Update models for event sourcing

tests/models/test_product.py

@@ -0,0 +1,32 @@
+import pytest
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import Session
+
+from dibbler.models import Product
+
+
+def insert_test_data(sql_session: Session) -> Product:
+    product = Product("1234567890123", "Test Product")
+    sql_session.add(product)
+    sql_session.commit()
+    return product
+
+
+def test_product_no_duplicate_barcodes(sql_session: Session):
+    product = insert_test_data(sql_session)
+
+    duplicate_product = Product(product.bar_code, "Hehe >:)")
+    sql_session.add(duplicate_product)
+
+    with pytest.raises(IntegrityError):
+        sql_session.commit()
+
+
+def test_product_no_duplicate_names(sql_session: Session):
+    product = insert_test_data(sql_session)
+
+    duplicate_product = Product("1918238911928", product.name)
+    sql_session.add(duplicate_product)
+
+    with pytest.raises(IntegrityError):
+        sql_session.commit()