add shipping costs with live exchange rates and country detection
Shipping rates fetched from Printify during product sync, converted to GBP at sync time using frankfurter.app ECB exchange rates with 5% buffer. Cached in shipping_rates table per blueprint/provider/country. Cart page shows shipping estimate with country selector (detected from Accept-Language header, persisted in cookie). Stripe Checkout includes shipping_options for UK domestic and international delivery. Order shipping_cost extracted from Stripe on payment. ScheduledSyncWorker runs every 6 hours via Oban cron to keep rates and exchange rates fresh. REST_OF_THE_WORLD fallback covers unlisted countries. 780 tests, 0 failures. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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jamey
310
test/simpleshop_theme/shipping_test.exs
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310
test/simpleshop_theme/shipping_test.exs
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defmodule SimpleshopTheme.ShippingTest do
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use SimpleshopTheme.DataCase, async: false
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alias SimpleshopTheme.Shipping
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alias SimpleshopTheme.Shipping.ShippingRate
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import SimpleshopTheme.ProductsFixtures
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describe "upsert_rates/2" do
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test "inserts new rates" do
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conn = provider_connection_fixture()
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rates = [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 450,
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additional_item_cost: 100,
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currency: "GBP"
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},
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "US",
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first_item_cost: 650,
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additional_item_cost: 150,
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currency: "USD"
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}
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]
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assert {:ok, 2} = Shipping.upsert_rates(conn.id, rates)
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assert Repo.aggregate(ShippingRate, :count) == 2
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end
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test "replaces existing rates on conflict" do
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conn = provider_connection_fixture()
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rates = [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 450,
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additional_item_cost: 100,
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currency: "GBP"
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}
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]
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{:ok, 1} = Shipping.upsert_rates(conn.id, rates)
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updated_rates = [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 550,
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additional_item_cost: 200,
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currency: "GBP"
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}
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]
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{:ok, 1} = Shipping.upsert_rates(conn.id, updated_rates)
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assert Repo.aggregate(ShippingRate, :count) == 1
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rate = Repo.one(ShippingRate)
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assert rate.first_item_cost == 550
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assert rate.additional_item_cost == 200
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end
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end
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describe "get_rate/3" do
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test "returns rate when it exists" do
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conn = provider_connection_fixture()
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{:ok, _} =
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Shipping.upsert_rates(conn.id, [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 450,
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additional_item_cost: 100,
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currency: "GBP"
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}
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])
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rate = Shipping.get_rate(100, 200, "GB")
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assert rate.first_item_cost == 450
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assert rate.country_code == "GB"
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end
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test "returns nil when no rate exists" do
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assert Shipping.get_rate(999, 999, "XX") == nil
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end
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end
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describe "calculate_for_cart/2" do
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test "returns {:ok, 0} for empty cart" do
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assert {:ok, 0} = Shipping.calculate_for_cart([], "GB")
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end
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test "calculates shipping for single item" do
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conn = provider_connection_fixture()
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product =
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product_fixture(%{
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provider_connection: conn,
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provider_data: %{"blueprint_id" => 100, "print_provider_id" => 200}
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})
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variant = product_variant_fixture(%{product: product})
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{:ok, _} =
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Shipping.upsert_rates(conn.id, [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 450,
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additional_item_cost: 100,
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currency: "GBP"
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}
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])
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cart_items = [%{variant_id: variant.id, quantity: 1}]
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assert {:ok, 450} = Shipping.calculate_for_cart(cart_items, "GB")
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end
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test "calculates shipping for multiple quantities" do
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conn = provider_connection_fixture()
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product =
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product_fixture(%{
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provider_connection: conn,
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provider_data: %{"blueprint_id" => 100, "print_provider_id" => 200}
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})
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variant = product_variant_fixture(%{product: product})
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{:ok, _} =
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Shipping.upsert_rates(conn.id, [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 450,
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additional_item_cost: 100,
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currency: "GBP"
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}
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])
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cart_items = [%{variant_id: variant.id, quantity: 3}]
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# first_item_cost + 2 * additional_item_cost = 450 + 200 = 650
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assert {:ok, 650} = Shipping.calculate_for_cart(cart_items, "GB")
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end
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test "returns error when no rates found" do
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conn = provider_connection_fixture()
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product =
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product_fixture(%{
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provider_connection: conn,
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provider_data: %{"blueprint_id" => 100, "print_provider_id" => 200}
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})
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variant = product_variant_fixture(%{product: product})
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cart_items = [%{variant_id: variant.id, quantity: 1}]
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assert {:error, :rates_not_found} = Shipping.calculate_for_cart(cart_items, "XX")
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end
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test "groups items by print provider" do
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conn = provider_connection_fixture()
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product1 =
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product_fixture(%{
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provider_connection: conn,
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provider_data: %{"blueprint_id" => 100, "print_provider_id" => 200}
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})
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product2 =
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product_fixture(%{
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provider_connection: conn,
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provider_data: %{"blueprint_id" => 101, "print_provider_id" => 200}
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})
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variant1 = product_variant_fixture(%{product: product1})
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variant2 = product_variant_fixture(%{product: product2})
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{:ok, _} =
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Shipping.upsert_rates(conn.id, [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 450,
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additional_item_cost: 100,
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currency: "GBP"
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},
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%{
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blueprint_id: 101,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 500,
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additional_item_cost: 150,
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currency: "GBP"
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}
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])
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cart_items = [
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%{variant_id: variant1.id, quantity: 1},
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%{variant_id: variant2.id, quantity: 1}
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]
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# Same provider: highest first_item_cost (500) + 1 additional item cost
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assert {:ok, cost} = Shipping.calculate_for_cart(cart_items, "GB")
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# 500 (highest first item) + one additional item cost (100 or 150)
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assert cost in [600, 650]
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end
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end
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describe "upsert_rates/3 with exchange rates" do
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test "converts rates to GBP at sync time with buffer" do
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conn = provider_connection_fixture()
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exchange_rates = %{"USD" => 0.80}
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rates = [
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%{
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blueprint_id: 100,
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print_provider_id: 1,
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country_code: "US",
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first_item_cost: 1000,
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additional_item_cost: 500,
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currency: "USD"
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}
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]
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{:ok, 1} = Shipping.upsert_rates(conn.id, rates, exchange_rates)
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rate = Shipping.get_rate(100, 1, "US")
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assert rate.currency == "GBP"
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# 1000 USD cents * 0.80 rate * 1.05 buffer, ceil'd
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assert rate.first_item_cost == 841
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assert rate.additional_item_cost == 421
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end
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test "leaves GBP rates unconverted" do
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conn = provider_connection_fixture()
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exchange_rates = %{"USD" => 0.80}
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rates = [
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%{
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blueprint_id: 100,
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print_provider_id: 1,
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country_code: "GB",
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first_item_cost: 500,
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additional_item_cost: 200,
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currency: "GBP"
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}
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]
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{:ok, 1} = Shipping.upsert_rates(conn.id, rates, exchange_rates)
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rate = Shipping.get_rate(100, 1, "GB")
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assert rate.currency == "GBP"
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assert rate.first_item_cost == 500
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assert rate.additional_item_cost == 200
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end
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end
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describe "list_available_countries/0" do
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test "returns distinct country codes" do
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conn = provider_connection_fixture()
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{:ok, _} =
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Shipping.upsert_rates(conn.id, [
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 450,
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additional_item_cost: 100,
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currency: "GBP"
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},
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%{
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blueprint_id: 100,
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print_provider_id: 200,
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country_code: "US",
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first_item_cost: 650,
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additional_item_cost: 150,
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currency: "USD"
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},
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%{
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blueprint_id: 101,
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print_provider_id: 200,
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country_code: "GB",
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first_item_cost: 500,
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additional_item_cost: 100,
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currency: "GBP"
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}
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])
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countries = Shipping.list_available_countries()
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assert "GB" in countries
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assert "US" in countries
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assert length(countries) == 2
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end
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end
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end
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40
test/simpleshop_theme/sync/scheduled_sync_worker_test.exs
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40
test/simpleshop_theme/sync/scheduled_sync_worker_test.exs
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defmodule SimpleshopTheme.Sync.ScheduledSyncWorkerTest do
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use SimpleshopTheme.DataCase, async: false
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use Oban.Testing, repo: SimpleshopTheme.Repo
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alias SimpleshopTheme.Sync.ScheduledSyncWorker
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alias SimpleshopTheme.Sync.ProductSyncWorker
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import SimpleshopTheme.ProductsFixtures
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describe "perform/1" do
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test "enqueues sync for enabled connections" do
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conn = provider_connection_fixture(%{enabled: true})
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Oban.Testing.with_testing_mode(:manual, fn ->
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assert :ok = perform_job(ScheduledSyncWorker, %{})
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assert_enqueued(
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worker: ProductSyncWorker,
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args: %{provider_connection_id: conn.id}
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)
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end)
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end
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test "skips disabled connections" do
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_conn = provider_connection_fixture(%{enabled: false})
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Oban.Testing.with_testing_mode(:manual, fn ->
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assert :ok = perform_job(ScheduledSyncWorker, %{})
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refute_enqueued(worker: ProductSyncWorker)
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end)
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end
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test "handles no connections gracefully" do
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Oban.Testing.with_testing_mode(:manual, fn ->
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assert :ok = perform_job(ScheduledSyncWorker, %{})
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refute_enqueued(worker: ProductSyncWorker)
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end)
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end
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end
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end
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