Add tests for domain model and domain extras models

Add string reprs to domain models
Fix misnamed dict key names on domain model
Fix improper timedelta/int conversions on domain model

tests/test_database_domain.py

@@ -0,0 +1,39 @@
+import peewee
+from fixtures import demo_database
+
+from keyosk import database
+
+
+def test_meta():
+
+    models = [database.Domain, database.DomainAccessList, database.DomainPermission]
+
+    for model in models:
+        for key in model.dict_keys():
+            assert hasattr(model, key)
+            attr = getattr(model, key)
+
+            if key in model.foreign_ref():
+                assert isinstance(attr, peewee.ForeignKeyField)
+            else:
+                assert not isinstance(attr, peewee.ForeignKeyField)
+
+            if key in model.foreign_backref():
+                assert isinstance(attr, peewee.BackrefAccessor)
+            else:
+                assert not isinstance(attr, peewee.BackrefAccessor)
+
+
+def test_formatting(demo_database):
+    for domain in database.Domain.select():
+        assert list(dict(domain).keys()) == database.Domain.dict_keys()
+        assert str(domain.uuid) in str(domain)
+        assert domain.name in str(domain)
+
+    for permission in database.DomainPermission.select():
+        assert list(dict(permission).keys()) == database.DomainPermission.dict_keys()
+        assert str(permission.uuid) not in str(permission)
+
+    for access_list in database.DomainAccessList.select():
+        assert list(dict(access_list).keys()) == database.DomainAccessList.dict_keys()
+        assert str(access_list.uuid) not in str(access_list)