Fix CheckoutInfoByCheckoutTokenLoader for checkout with voucher that …

…does not exist

saleor/graphql/checkout/dataloaders.py

@@ -503,6 +503,7 @@ def with_checkout_info(results):
                     voucher_code_map = {
                         voucher_code.code: voucher_code
                         for voucher_code in voucher_codes
+                        if voucher_code
                     }
                     tax_configuration_by_channel_map = {
                         tax_configuration.channel_id: tax_configuration

saleor/graphql/checkout/tests/test_checkout.py

@@ -1983,6 +1983,71 @@ def test_checkout_prices_with_voucher(user_api_client, checkout_with_item_and_vo
     )
 
 
+def test_checkout_prices_with_voucher_code_that_doesnt_exist(
+    user_api_client, checkout_with_item_and_voucher, voucher
+):
+    # given
+    checkout = checkout_with_item_and_voucher
+    query = QUERY_CHECKOUT_PRICES
+    variables = {"id": to_global_id_or_none(checkout)}
+    voucher.delete()
+
+    # when
+    response = user_api_client.post_graphql(query, variables)
+    content = get_graphql_content(response)
+    data = content["data"]["checkout"]
+
+    # then
+    assert data["token"] == str(checkout.token)
+    assert len(data["lines"]) == checkout.lines.count()
+    manager = get_plugins_manager(allow_replica=False)
+    lines, _ = fetch_checkout_lines(checkout)
+    checkout_info = fetch_checkout_info(checkout, lines, manager)
+    total = calculations.checkout_total(
+        manager=manager,
+        checkout_info=checkout_info,
+        lines=lines,
+        address=checkout_info.shipping_address,
+    )
+    assert data["totalPrice"]["gross"]["amount"] == (total.gross.amount)
+    subtotal = calculations.checkout_subtotal(
+        manager=manager,
+        checkout_info=checkout_info,
+        lines=lines,
+        address=checkout_info.shipping_address,
+    )
+    assert data["subtotalPrice"]["gross"]["amount"] == (subtotal.gross.amount)
+    line_info = lines[0]
+    assert line_info.line.quantity > 0
+    line_total_price = calculations.checkout_line_total(
+        manager=manager,
+        checkout_info=checkout_info,
+        lines=lines,
+        checkout_line_info=line_info,
+    )
+    assert data["lines"][0]["unitPrice"]["gross"]["amount"] == float(
+        quantize_price(
+            line_total_price.gross.amount / line_info.line.quantity, checkout.currency
+        )
+    )
+    assert (
+        data["lines"][0]["totalPrice"]["gross"]["amount"]
+        == line_total_price.gross.amount
+    )
+    undiscounted_unit_price = line_info.variant.get_price(
+        line_info.channel_listing,
+        line_info.line.price_override,
+    )
+    assert (
+        data["lines"][0]["undiscountedUnitPrice"]["amount"]
+        == undiscounted_unit_price.amount
+    )
+    assert (
+        data["lines"][0]["undiscountedTotalPrice"]["amount"]
+        == undiscounted_unit_price.amount * line_info.line.quantity
+    )
+
+
 def test_query_checkouts(
     checkout_with_item, staff_api_client, permission_manage_checkouts
 ):