response.status_code, 400)
+        self.assertTrue(f'You cannot delete the default package. '
+                        f'If you want to delete this package you have to '
+                        f'set another default package first' in response.content.decode())