[Chore] Package Export, Blanks for fields, Styling (#421)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#421

tests/test_compound_model.py

@@ -1,5 +1,7 @@
 from django.conf import settings as s
 from django.test import TestCase, override_settings
+
+from epdb.exceptions import InvalidSMILESException
 from epdb.logic import PackageManager
 from epdb.models import Compound, User, CompoundStructure
 
@@ -33,13 +35,13 @@ class CompoundTest(TestCase):
         self.assertEqual(c.description, "No Desc")
 
     def test_missing_smiles(self):
-        with self.assertRaises(ValueError):
+        with self.assertRaises(InvalidSMILESException):
             _ = Compound.create(self.package, smiles=None, name="Afoxolaner", description="No Desc")
 
-        with self.assertRaises(ValueError):
+        with self.assertRaises(InvalidSMILESException):
             _ = Compound.create(self.package, smiles="", name="Afoxolaner", description="No Desc")
 
-        with self.assertRaises(ValueError):
+        with self.assertRaises(InvalidSMILESException):
             _ = Compound.create(self.package, smiles="  ", name="Afoxolaner", description="No Desc")
 
     def test_smiles_are_trimmed(self):
@@ -96,7 +98,7 @@ class CompoundTest(TestCase):
         self.assertEqual(len(self.package.compounds), 1)
 
     def test_wrong_smiles(self):
-        with self.assertRaises(ValueError):
+        with self.assertRaises(InvalidSMILESException):
             _ = Compound.create(
                 self.package,
                 smiles="C1C(=NOC1(C2=CC(=CC(=C2)Cl)C(F)(F)F)C(F)(F)F)C3=CC=C(C=CC=CC=C43)C(=O)NCC(=O)NCC(F)(F)F",