Add shopping cart and related models

test/test_models.py

@@ -1,16 +1,28 @@
+import pytest
+
 from allmende_payment_system.models import Account, User
 
 
-def test_user_model(test_db):
+@pytest.fixture(scope="function")
+def test_user(test_db):
     user = User(username="test", display_name="Test User")
     test_db.add(user)
-    test_db.commit()
+    test_db.flush()
+    return user
 
-    assert user.id is not None
+
+def test_user_model(test_db, test_user):
+    assert test_user.id is not None
 
     account = Account(name="Test Account")
-    account.users.append(user)
+    account.users.append(test_user)
     test_db.add(account)
-    test_db.commit()
+    test_db.flush()
 
-    assert len(user.accounts) == 1
+    assert len(test_user.accounts) == 1
+
+
+def test_user_shopping_cart_new(test_db, test_user):
+    cart = test_user.shopping_cart
+
+    assert len(cart.items) == 0